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Lu203 rare earth element modified NTC semiconductor ceramic thermosensitive chip material with high temperature resistance and high reliability

A chip material, heat-sensitive technology, applied in the field of resistance materials, can solve problems such as drift, difficulty in stability, temperature error, etc., achieve stable resistance and B value, improve high temperature resistance performance and reliability, temperature resistance and reliability Improved effect

Inactive Publication Date: 2020-03-27
ZHAOQING EXSENSE ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the instantaneous high temperature of current heating electronic products, such as electronic cigarettes, capsule coffee machines, and high-temperature ovens, can reach 330°C to 350°C. It is difficult for existing thermistor chips to maintain stability and work normally at this high temperature, and , its resistance value will drift seriously with the use time, usually exceeding 10%, which causes a large error in the measured temperature, and in severe cases, it will lead to misjudgment, so that the heater will continue to operate after the actual temperature reaches the preset temperature. heating, or stop heating before the actual temperature reaches the preset temperature

Method used

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  • Lu203 rare earth element modified NTC semiconductor ceramic thermosensitive chip material with high temperature resistance and high reliability
  • Lu203 rare earth element modified NTC semiconductor ceramic thermosensitive chip material with high temperature resistance and high reliability
  • Lu203 rare earth element modified NTC semiconductor ceramic thermosensitive chip material with high temperature resistance and high reliability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Lu in this example 2 o 3 The composition of the modified NTC thermosensitive chip material by weight is as follows:

[0024] 25 parts of manganese dioxide, 30 parts of ferric oxide, 35 parts of tricobalt tetroxide, 5 parts of silicon dioxide, 5 parts of zinc, and 5 parts of dilutetium oxide.

[0025] Use this material to prepare NTC thermistor chips, such as figure 1 As shown, the thermistor chip 10 includes a thermosensitive ceramic substrate 11 and two electrodes 12 respectively arranged on both surfaces of the thermosensitive ceramic substrate 11, and the thermosensitive ceramic substrate 11 is made of this material, so The electrode 12 is made of metal, such as silver.

[0026] Such as image 3 Shown, utilize this material to prepare the method for NTC thermistor chip and comprise the steps:

[0027] (1) After mixing the raw materials according to the formula, ball milling, drying, sieving, grinding, drying, and sieving are carried out in sequence to obtain the...

Embodiment 2

[0033] Lu in this example 2 o 3 The composition of the modified NTC thermosensitive chip material by weight is as follows:

[0034] 60 parts of manganese dioxide, 35 parts of tricobalt tetroxide, 3 parts of nickel oxide, 2 parts of aluminum oxide, and 5 parts of dilutetium oxide.

[0035] In this embodiment, the structure and preparation method of the NTC thermistor chip made of this material are the same as those in Embodiment 1.

Embodiment 3

[0037] Lu in this example 2 o 3 The composition of the modified NTC thermosensitive chip material by weight is as follows:

[0038] 65 parts of manganese dioxide, 10 parts of tricobalt tetroxide, and 25 parts of nickel trioxide.

[0039] In this embodiment, the structure and preparation method of the NTC thermistor chip made of this material are the same as those in Embodiment 1.

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Abstract

The invention relates to a Lu2O3 rare earth element modified NTC semiconductor ceramic thermosensitive chip material with high temperature resistance and high reliability. The material provided by theinvention consists of an NTC (Negative Temperature Coefficient) thermistor material and lutetium trioxide, wherein the mass ratio of the lutetium trioxide to the NTC thermistor material is (1-5): 100. Lutetium trioxide is added into the NTC thermistor material for modification, so that the high temperature resistance and reliability of the thermistor chip are improved. The invention also relatesto a thermistor chip prepared from the material and a preparation method of the thermistor chip.

Description

technical field [0001] The invention relates to the technical field of resistance materials, in particular to a Lu 2 o 3 Modified NTC thermosensitive chip material. Background technique [0002] The thermistor chip has the characteristic that the resistance value changes with the change of temperature, and the temperature of the position where the thermistor chip is located can be determined through the resistance value of the thermistor chip, thereby realizing the function of temperature detection. The existing thermistor chip is made of high-temperature sintered metal oxide to form a ceramic structure, and then made by printing electrodes, scribing and other processes. [0003] The NTC thermistor chip made of existing semiconductor ceramic materials, after glass encapsulation and sintering, has a normal operating temperature range of about -40°C to 250°C, and its stability can only be maintained up to 250°C. However, the instantaneous high temperature of current heating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/04H01C17/00
CPCH01C7/04H01C7/043H01C17/006
Inventor 黄俊维段兆祥杨俊唐黎民柏琪星
Owner ZHAOQING EXSENSE ELECTRONICS TECH
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