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Ceramic PTC thermistor capable of resisting high pulse overload, and manufacturing method thereof

A technology of thermistor and manufacturing method, applied in resistance manufacturing, resistors with positive temperature coefficient, resistors, etc., can solve the problems of thick film resistors, such as large volume, inability to obtain power, and poor withstand voltage capability, Achieve the effect of good resistance to high voltage power-on shock, uniform chemical composition, and guaranteed voltage resistance performance

Inactive Publication Date: 2019-12-13
DANDONG GUOTONG ELECTRONICS COMPONENTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wire-wound resistors are resistors obtained by winding resistance wires. They are bulky and cannot withstand long-term high-voltage energization. They have poor voltage resistance and are easy to burn out.
Thick film resistors are large in size, and due to process limitations, thick film resistors cannot obtain greater power in a limited space volume
[0004] At

Method used

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  • Ceramic PTC thermistor capable of resisting high pulse overload, and manufacturing method thereof
  • Ceramic PTC thermistor capable of resisting high pulse overload, and manufacturing method thereof
  • Ceramic PTC thermistor capable of resisting high pulse overload, and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Raw material molar ratio: BaCO 3 : 0.811mol, CaCO 3 : 0.189mol, TiO 2 : 1.018mol, Y 2 O 3 : 0.0029mol, Mn(NO 3 ) 2 : 0.00082mol, SiO 2 : 0.010mol, Al 2 O 3 : 0.005mol, Si 3 N 4 :0.004mol;

[0043] Put the weighed material into the ball mill jar, and perform ball milling according to the raw material: agate ball: deionized water with insulation resistance greater than 10MΩ=1:1.5:1.5, and the ball mill jar rotates at 50 rpm for 24 hours;

[0044] Dry and press the ball-milled material into a cylindrical shape, heat it up at a heating rate of 150 °C per hour in a high-temperature furnace, heat it up to 1170 °C, and keep it for 3 hours. 200℃, take out and cool to room temperature naturally;

[0045] The pre-sintered and synthesized materials are ball-milled according to the material: agate ball: deionized water = 1:1.5:1.3, the speed of the ball mill tank is 50 rpm, the time is 24 hours, and the insulation resistance of deionized water is required to be greater ...

Embodiment 2

[0052] The molar ratio of raw materials is: BaCO 3 : 0.817, CaCO 3 : 0.183, TiO 2 : 1.02, Y 2 O 3 : 0.0031, Mn (NO 3 ) 2 : 0.00084, SiO 2 : 0.013, Al 2 O 3 : 0.007, Si 3 N 4 : 0.005;

[0053] Put the weighed material into the ball mill jar, and perform ball milling according to the raw material: agate ball: deionized water with insulation resistance greater than 10MΩ=1:1.5:1.5, and the ball mill jar rotates at 50 rpm for 24 hours;

[0054] Dry and press the ball-milled material into a cylindrical shape, heat it up at a heating rate of 150 °C per hour in a high-temperature furnace, heat it up to 1170 °C, and keep it for 3 hours. 200℃, take out and cool to room temperature naturally;

[0055] The pre-sintered and synthesized materials are ball-milled according to the material: agate ball: insulation resistance greater than 10MΩ deionized water = 1:1.5:1.3, and the ball milling tank speed is 50 rpm for 24 hours;

[0056] The materials after the above-mentioned second...

Embodiment 3

[0062] The molar ratio of raw materials is: BaCO 3 : 0.825, CaCO 3 : 0.175, TiO 2 : 1.022, Y 2 O 3 : 0.0033, Mn (NO 3 ) 2 : 0.00096, SiO 2 : 0.011, Al 2 O 3 : 0.009, Si 3 N 4 : 0.004;

[0063] Put the weighed material into the ball mill jar, and perform ball milling according to the raw material: agate ball: deionized water with insulation resistance greater than 10MΩ=1:1.5:1.5, and the ball mill jar rotates at 50 rpm for 24 hours;

[0064] Dry and press the ball-milled material into a cylindrical shape, heat it up at a heating rate of 150 °C per hour in a high-temperature furnace, heat it up to 1170 °C, and keep it for 3 hours. 200℃, take out and cool to room temperature naturally;

[0065] The pre-fired and synthesized materials are ball-milled according to the material: agate balls: deionized water with insulation resistance greater than 10MΩ = 1:1.5:1.3, the speed of the ball mill tank is 50 rpm, and the time is 24 hours;

[0066] The above-mentioned materials...

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Abstract

The invention relates to a ceramic PTC thermistor capable of resisting high pulse overload, and a manufacturing method thereof, wherein the raw materials comprise: 0.811-0.825 mol BaCO3, 0.175-0.189 mol CaCO3, 1.018-1.022 mol TiO2, 0.0026-0.0035 mol Y2O3, 0.00078-0.00096 mol Mn(NO3)2, 0.010-0.018 mol SiO2, 0.005-0.01 mol Al2O3, and 0.003-0.006 mol Si3N4, and ball-milling, pre-firing synthesis, secondary ball-milling mixing, spray granulation, pressing molding, sintering, silver electrode feeding, conducting wire welding and encapsulation are performed to prepare the product. According to the present invention, the product is particularly used as the load protection PTC thermistor of the starting circuits of high-power electric equipment such as electric automobile power-on pre-charging equipment and the like, wherein the resistance value is 1300-3000 omega, the high-voltage resistance is DC750V, the number of the times of power-on pulse resistance is not less than 5 each time, and thethermistor can be normally reused ten thousand times after being powered on for 1000 h.

Description

technical field [0001] The patent of the present invention relates to a ceramic PTC thermistor resistant to high pulse overload and its manufacturing method, especially for the load protection PTC heat Sensitive resistor. [0002] technical background [0003] At present, the load protection resistors of the starting control circuits of high-power electrical equipment such as electric vehicles and charging piles are made of cement resistors, ceramic resistors, aluminum shell resistors, and thick film resistors. Wirewound resistors are resistors obtained by winding resistance wires. They are large in size and cannot withstand long-term high-voltage energization. They have poor resistance to voltage and are easy to burn out. Thick film resistors are larger in size, and due to process limitations, thick film resistors cannot obtain greater power in the case of limited space volume. [0004] At present, the existing ceramic PTC resistors are generally disc-shaped PTC resistors,...

Claims

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Application Information

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IPC IPC(8): C04B35/46C04B35/626C04B41/90H01C7/02H01C17/30
CPCC04B35/46C04B35/6261C04B35/64C04B41/52C04B41/90C04B2235/3208C04B2235/3215C04B2235/3217C04B2235/3225C04B2235/3262C04B2235/3418C04B2235/3873C04B2235/6562C04B2235/6565C04B2235/6567H01C7/023H01C17/30C04B41/5144C04B41/5116
Inventor 刘文磊孙立敏吴波刘永明张成君杨新宇
Owner DANDONG GUOTONG ELECTRONICS COMPONENTS
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