Thermal sensitive ceramic material and high-voltage-resistant thermistor prepared by using thermal sensitive ceramic material and preparation method

A technology of thermistors and thermal ceramics, which is applied in the field of high-voltage thermistors, thermal ceramic materials, and the manufacture of thermistors, and can solve the problems that communication protection products cannot meet the requirements at the same time.

Active Publication Date: 2012-08-01
JIANGSU NEW LINZHI ELECTRONIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The current communication protection products on the market cannot meet the above 6 requirements at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0034] Embodiment 1-3 is thermosensitive ceramic material composition:

Embodiment 1

[0036] According to the mole fraction, the main crystal phase component, the acceptor main dopant and the sintering liquid phase auxiliary agent are mixed in the following ratio:

[0037] The main crystal phase composition includes 86.2 parts of BaCO 3 , 3.5 parts of SrCO 3 , 4.8 parts of PbO, 5.5 parts of CaCO 3 , 101 parts of TiO 2 ;

[0038] Donor-acceptor dopant including 0.1 part Y 2 o 3 , 0.03 parts of Sb 2 o 3 , 0.06 part of Mn(NO 3 ) 2 ;

[0039] Sintering liquid phase aids include 1 part SiO 2 and 1.3 parts Al 2 o 3 .

Embodiment 2

[0041] According to the mole fraction, the main crystal phase component, the acceptor main dopant and the sintering liquid phase auxiliary agent are mixed in the following ratio:

[0042] The main crystal phase composition includes 87.2 parts of BaCO 3 , 4.5 parts of SrCO 3 , 3.8 parts of PbO, 6.5 parts of CaCO 3 , 101.5 parts of TiO 2 ;

[0043] Donor-acceptor adulterants include 0.15 parts Y 2 o 3 , 0.04 parts of Sb 2 o 3 , 0.08 part of Mn(NO 3 ) 2 ;

[0044] The sintering liquid phase aid includes 2 parts SiO 2 and 2 parts Al 2 o 3 .

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Abstract

The invention discloses a thermal sensitive ceramic material which comprises the following components in parts by mole: 86.2-87.2 parts of BaCO3, 3.5-4.5 parts of SrCO3, 3.8-4.8 parts of PbO, 5.5-6.5 parts of CaCO3, 101-101.5 parts of TiO2, 0.1-0.15 parts of Y2O3, 0.03-0.04 part of Sb2O3, 0.06-0.08 part of Mn(NO3)2 as well as a sintered liquid phase additive. The invention also discloses a high-voltage-resistant PTC (positive temperature coefficient) thermistor prepared by using the thermal sensitive ceramic material and a preparation method of the PTC thermistor. The method comprises the following steps: mixing the components according to the designed ratio, ball milling by a wet method, pre-sintering, ball milling by a secondary wet method, pelleting and tabletting, sintering and post processing, thereby preparing the PTC thermistor. Through various tests, the PTC thermistor can resist a 10/700 mu S lightening stroke wave of 4kV, and can be applied to systems such as large instruments, devices, electric power.

Description

technical field [0001] The invention belongs to the field of semiconductor ceramic materials, and in particular relates to a heat-sensitive ceramic material, a high-voltage-resistant thermistor made of the heat-sensitive ceramic material and a method for manufacturing the thermistor. Background technique [0002] With the advancement of optical fiber communication technology, a high-voltage resistant PTC (Positive Temperature Coefficient, positive temperature coefficient thermistor) is required for telecom voice line card protection, which must meet the following performance indicators: [0003] 1. The PTC itself can withstand 4KV, 10 / 700uS / 40Ω impact 10 times, the interval time is 60S, and the PTC cannot produce flashover or splinter; [0004] 2. Under the condition of 4KV, 10 / 700uS / 40Ω impact, the maximum loop current is less than 60Ap, that is, the minimum equivalent resistance R under the varistor effect of PTC min About 22Ω; [0005] 3. Power line induction test under...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622H01C7/02
Inventor 石永丰
Owner JIANGSU NEW LINZHI ELECTRONIC TECH CO LTD
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