NTC thermistor

Abstract

The invention belongs to the field of thermistors. According to a technical scheme in the invention, the NTC thermistor comprises the following components in percentage by weight: 60 to 65% of manganous manganic oxide (Mn3O4), 1.4 to 1.9% of cobaltosic oxide (Co3O4), 5 to 5.5% of nickel protoxide (NiO), 15 to 25% of copper oxide (CuO), 2 to 3% of zirconium oxide (ZrO2), 2 to 3% of lanthanum oxide(La2O3) and 1 to 2% of iron oxide (Fe2O3). The NTC thermistor of the invention has the following beneficial effects: sintering temperature is reduced; the obtained low-resistance NTC thermistor is uniform in resistance value and density and good in stability;e energy consumption is saved; the bending strength of the NTC thermistor is improved by adding zirconium oxide and lanthanum oxide; the problem of low bending strength of the NTC thermistor is solved while a low-resistance product is obtained; the electrical performance characteristics of the NTC thermistor product are improved; and the NTC thermistor can be applied to industrial mass production.

Description

technical field [0001] The invention belongs to the field of thermistors, in particular to the field of low-resistance formulations of negative temperature coefficient NTC thermistors. Background technique [0002] In recent years, with the advent of intelligence in the field of home appliances, the requirements for domestic NTC resistor products are high temperature resistance, high precision (resistance value and B value accuracy ±1%), short response time, and high reliability. At present, the main directions of efforts are: a. seeking ceramic formulations with simple preparation methods, good performance of components and low cost; b finely controlling the production process; . [0003] NTC thermistors currently on the market have the following deficiencies: [0004] One is that there is a single type of low resistance, and the chip strength is low. During production and transportation, it is easy to break, poor in compactness, and poor in stability. [0005] The secon...

AI Technical Summary

Problems solved by technology

[0007] The NTC thermistor technical problem that the present invention mainly solves is: optimize the formula of the low resistance value of NTC thermistor, introduce new oxide (copper oxide, zirconium oxide, lanthanum oxide) in the formula to adjust thermistor From the perspective of formula, it fundamentally solves the problem of high residual resistance of thermistor and low chip strength, and the reliability of the product is more stable. It is less dependent on the product preparation process and can realize mass production in the factory. Automated production, suitable for customers to choose different formula systems according to different specifications, with a wide range of applications