A Nonlinear Cylindrical Varistor and Its Application

A piezoresistor and piezoresistor technology, applied in piezoresistor cores, piezoresistors, etc., can solve problems such as carcinogenicity, achieve the effects of inhibiting growth, harmless to the human body and the environment, and dense materials

A piezoresistor and piezoresistor technology, applied in piezoresistor cores, piezoresistors, etc., can solve problems such as carcinogenicity, achieve the effects of inhibiting growth, harmless to the human body and the environment, and dense materials

CN107134332BActive Publication Date: 2018-11-20VOCATIONAL SKILLS TRAINING BASE OF STATE GRID JIANGSU ELECTRIC POWER CO
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  • A Nonlinear Cylindrical Varistor and Its Application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A non-linear cylindrical piezoresistor is composed of a piezoresistor ceramic sheet and a discontinuous electrode, and the piezoresistor ceramic sheet is composed of the following materials in parts by weight: 100 parts of zinc oxide, 0.3 parts of bismuth trioxide , 2.52 parts of silicon dioxide, 0.3 parts of titanium dioxide, 0.45 parts of nine cobalt octasulfide, 0.15 parts of silicon carbide, 0.05 parts of zirconium nitride, 0.15 parts of diyttrium trioxide, and 2.5 parts of calcium copper titanate;

[0019] The discontinuous electrode is composed of carbon powder, butyl carbitol acetate, lecithin, nitrocellulose and ethanol.

[0020] The nonlinear cylindrical piezoresistor is suitable for overvoltage protection of power diodes, silicon stacks, and small and medium power thyristors, and is suitable for altitudes less than 2,000 meters, atmospheric pressure 86-106KPa, and ambient temperature -40~+ 85°C environment.

Embodiment 2

[0022] A non-linear cylindrical piezoresistor is composed of a piezoresistor ceramic sheet and a discontinuous electrode, and the piezoresistor ceramic sheet is composed of the following materials in parts by weight: 90 parts of zinc oxide, 0.68 parts of bismuth trioxide , 3.2 parts of silicon dioxide, 0.25 parts of titanium dioxide, 0.4 parts of nine cobalt octasulfide, 0.12 parts of silicon carbide, 0.05 parts of zirconium nitride, 1.65 parts of diyttrium trioxide, and 1.5 parts of calcium copper titanate.

[0023] The discontinuous electrode is composed of gold powder, terpineol, butyl carbitol acetate, nitrocellulose and methanol.

[0024] The nonlinear cylindrical piezoresistor is suitable for overvoltage protection of power diodes, silicon stacks, and small and medium power thyristors, and is suitable for altitudes less than 2,000 meters, atmospheric pressure 86-106KPa, and ambient temperature -40~+ 85°C environment.

Embodiment 3

[0026] A nonlinear cylindrical piezoresistor is composed of piezoresistor ceramic sheets and discontinuous electrodes, and the piezoresistor ceramic sheets are composed of the following materials in parts by weight: 98 parts of zinc oxide, 0.5 parts of bismuth trioxide , 2.86 parts of silicon dioxide, 0.28 parts of titanium dioxide, 0.42 parts of cobalt octasulfide, 0.08 parts of silicon carbide, 0.03 parts of zirconium nitride, 0.05 parts of diyttrium trioxide, and 1.65 parts of calcium copper titanate.

[0027] The discontinuous electrode is composed of nickel powder, lecithin, ethyl cellulose and acetone.

[0028] The nonlinear cylindrical piezoresistor is suitable for overvoltage protection of power diodes, silicon stacks, and small and medium power thyristors, and is suitable for altitudes less than 2,000 meters, atmospheric pressure 86-106KPa, and ambient temperature -40~+ 85°C environment.

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Abstract

The invention discloses a nonlinear cylindrical pressure sensitive resistor and application thereof. The nonlinear cylindrical pressure sensitive resistor is composed of a pressure sensitive resistor ceramic wafer and a non-continuous electrode. Due to doping of a zinc oxide material in the pressure sensitive resistor ceramic wafer, grains of the zinc oxide are refined, the surface density of the pressure sensitive resistor ceramic wafer is increased, the characteristics of the pressure sensitive resistor are improved, and the current-force impact resistance and nonlinear coefficient of the resistor are improved, so that the pressure sensitive resistor has high voltage gradient and beneficial electrical properties, reaches a nanosecond over-voltage response speed and is fast in over-voltage recovery and zero in follow current. The pressure sensitive resistor disclosed by the invention is safe and non-toxic in material and harmless to the human body and environment and can be widely applied to over-voltage protection of power diodes, silicon stacks, medium / low-power silicon controlled rectifiers and the like.

Description

technical field [0001] The invention relates to the technical field of electronic components, in particular to a nonlinear cylindrical piezoresistor and its application. Background technique [0002] Varistor is an electronic component whose resistance changes nonlinearly with the applied voltage, that is, when the applied voltage value exceeds a certain threshold voltage, the resistor whose resistance changes rapidly is a kind of resistor whose resistance is sensitive to the applied voltage. , and electronic components that can be used repeatedly without damage, also known as "surge absorbers", are mainly used to protect electronic products or components from the effects of switches or lightning strikes. When the varistor is not working, it has a high impedance (several megohms) relative to the electronic components to be protected, and it will not change the design circuit characteristics, but when the instantaneous surge voltage appears (more than the varistor collapse v...

Claims

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Application Information

Patent Timeline
20 Nov 2018
Publication
CN107134332B
IPC
H01C7/105; H01C7/112
CPC
H01C7/105; H01C7/112
Inventors
张长营; 恽瑞金