Composite thermistor material based on rare earth nickel-based oxide as well as preparation method and application of composite thermistor material

A thermistor and oxide technology, applied in the direction of resistance manufacturing, resistors with negative temperature coefficient, resistors, etc., can solve the problems of low material application cost, reduce the resistivity of thermistor materials, etc., and achieve low-dimensional The effect of realizing continuous regulation and suppressing inrush current

Active Publication Date: 2021-11-26
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The technical problem solved by the present invention is how to reduce the resistivity of existing traditional thermistor materials while maintaining lower material application costs

Method used

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  • Composite thermistor material based on rare earth nickel-based oxide as well as preparation method and application of composite thermistor material
  • Composite thermistor material based on rare earth nickel-based oxide as well as preparation method and application of composite thermistor material
  • Composite thermistor material based on rare earth nickel-based oxide as well as preparation method and application of composite thermistor material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] SmNiO 3 Powder and LaMnO synthesized by solid state reaction in air atmosphere 3 The powders were mixed and ground for 24 hours according to the ratio of 8:2, 5:5, 3:7, and 2:8. The selected Φ6, Φ10, and Φ20mm particle size grinding balls were 8, 3, and 2 respectively. The speed used was 1000r / min, heated to 1000°C in the air atmosphere for 12 hours, cold pressed at 500MPa to form a block, heated to 800°C in the air atmosphere for 24 hours, and compounded to obtain a composite thermistor. Calculated by simulation in the state of no interface resistance (LaMnO 3 ) 1-x -(SmNiO 3 ) x Composite thermistor room temperature resistivity comparison example figure 1 shown. figure 1 It shows that using the above-mentioned sintering process, a decrease in resistivity can be achieved at x=0.2, 0.7, 0.8, because the interface resistance is small at these ratios, but the resistivity increases at x=0.5, because the interface resistance at this time It is necessary to reduce the...

Embodiment 2

[0089] SmNiO 3 Powder and LaMnO synthesized by solid state reaction in air atmosphere 3 The powders were mixed and ground for 24 hours according to the molar ratio of 9:1, 8:2, 7:3, 5:5, 3:7, and 2:8, and the selected grinding balls with diameters of Φ6, Φ10, and Φ20mm were 8, 3 One or two, the speed used is 1000r / min, heated to 1000°C for 12 hours in an air atmosphere, cold-pressed at 500MPa to form a block, heated to 800°C for 24 hours under an oxygen atmosphere of 60 atmospheres , to obtain a composite thermistor bulk material, which is compared with (LaMnO 3 ) 1-x -(SmNiO 3 ) x Composite thermistor room temperature resistivity comparison example figure 2 shown. figure 2 shows that using the above sintering process a decrease in resistivity can be achieved at x = 0.2, 0.3, 0.8 due to the lower interfacial resistance at these ratios, but an increase in resistivity at x = 0.1, 0.5, 0.7 due to At this time, the interface resistance is high, and it is necessary to redu...

Embodiment 3

[0093] GdNiO 3 Powder and LaMnO synthesized by solid state reaction in air atmosphere 3 The powder is mixed and ground for 1 hour according to the molar ratio of 3:1. The selected Φ6, Φ10, and Φ20mm particle size grinding balls are 10, 2, and 2 respectively. The speed used is 10000r / min, and heated to 900 ℃ for 1 hour, add 5% mass fraction of PVA binder to the obtained powder and mix evenly, cold press it under 500MPa to form a block, and heat it to 800 ℃ for 1 hour in the air atmosphere to obtain a composite heat Varistor bulk material (LaMnO 3 ) 0.25 (GdNiO 3 ) 0.75 , the resistivity drops to 0.022Ω·m and the rate of change of resistivity further increases, which strengthens the characteristics of negative temperature coefficient thermistor. GdNiO 3 The powder regulates the resistance of other thermistor materials, effectively reducing the resistivity of high-resistivity NTC thermistor materials.

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Abstract

The embodiment of the invention discloses a composite thermistor material based on a rare earth nickel-based oxide and a preparation method and application thereof, and belongs to the field of temperature sensors. The composite thermistor material comprises a rare earth nickel-based oxide and a thermistor material with a negative temperature resistance coefficient, and the resistivity of the composite thermistor material is from 10<-2> to 10<2> ohm.m. The low-resistivity composite thermistor material is obtained through interface control of two phases, electronic structure control, proportion control, mixing process control, sintering process control, and the like. Compared with the traditional thermistor material, the composite thermistor material disclosed by the invention has the characteristics of low resistivity and wide temperature range applicability, has a wide application prospect in the aspects of temperature compensation, surge current suppression and the like, and opens up a road for the development of miniaturization and low dimension of thermistors.

Description

technical field [0001] The invention belongs to the technical field of temperature sensors, and relates to a composite thermistor material based on a rare earth nickel-based oxide and a preparation method and application thereof. Background technique [0002] Sensitive components and sensors are one of the pillars of the electronic information industry, have broad development prospects, and play a decisive role in the development of the electronic industry. Negative temperature coefficient thermistor material is a material whose resistance decreases with the increase of temperature. Because of its simple structure, small size, high sensitivity, and low cost, it is widely used in temperature measurement and temperature control, electronic products, etc. Overcurrent protection and temperature compensation have become one of the indispensable electronic components in aerospace, instrumentation and other fields [1-2]. [0003] With the development of the information age, the mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/622H01C7/04H01C17/00
CPCC04B35/50C04B35/622H01C7/043H01C17/00C04B2235/3251C04B2235/3262C04B2235/6567C04B2235/6585
Inventor 陈诺夫李晓宇王郁昭张婷张豪陈吉堃李子昂崔雨晨鄢峰波李海帆
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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