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Inorganic functional ceramic PTC thermal resistance and low-temperature production process

A technology for functional ceramics and thermistors, applied in the field of low-temperature firing material formulation and its manufacturing process, can solve the problems of poor consistency, high cost, high energy consumption, etc. Effect

Inactive Publication Date: 2014-03-26
陕西华龙敏感电子元件有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the manufacturing process of traditional PTCR thermistor elements, the synthesis temperature of the base material is 1100-1200°C, and the holding time is about 125min; the firing temperature of the ceramic element is 1270-1370°C, so there is high energy consumption, high cost and high temperature firing. Defects such as poor performance and difficulty in mastering the process
The processed PTCR thermistor has a low temperature coefficient of ceramic resistance. The performance of the PTCR thermistor made with this PTCR formula and firing process is unstable. The Curie temperature from 0°C to 400°C cannot be adjusted arbitrarily, and High energy consumption and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0006] 1. Purchase of raw materials

[0007] The raw materials used are: BaCO 3 , SrCO 3 , Pb 3 o 4 , CaCO 3 、TiO 2 , Y 2 o 3 , Sb 2 o 3 、 Ta 2 o 5 , Nb 2 o 5 , PbO, Al 2 o 3 , Li 2 o 3 , v, BN, Si, Ag, MnO 2 , Ce, La. where BaCO 3 , SrCO 3 , Pb 3 o 4 , CaCO 3 、TiO 2 , PbO, Al 2 o 3 , Li 2 o 3 , v, BN, Si, Ag have a purity of ≥99.8. Y 2 o 3 , Sb 2 o 3 、 Ta 2 o 5 , MnO 2 , Ce, La purity is ≥ 99.95.

[0008] Second, one-time ingredient firing

[0009] Ba: Sr: Pb: Ca: Ti: Y: Sb: Ta: Nb = 0.685: 0.015: 0.085: 0.215: 1.0103: 0.002: 0.001: 0.001: 0.001 according to the molar ratio to calculate the exact amount of material, weighing, According to the ratio of material: water: ball = 1: 1.2: 2.5, mix the ball mill for 4 hours and discharge the material. After the material is discharged, it is dried at 150°C for 3 hours. The time at ℃ is 30 minutes. When it is increased to 800 ℃, it is kept for 125 minutes, and then the temperature is lowered by 10...

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PUM

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Abstract

The invention relates to an inorganic functional ceramic PTC thermistor and a low-temperature production process thereof, which not only provides a resistance element with excellent properties for the electronic industry, but also adopts a low-temperature sintering production process. The machining process of the inorganic functional ceramic PTC thermistor is divided into a segment of proportioning for the first time and presintering for pulverization, a segment of proportioning for the second time and presintering for granulation, a segment of preforming and firing and a segment of testing chips. The production process is scientific and novel in formulation, can form good solid phase reaction at a synthesis temperature of 800 DEG C, and can finish firing a product at 900 DEG C, thereby having the advantages of ensuring remarkable effects of saving energy and reducing consumption, greatly reducing cost and allowing the product to obtain a higher quality standard.

Description

Technical field [0001] The invention relates to an inorganic functional ceramic PTC thermistor and a low-temperature production process thereof, which relate to the field of electronic equipment, in particular to a low-temperature firing material formula and a manufacturing process of functional ceramics with positive temperature coefficient thermistor characteristics. Background technique [0002] PTCR thermistors are widely used because of their over-current, over-voltage, over-temperature protection functions in electronic circuits. In the manufacturing process of traditional PTCR thermistor elements, the synthesis temperature of the base material is 1100-1200°C, and the holding time is about 125min; the firing temperature of the ceramic element is 1270-1370°C, so there is high energy consumption, high cost and high temperature firing. Poor performance, difficult to master the process and other defects. The processed PTCR thermistor has a low temperature coefficient of c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/468C04B35/622H01C7/02
Inventor 陈玉富牛顺祥曹全喜赵丽丽牛多
Owner 陕西华龙敏感电子元件有限责任公司