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Thermal sensitive ceramic material, PTC (positive temperature coefficient) thermistor made from thermal sensitive ceramic material for constant temperature heating and manufacturing method of PTC thermistor

A technology of thermistor and thermal ceramics, applied in the direction of resistors with positive temperature coefficient, etc., to achieve the effect of good product added value and good market prospects

Active Publication Date: 2013-10-23
JIANGSU NEW LINZHI ELECTRONIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The surface temperature of the PTC sheet should be greater than 300°C;

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0025] Embodiment 1-3 is thermosensitive ceramic material composition:

Embodiment 1

[0027] 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:

[0028] The main crystal phase composition includes: 60 parts BaCO 3 , 12 copies of Pb 3 o 4 , 2 parts CaCO 3 , 102 parts of TiO 2 ;

[0029] Donor-acceptor dopants include: 0.01 parts La 2 o 3 , 0.02 parts of Nb 2 o 5 , 0.03 parts of Mn(NO3) 2 ;

[0030] Sintering liquid phase aids include: 0.9 parts of Al 2 o 3 and 0.5 parts SiO 2 .

Embodiment 2

[0032] 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:

[0033] The main crystal phase composition includes: 62 parts of BaCO 3 , 13 parts of Pb 3 o 4 , 1 part of CaCO 3 , 101 parts of TiO 2 ;

[0034] Donor-acceptor dopants include: 0.02 parts La 2 o 3 , 0.03 part Nb 2 o 5 , 0.02 part of Mn(NO3) 2 ;

[0035] Sintering liquid phase aids include: 1.1 parts of Al 2 o 3 and 0.2 parts SiO 2 .

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PUM

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Abstract

The invention discloses a thermal sensitive ceramic material. The thermal sensitive ceramic material comprises the following components in parts by mol: 60-62 parts of BaCO3, 12-13 parts of Pb3O4, 1-2 parts of CaCO3, 101-102 parts of TiO2, 0.01-0.02 part of La2O3, 0.02-0.03 part of Nb2O5, 0.02-0.03 part of Mn(NO3)2 and liquid-phase sintering auxiliary. The invention also discloses a PTC (positive temperature coefficient) thermistor which is made from the thermal sensitive ceramic material and used for constant temperature heating and has high surface temperature and low resistivity and a method for manufacturing the PTC thermistor. The method for manufacturing the PTC thermistor comprises the following steps of mixing the components in the designed ratio, and then carrying out wet process ball milling, pre-sintering, secondary wet process ball milling, pelleting and tabletting, sintering and post processing, thus the PTC thermistor is obtained. The PTC thermistor has the surface temperature higher than 300 DEG C and the resistivity lower than 30 ohm / cm and can be applied to an occasion with the requirements of low voltage and high temperature output.

Description

technical field [0001] The invention belongs to the field of semiconductor ceramic materials, in particular to a thermosensitive ceramic material, a high surface temperature, low resistivity thermistor for constant temperature heating made of the thermosensitive ceramic material and a method for manufacturing the thermistor method. Background technique [0002] As the application range of thermistors for constant temperature heating becomes wider and wider, various constant temperature heating thermistors on the market are relatively mature. The bottleneck limited to technology has not been well developed. The development of this PTC will have a good market prospect and product added value. To meet the above requirements, the performance of the PTC needs to meet the following standards: [0003] 1. The surface temperature of the PTC sheet should be greater than 300°C; [0004] 2. The resistivity should be small. For PTC heaters with traditional dimensions (24mm*15mm*2.45...

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