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Chip NTC thermistor and preparation method thereof

A thermistor and chip technology, applied in resistors, non-adjustable metal resistors, resistors with negative temperature coefficient, etc., can solve the problems of low precision and large investment, and achieve good process performance and simple product quality. Effect

Inactive Publication Date: 2021-01-22
新昌中国计量大学企业创新研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, due to the rapid development of these fields, especially the mobile communication and automobile industries, the requirements for chip NTC thermistors used in these industries, especially as temperature-compensated crystal oscillators, have increased significantly, and because chip NTC thermistors The production of chip NTC thermistors, especially the production of chip NTC thermistors, requires too much investment and there are many technical and technological factors. The performance of chip NTC thermistors, such as low precision, can no longer meet these requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] A chip-type NTC thermistor and a preparation method thereof, the composition of which is composed of a negative temperature coefficient (NTC) oxide thermistor powder and a casting agent carrier, and the components are composed of the following mass percentage content: NTC thermistor powder Body: 75%, casting agent carrier: 25%. and prepared as follows:

[0008] Comprise the following steps: (1) according to the above-mentioned NTC thermistor powder chemical composition Mn 0.6 Ni 0.2 co 0.2 o 4 Mix the metal salt raw materials such as manganese sulfate, nickel sulfate and cobalt sulfate respectively, add deionized water, stir fully to form a metal salt solution, add the same molar equivalent of oxalic acid aqueous solution to the stirred metal salt solution , adjust the pH value of the reaction solution with ammonia water to 7.0 to obtain the co-precipitation product, then wash, dry, and grind with deionized water to obtain a negative temperature coefficient (NTC) ox...

Embodiment 2

[0010] A chip-type NTC thermistor and a preparation method thereof, the composition of which is composed of a negative temperature coefficient (NTC) oxide thermistor powder and a casting agent carrier, and the components are composed of the following mass percentage content: NTC thermistor powder Body: 70%, casting agent carrier: 30%. and prepared as follows:

[0011] Comprise the following steps: (1) according to the above-mentioned NTC thermistor powder chemical composition Mn 0.6 Ni 0.15 co 0.15 0.1 (MgAl 2 )O 4 Mix the metal salt raw materials such as manganese sulfate, nickel sulfate, cobalt sulfate, magnesium sulfate, aluminum sulfate, etc., add deionized water, stir fully to form a metal salt solution, and add to the stirred metal salt solution The oxalic acid aqueous solution with the same molar equivalent, the pH value of the reaction solution is adjusted to 7.2 with ammonia water to obtain a co-precipitated product, and then washed with deionized water, dried, a...

Embodiment 3

[0013] A chip-type NTC thermistor and a preparation method thereof, the composition of which is composed of a negative temperature coefficient (NTC) oxide thermistor powder and a casting agent carrier, and the components are composed of the following mass percentage content: NTC thermistor powder Body: 82%, casting agent carrier: 18%. and prepared as follows:

[0014] Comprise the following steps: (1) according to the above-mentioned NTC thermistor powder chemical composition Mn 0.6 Ni 0.1 co 0.1 0.2 (MgAl 2 )O 4 Mix the metal salt raw materials such as manganese sulfate, nickel sulfate, cobalt sulfate, magnesium sulfate, aluminum sulfate, etc., add deionized water, stir fully to form a metal salt solution, and add to the stirred metal salt solution The oxalic acid aqueous solution with the same molar equivalent, the pH value of the reaction solution is adjusted to 7.8 with ammonia water to obtain a co-precipitated product, and then washed with deionized water, dried, and...

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Abstract

The invention provides a chip NTC thermistor, which consists of the following components in percentage by mass: 50-80% of NTC thermistor powder and 20-40% of a casting agent carrier, wherein the NTC thermistor powder comprises the following chemical components: Mn0.6Ni0.2-xCo0.2-x.2x(MgAl2O4, and x is equal to 0-20 mol%. According to the invention, the NTC thermosensitive fine powder is synthesized by adopting an ultrafine powder technology, the chip NTC thermistor is obtained by adopting a tape casting process, a high-precision cutting process, a sintering process and other technologies, thesize of the chip NTC thermistor is small, the size of the resistor can be 1.0 mm*0.5 mm*0.5 mm, the allowable deviation of the material constant B value is + / -1%, and the resistance value is adjustable. The preparation method is good and simple in process performance, and the product quality is easy to control.

Description

technical field [0001] The invention relates to a chip type negative temperature coefficient thermistor and a manufacturing method thereof. Background technique [0002] At present, negative temperature coefficient thermistors are widely used in temperature control, temperature detection, temperature compensation, integrated circuit protection and other occasions, among which chip NTC thermistors can be used in temperature control, Temperature detection, temperature compensation, integrated circuit protection. In recent years, due to the rapid development of these fields, especially the mobile communication and automobile industries, the requirements for chip NTC thermistors used in these industries, especially as temperature-compensated crystal oscillators, have increased significantly, and because chip NTC thermistors The production of chip NTC thermistors, especially the production of chip NTC thermistors, requires too much investment and there are many technical and tec...

Claims

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Application Information

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IPC IPC(8): H01C7/04
CPCH01C7/043
Inventor 王疆瑛张景基刘亚丕杜汇伟朱泽洁
Owner 新昌中国计量大学企业创新研究院有限公司
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