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MMC-based negative temperature coefficient power-type NTCR novel thermistor element

A thermistor element, negative temperature coefficient technology, applied in the field of electronics, can solve the problems of high price, lack of market competitiveness, high production cost, etc., and achieve the effect of low price, low cost and scientific formula

Inactive Publication Date: 2012-10-10
韩城市微晶电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Ni2O3 and CoO are rare metal oxides, their prices are relatively expensive, the production cost is said to be high, and they lack market competitiveness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] specific implementation plan

[0009] 1. Selection of raw materials:

[0010] The raw material standards for purchase are: manganese oxide ≥ 99.2%, magnesium oxide is high-purity ultra-fine grade, copper oxide ≥ 99.5%; calcium oxide ≥ 99.8%; polyvinyl alcohol is low alkaline, the concentration of the aqueous solution is 8%, and the glue The ratio is 13kg: 1500ml; lead-free NTC silver paste contains 95% silver; lead-free tin bar contains 96% tin; silicon oxide and calcium oxide are both AR grade, of which silicon oxide ≥ 99.6%; tinned steel wire diameter is 0.8mm , Silicone encapsulation material 56%.

[0011] 2. MMC-based negative temperature coefficient power type NTCR new thermistor element manufacturing process

[0012] Firstly pretreat the purchased magnesia, manganese oxide, copper oxide and combustion promoter silicon oxide and calcium oxide in a furnace body at 300°C for 30 minutes according to the formula ratio, and then pulverize them through a 500-mesh sieve...

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PUM

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Abstract

An MMC-based negative temperature coefficient power-type NTCR novel thermistor element of the invention relates to a novel thermistor element; raw materials comprise magnesium oxide, manganese dioxide and the like; the method for processing the MMC-based negative temperature coefficient power-type NTCR novel thermistor element comprises the following five processes: presintered material processing and pulverization, water addition and ball milling, drying and blank making, sintering and silver paste brushing, and lead welding; the product has a scientific formula, standard processing technology, and stable efficacy; expensive nickel and cobalt materials are substituted by manganese, copper, and magnesium; and the production cost is reduced by about 60%.

Description

Technical field [0001] The invention discloses an MMC-based negative temperature coefficient power type NTCR novel thermistor element, which belongs to the field of electronic technology, and in particular relates to a negative temperature coefficient power type thermistor element. Background technique [0002] Power NTC negative temperature coefficient thermistors are widely used in power circuits of various switching power supplies, motors and other electronic products to suppress surge currents. Because of its simple use and low cost, it has developed into an irreplaceable protection component. Through the research on the mechanism of NTC effect and on micropowder engineering and microstructure, we can promote the development and utilization of new materials and new components, and make NTC thermistors develop towards high performance, small resistance and miniaturization. In recent years, with the increase in the export of electronic products, the demand for NTC thermis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/04C04B35/01C04B35/622C04B41/88
Inventor 牛顺祥段世昌曹全喜
Owner 韩城市微晶电子材料有限公司