CN100411858C - Method for preparing polyunsymfluorethylene piezoelectric tubes - Google Patents
Method for preparing polyunsymfluorethylene piezoelectric tubes Download PDFInfo
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- CN100411858C CN100411858C CNB2005100171222A CN200510017122A CN100411858C CN 100411858 C CN100411858 C CN 100411858C CN B2005100171222 A CNB2005100171222 A CN B2005100171222A CN 200510017122 A CN200510017122 A CN 200510017122A CN 100411858 C CN100411858 C CN 100411858C
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Abstract
The present invention relates to a method for preparing a piezoelectric tube made from polyvinylidene fluoride. Polyvinylidene fluoride granules are extruded to form a tube which is immediately stretched, and then the extruded pipe is heated to a certain temperature between a fast stretching device and a slow stretching device through a fast stretching region stretched by 3 to 8 times; heating temperature is between room temperature and the temperature of 160 DEG C, and the heating temperature doesn't exceed the crystal melting point of material. A suitable pipe stretching ratio is between 4:1 to 5:1, and a transverse electric field is added to a stretching point; a high voltage of 5kV to 150kV is externally connected, and the field strength of 50 V/mu m is maximum field strength which the material can bear so as to ensure that the front and the back of the stretching point and the stretching point all have enough electric fields; the pipe can not be broken down, and can not be stretched to be broken so as to obtain the piezoelectric tube made from polyvinylidene fluoride with piezoelectric performance. The present invention has the characteristics of convenient piezoelectric tube extruding, stretching and polarizing process, easy operation and superior tube performance.
Description
Technical field
The invention belongs to the preparation method of polyunsymfluorethylepiezoelectric piezoelectric tubes.
Background technology
High polymer piezoelectric material is widely used in industries such as space flight, electronics, medical treatment, and piezo tube is applicable to application such as piezoelectricity and pyroelectric detector, comprises the ultrasonic scanning detector, as medical scanners; The infrared sensing device; Tension force and distortion measurement; Pressure sensitive device, as the traffic test, sense of touch and fluctuation sentive switch; The seismic survey instrument; Weighing apparatus.Therefore piezo tube will be subjected to people's attention more and more widely.-1975 years Naohiro Murayama; People such as Takao Oikawa are on U.S. Pat 3878274 in disclosed being entitled as " polyvinylidene fluoride resin processing film process ", the polyvinylidene fluoride resin powder that the preparation method of piezoelectric membrane adopts suspension polymerisation to obtain has been described, film extrusion, carry out 3.5 times stretching, stretching is divided into dual mode: perpendicular to winding direction; Be parallel to winding direction.The aluminium electrode is deposited on film surface, to the film processing that polarizes, 100～130 ℃ of its draft temperatures; 90 ℃ of polarization temperature; Between polarizing voltage 50～2000KV/cm; 30 minutes polarization times; Heat treatment temperature is 70 ℃, heat treatment time 1 hour.The stretching ratio of this technology can not reach that high crystal formation transforms and the orderly orientation of electricdomain, and technology can not serialization processable polymer piezoelectric membrane, thereby influences the film piezo-electric performance.Preparation and production for the tubular piezo-electric material still do not have solution preferably.
Summary of the invention
The purpose of this invention is to provide a kind of method for preparing polyunsymfluorethylepiezoelectric piezoelectric tubes.
It is as follows to implement technical scheme of the present invention:
The Kynoar pipe is by traditional extruder for shaping, extruder (1) melts granular Kynoar as shown in Figure 1, extrude through the sleeve pipe that has cooling water (3) that head (2) connects, be cylinder (4) in the sleeve pipe (3), cylinder (4) is concentric with sleeve pipe (3), and cylinder (4) is metal or pottery, metal comprises: copper, steel, aluminium, chromium etc.; Kynoar pipe (5) extrusion molding from the concentric annular slit of sleeve pipe (3) and cylinder (4); The Kynoar pipe of extruding (5) inserts as shown in Figure 2 in the elongated tubular mould (7); in Kynoar pipe (5), put into a plain conductor (10); lead (10) ground connection; the external high voltage of elongated tubular mould (7); magnitude of voltage is between 5～150kV; mould (7) and lead (10) provide polarized electric field for material; electric-field intensity is at 30～150V/ μ m; Kynoar pipe (5) two ends are used stretching device (6) and stretching device (9) clamping fast at a slow speed respectively; be stretching at a slow speed stretching clamp and carry out between the stretching clamp fast; fast the draw speed of stretching device (9) is 3～8 times of stretching device (6) draw speed at a slow speed; because tensile force often has some slips fast; to such an extent as to effectively draw ratio is often less than the draw speed ratio; as: if velocity ratio is (fast: be 6: 1 at a slow speed); and draw ratio (fast: may only be 4: 1 at a slow speed); only draw ratio is between 4: 1～5: 1; draw speed is 1～20cm/min at a slow speed; heater (8) is carrying out local heat to tubing between stretching device (6) and the quick stretching device (9) at a slow speed; heating-up temperature is between room temperature～160 ℃; Kynoar pipe (5) is subjected to tensile force and in heating place deformation takes place; mould (7) and lead (10) are suppressed electrical polyunsymfluorethylepiezoelectric piezoelectric tubes (5) for material provides polarized electric field thereby obtain having had simultaneously.Its piezoelectric constant d
33Be 5～20pC/N.Kynoar pipe (5) thickness after the polarization that stretches is 50～1000 μ m, and internal diameter is 500～10000 μ m, and external diameter is 600～11000 μ m, and length is 0.5 meter～3 meters.
Described stretching is to carry out between the crystalline melt point temperature of polymer in room temperature, and when being higher than the room temperature extruded material, heating makes stretching more convenient, mode of heating such as radiation, blows hot gas or baking; The complexity that stretches is relevant with temperature, as: the stretching same area compares with low temperature condition that stretching is easier to be carried out under higher temperature.An important part is polarization in the preparation process, and suitable voltage is 5kV～150kV.Electric field is realized polarization by the corona discharge unit of lead in the tubing hole and outer sleeve to tubing, the lead ground connection in the hole, and the corona discharge unit connects constant high voltage.
Polyunsymfluorethylepiezoelectric piezoelectric tubes of the present invention has one or two surfaces to need bonding conductor.The solid phase conductor that is fit to comprises metal and non-metal conductor, as: platinum, gold, silver, electrically-conducting paint, electroconductive binder, carbon etc.; Metal is by the surface of methods such as vacuum evaporation, sputter, chemical deposit, ion plating or electrically-conducting paint coating, scattering, stickup attached to pipe; Be mercury or electrolyte as liquid conductor in the hole; Plain conductor in the pipe is stayed in the Kynoar pipe, as an electrode, is similar to enamel-covered wire.
The present invention is to provide a kind of method for preparing polyunsymfluorethylepiezoelectric piezoelectric tubes.Characteristics of the present invention are extruding of piezo tube and the polarization that stretches, and technology is easy, and is easy to operate, the pipe function admirable.
The present invention extrudes formation tubing with the Kynoar particle, and stretch immediately, draw ratio is between 4: 1～5: 1, simultaneously add a horizontal electric field at drawing point, the maximum field strength that field intensity can be born at 50V/ μ m～material, guarantee before and after the drawing point and drawing point all has enough electric fields, manage not breakdown, thereby acquisition has the polyunsymfluorethylepiezoelectric piezoelectric tubes of piezoelectric property.
Description of drawings
Accompanying drawing 1 is a Kynoar pipe extrusion schematic diagram.
Accompanying drawing 2 is a Kynoar pipe stretching polarization process schematic diagram.This figure is the specification digest accompanying drawing.
The specific embodiment
Embodiment of the present invention are described below in conjunction with the accompanying drawings:
Embodiment 1: granular Kynoar is extruded by the moulding of water-bath cooling steel sleeve (3) 220 ℃ of extruder (1) head (2) temperature, tubing is placed elongated tubular mould (7), again copper conductor (10) is put into Kynoar pipe (5), Kynoar pipe (5) two ends are used stretching device (6) and stretching device (9) clamping fast at a slow speed respectively, fast the draw speed of stretching device (9) is 6 times of stretching device (6) draw speed at a slow speed, heater (8) carries out local heat to tubing, heating-up temperature is between 70 ℃, Kynoar pipe (5) is subjected to tensile force and in heating place deformation takes place, elongated tubular mould (7) leads to high-tension electricity simultaneously, copper conductor (10) ground connection, form the high voltage polarization electric field, field intensity is 50V/ μ m.Kynoar pipe (5) thickness after the polarization that stretches is 100 μ m, and internal diameter is 1000 μ m, and external diameter is 1100 μ m, and length is 1.5 meters, piezoelectric constant d
33Be 8.7pC/N.
Embodiment 2: granular Kynoar is extruded by the moulding of water-bath cooling steel sleeve (3) 220 ℃ of extruder (1) head (2) temperature, tubing is placed elongated tubular mould (7), again copper conductor (10) is put into Kynoar pipe (5), Kynoar pipe (5) two ends are used stretching device (6) and stretching device (9) clamping fast at a slow speed respectively, fast the draw speed of stretching device (9) is 6 times of stretching device (6) draw speed at a slow speed, heater (8) carries out local heat to tubing, heating-up temperature is between 75 ℃, Kynoar pipe (5) is subjected to tensile force and in heating place deformation takes place, elongated tubular mould (7) leads to high-tension electricity simultaneously, copper conductor (10) ground connection, form the high voltage polarization electric field, field intensity is 50V/ μ m.Kynoar pipe (5) thickness after the polarization that stretches is 100 μ m, and internal diameter is 1000 μ m, and external diameter is 1100 μ m, and length is 1.5 meters, piezoelectric constant d
33Be 10.2pC/N.
Embodiment 3: granular Kynoar is extruded by the moulding of water-bath cooling steel sleeve (3) 220 ℃ of extruder (1) head (2) temperature, tubing is placed elongated tubular mould (7), again copper conductor (10) is put into Kynoar pipe (5), Kynoar pipe (5) two ends are used stretching device (6) and stretching device (9) clamping fast at a slow speed respectively, fast the draw speed of stretching device (9) is 6 times of stretching device (6) draw speed at a slow speed, heater (8) carries out local heat to tubing, heating-up temperature is between 80 ℃, Kynoar pipe (5) is subjected to tensile force and in heating place deformation takes place, elongated tubular mould (7) leads to high-tension electricity simultaneously, copper conductor (10) ground connection, form the high voltage polarization electric field, field intensity is 50V/ μ m.Kynoar pipe (5) thickness after the polarization that stretches is 100 μ m, and internal diameter is 1000 μ m, and external diameter is 1100 μ m, and length is 1.5 meters, piezoelectric constant d
33Be 15.4pC/N.
Embodiment 4: granular Kynoar is extruded by the moulding of water-bath cooling steel sleeve (3) 220 ℃ of extruder (1) head (2) temperature, tubing is placed elongated tubular mould (7), again copper conductor (10) is put into Kynoar pipe (5), Kynoar pipe (5) two ends are used stretching device (6) and stretching device (9) clamping fast at a slow speed respectively, fast the draw speed of stretching device (9) is 6 times of stretching device (6) draw speed at a slow speed, heater (8) carries out local heat to tubing, heating-up temperature is between 85 ℃, Kynoar pipe (5) is subjected to tensile force and in heating place deformation takes place, elongated tubular mould (7) leads to high-tension electricity simultaneously, copper conductor (10) ground connection, form the high voltage polarization electric field, field intensity is 50V/ μ m.Kynoar pipe (5) thickness after the polarization that stretches is 100 μ m, and internal diameter is 1000 μ m, and external diameter is 1100 μ m, and length is 1.5 meters, piezoelectric constant d
33Be 18.5pC/N.
Embodiment 5: granular Kynoar is extruded by the moulding of water-bath cooling steel sleeve (3) 220 ℃ of extruder (1) head (2) temperature, tubing is placed elongated tubular mould (7), again copper conductor (10) is put into Kynoar pipe (5), Kynoar pipe (5) two ends are used stretching device (6) and stretching device (9) clamping fast at a slow speed respectively, fast the draw speed of stretching device (9) is 6 times of stretching device (6) draw speed at a slow speed, heater (8) carries out local heat to tubing, heating-up temperature is between 90 ℃, Kynoar pipe (5) is subjected to tensile force and in heating place deformation takes place, elongated tubular mould (7) leads to high-tension electricity simultaneously, copper conductor (10) ground connection, form the high voltage polarization electric field, field intensity is 50V/ μ m.Kynoar pipe (5) thickness after the polarization that stretches is 100 μ m, and internal diameter is 1000 μ m, and external diameter is 1100 μ m, and length is 1.5 meters, piezoelectric constant d
33Be 16.8pC/N.
Embodiment 6: granular Kynoar is extruded by the moulding of water-bath cooling steel sleeve (3) 220 ℃ of extruder (1) head (2) temperature, tubing is placed elongated tubular mould (7), again copper conductor (10) is put into Kynoar pipe (5), Kynoar pipe (5) two ends are used stretching device (6) and stretching device (9) clamping fast at a slow speed respectively, fast the draw speed of stretching device (9) is 6 times of stretching device (6) draw speed at a slow speed, heater (8) carries out local heat to tubing, heating-up temperature is between 95 ℃, Kynoar pipe (5) is subjected to tensile force and in heating place deformation takes place, elongated tubular mould (7) leads to high-tension electricity simultaneously, copper conductor (10) ground connection, form the high voltage polarization electric field, field intensity is 50V/ μ m.Kynoar pipe (5) thickness after the polarization that stretches is 100 μ m, and internal diameter is 1000 μ m, and external diameter is 1100 μ m, and length is 1.5 meters, piezoelectric constant d
33Be 14.5pC/N.
Embodiment 7: granular Kynoar is extruded by the moulding of water-bath cooling steel sleeve (3) 220 ℃ of extruder (1) head (2) temperature, tubing is placed elongated tubular mould (7), again copper conductor (10) is put into Kynoar pipe (5), Kynoar pipe (5) two ends are used stretching device (6) and stretching device (9) clamping fast at a slow speed respectively, fast the draw speed of stretching device (9) is 7 times of stretching device (6) draw speed at a slow speed, heater (8) carries out local heat to tubing, heating-up temperature is between 85 ℃, Kynoar pipe (5) is subjected to tensile force and in heating place deformation takes place, elongated tubular mould (7) leads to high-tension electricity simultaneously, copper conductor (10) ground connection, form the high voltage polarization electric field, field intensity is 50V/ μ m.Kynoar pipe (5) thickness after the polarization that stretches is 95 μ m, and internal diameter is 1002 μ m, and external diameter is 1097 μ m, and length is 1.5 meters, piezoelectric constant d
33Be 19.2pC/N.
Embodiment 8: granular Kynoar is extruded by the moulding of water-bath cooling steel sleeve (3) 220 ℃ of extruder (1) head (2) temperature, tubing is placed elongated tubular mould (7), again copper conductor (10) is put into Kynoar pipe (5), Kynoar pipe (5) two ends are used stretching device (6) and stretching device (9) clamping fast at a slow speed respectively, fast the draw speed of stretching device (9) is 8 times of stretching device (6) draw speed at a slow speed, heater (8) carries out local heat to tubing, heating-up temperature is between 85 ℃, Kynoar pipe (5) is subjected to tensile force and in heating place deformation takes place, elongated tubular mould (7) leads to high-tension electricity simultaneously, copper conductor (10) ground connection, form the high voltage polarization electric field, field intensity is 50V/ μ m.Kynoar pipe (5) thickness after the polarization that stretches is 90 μ m, and internal diameter is 1006 μ m, and external diameter is 1096 μ m, and length is 1.5 meters, piezoelectric constant d
33Be 17.8pC/N.
Embodiment 9: granular Kynoar is extruded by the moulding of water-bath cooling steel sleeve (3) 220 ℃ of extruder (1) head (2) temperature, tubing is placed elongated tubular mould (7), again copper conductor (10) is put into Kynoar pipe (5), Kynoar pipe (5) two ends are used stretching device (6) and stretching device (9) clamping fast at a slow speed respectively, fast the draw speed of stretching device (9) is 8 times of stretching device (6) draw speed at a slow speed, heater (8) carries out local heat to tubing, heating-up temperature is between 90 ℃, Kynoar pipe (5) is subjected to tensile force and in heating place deformation takes place, elongated tubular mould (7) leads to high-tension electricity simultaneously, copper conductor (10) ground connection, form the high voltage polarization electric field, field intensity is 50V/ μ m.Kynoar pipe (5) thickness after the polarization that stretches is 90 μ m, and internal diameter is 1006 μ m, and external diameter is 1096 μ m, and length is 1.5 meters, piezoelectric constant d
33Be 16.7pC/N.
Embodiment 10: granular Kynoar is extruded by the moulding of water-bath cooling steel sleeve (3) 190 ℃ of extruder (1) head (2) temperature, tubing is placed elongated tubular mould (7), again copper conductor (10) is put into Kynoar pipe (5), Kynoar pipe (5) two ends are used stretching device (6) and stretching device (9) clamping fast at a slow speed respectively, fast the draw speed of stretching device (9) is 6 times of stretching device (6) draw speed at a slow speed, heater (8) carries out local heat to tubing, heating-up temperature is between 85 ℃, Kynoar pipe (5) is subjected to tensile force and in heating place deformation takes place, elongated tubular mould (7) leads to high-tension electricity simultaneously, copper conductor (10) ground connection, form the high voltage polarization electric field, field intensity is 50V/ μ m.Kynoar pipe (5) thickness after the polarization that stretches is 100 μ m, and internal diameter is 1000 μ m, and external diameter is 1100 μ m, and length is 1.5 meters, piezoelectric constant d
33Be 16.5pC/N.
Embodiment 11: granular Kynoar is extruded by the moulding of water-bath cooling steel sleeve (3) 200 ℃ of extruder (1) head (2) temperature, tubing is placed elongated tubular mould (7), again copper conductor (10) is put into Kynoar pipe (5), Kynoar pipe (5) two ends are used stretching device (6) and stretching device (9) clamping fast at a slow speed respectively, fast the draw speed of stretching device (9) is 6 times of stretching device (6) draw speed at a slow speed, heater (8) carries out local heat to tubing, heating-up temperature is between 85 ℃, Kynoar pipe (5) is subjected to tensile force and in heating place deformation takes place, elongated tubular mould (7) leads to high-tension electricity simultaneously, copper conductor (10) ground connection, form the high voltage polarization electric field, field intensity is 50V/ μ m.Kynoar pipe (5) thickness after the polarization that stretches is 100 μ m, and internal diameter is 1000 μ m, and external diameter is 1100 μ m, and length is 1.5 meters, piezoelectric constant d
33Be 17.0pC/N.
Embodiment 12: granular Kynoar is extruded by the moulding of water-bath cooling steel sleeve (3) 210 ℃ of extruder (1) head (2) temperature, tubing is placed elongated tubular mould (7), again copper conductor (10) is put into Kynoar pipe (5), Kynoar pipe (5) two ends are used stretching device (6) and stretching device (9) clamping fast at a slow speed respectively, fast the draw speed of stretching device (9) is 6 times of stretching device (6) draw speed at a slow speed, heater (8) carries out local heat to tubing, heating-up temperature is between 85 ℃, Kynoar pipe (5) is subjected to tensile force and in heating place deformation takes place, elongated tubular mould (7) leads to high-tension electricity simultaneously, copper conductor (10) ground connection, form the high voltage polarization electric field, field intensity is 50V/ μ m.Kynoar pipe (5) thickness after the polarization that stretches is 100 μ m, and internal diameter is 1000 μ m, and external diameter is 1100 μ m, and length is 1.5 meters, piezoelectric constant d
33Be 17.9pC/N.
Embodiment 13: granular Kynoar is extruded by the moulding of water-bath cooling steel sleeve (3) 230 ℃ of extruder (1) head (2) temperature, tubing is placed elongated tubular mould (7), again copper conductor (10) is put into Kynoar pipe (5), Kynoar pipe (5) two ends are used stretching device (6) and stretching device (9) clamping fast at a slow speed respectively, fast the draw speed of stretching device (9) is 6 times of stretching device (6) draw speed at a slow speed, heater (8) carries out local heat to tubing, heating-up temperature is between 85 ℃, Kynoar pipe (5) is subjected to tensile force and in heating place deformation takes place, elongated tubular mould (7) leads to high-tension electricity simultaneously, copper conductor (10) ground connection, form the high voltage polarization electric field, field intensity is 50V/ μ m.Kynoar pipe (5) thickness after the polarization that stretches is 100 μ m, and internal diameter is 1000 μ m, and external diameter is 1100 μ m, and length is 1.5 meters, piezoelectric constant d
33Be 18.1pC/N.
Embodiment 14: granular Kynoar is extruded by the moulding of water-bath cooling steel sleeve (3) 240 ℃ of extruder (1) head (2) temperature, tubing is placed elongated tubular mould (7), again copper conductor (10) is put into Kynoar pipe (5), Kynoar pipe (5) two ends are used stretching device (6) and stretching device (9) clamping fast at a slow speed respectively, fast the draw speed of stretching device (9) is 6 times of stretching device (6) draw speed at a slow speed, heater (8) carries out local heat to tubing, heating-up temperature is between 85 ℃, Kynoar pipe (5) is subjected to tensile force and in heating place deformation takes place, elongated tubular mould (7) leads to high-tension electricity simultaneously, copper conductor (10) ground connection, form the high voltage polarization electric field, field intensity is 50V/ μ m.Kynoar pipe (5) thickness after the polarization that stretches is 100 μ m, and internal diameter is 1000 μ m, and external diameter is 1100 μ m, and length is 1.5 meters, piezoelectric constant d
33Be 17.8pC/N.
Embodiment 15: granular Kynoar is extruded by the moulding of water-bath cooling steel sleeve (3) 250 ℃ of extruder (1) head (2) temperature, tubing is placed elongated tubular mould (7), again copper conductor (10) is put into Kynoar pipe (5), Kynoar pipe (5) two ends are used stretching device (6) and stretching device (9) clamping fast at a slow speed respectively, fast the draw speed of stretching device (9) is 6 times of stretching device (6) draw speed at a slow speed, heater (8) carries out local heat to tubing, heating-up temperature is between 85 ℃, Kynoar pipe (5) is subjected to tensile force and in heating place deformation takes place, elongated tubular mould (7) leads to high-tension electricity simultaneously, copper conductor (10) ground connection, form the high voltage polarization electric field, field intensity is 50V/ μ m.Kynoar pipe (5) thickness after the polarization that stretches is 100 μ m, and internal diameter is 1000 μ m, and external diameter is 1100 μ m, and length is 1.5 meters, piezoelectric constant d
33Be 18.6pC/N.
Claims (5)
1. the preparation method of a polyunsymfluorethylepiezoelectric piezoelectric tubes is characterized in that step and condition are as follows:
Extruder (1) melts granular Kynoar, extrude through the sleeve pipe that has cooling water (3) that head (2) connects, in the sleeve pipe (3) cylinder (4), cylinder (4) is concentric with sleeve pipe (3), Kynoar pipe (5) extrusion molding from the concentric annular slit of sleeve pipe (3) and cylinder (4); The Kynoar pipe of extruding (5) inserts in the mould (7), in Kynoar pipe (5), put into a lead (10), lead (10) ground connection, the external high-tension electricity 5kV～150kV of mould (7), mould (7) and lead (10) provide polarized electric field for material, electric-field intensity is at 30～150V/ μ m, Kynoar pipe (5) two ends are used stretching device (6) and stretching device (9) clamping fast at a slow speed respectively, be stretching at a slow speed stretching clamp and carry out between the stretching clamp fast, fast the draw speed of stretching device (9) is 3～8 times of stretching device (6) draw speed at a slow speed, draw speed is 1～20cm/min at a slow speed, heater (8) is carrying out local heat to tubing between stretching device (6) and the quick stretching device (9) at a slow speed, heating-up temperature is between room temperature～160 ℃, Kynoar pipe (5) is subjected to tensile force and is stretched in heating place generation deformation, thereby obtain having had and suppress electrical polyunsymfluorethylepiezoelectric piezoelectric tubes (5), the outer surface of polyunsymfluorethylepiezoelectric piezoelectric tubes (5) connects metallic conductor or non-metal conductor, and the polyunsymfluorethylepiezoelectric piezoelectric tubes internal surface of hole connects liquid conductor.
2. a kind of preparation method who prepares polyunsymfluorethylepiezoelectric piezoelectric tubes as claimed in claim 1 is characterized in that, the mode of described stretching heating adopts radiation, blows hot gas or baking.
3. a kind of preparation method who prepares polyunsymfluorethylepiezoelectric piezoelectric tubes as claimed in claim 1 or 2 is characterized in that, described polyunsymfluorethylepiezoelectric piezoelectric tubes outer surface need connect metallic conductor and be: platinum, gold, silver, copper or aluminium.
4. a kind of preparation method who prepares polyunsymfluorethylepiezoelectric piezoelectric tubes as claimed in claim 1 or 2 is characterized in that, described polyunsymfluorethylepiezoelectric piezoelectric tubes outer surface need connect non-metal conductor and be: electrically-conducting paint, electroconductive binder or carbon.
5. a kind of preparation method who prepares polyunsymfluorethylepiezoelectric piezoelectric tubes as claimed in claim 1 or 2 is characterized in that described polyunsymfluorethylepiezoelectric piezoelectric tubes internal surface of hole needs bonding conductor, as liquid conductor is: mercury or electrolyte.
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| CNB2005100171222A CN100411858C (en) | 2005-09-09 | 2005-09-09 | Method for preparing polyunsymfluorethylene piezoelectric tubes |
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| CN100411858C true CN100411858C (en) | 2008-08-20 |
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| CN114768897A (en) * | 2022-03-16 | 2022-07-22 | 广东省科学院生物与医学工程研究所 | Uniform pipeline stretching device and stretching method for generating microfluidic droplets |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4668449A (en) * | 1984-09-11 | 1987-05-26 | Raychem Corporation | Articles comprising stabilized piezoelectric vinylidene fluoride polymers |
| CN1187045A (en) * | 1996-12-31 | 1998-07-08 | 中国科学院长春应用化学研究所 | Method for preparing poly meta fluoroethylene piezoelectric film |
| CN1545149A (en) * | 2003-11-17 | 2004-11-10 | 中国科学院长春应用化学研究所 | Ordered orientation device for high polymer piezoelectric material |
-
2005
- 2005-09-09 CN CNB2005100171222A patent/CN100411858C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4668449A (en) * | 1984-09-11 | 1987-05-26 | Raychem Corporation | Articles comprising stabilized piezoelectric vinylidene fluoride polymers |
| CN1187045A (en) * | 1996-12-31 | 1998-07-08 | 中国科学院长春应用化学研究所 | Method for preparing poly meta fluoroethylene piezoelectric film |
| CN1545149A (en) * | 2003-11-17 | 2004-11-10 | 中国科学院长春应用化学研究所 | Ordered orientation device for high polymer piezoelectric material |
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