High energy type zinc oxide piezoresistor material and preparation method thereof

A varistor, zinc oxide technology, applied in the direction of varistor, varistor core, overvoltage protection resistor, etc., to achieve the effect of improving uniformity, excellent comprehensive electrical performance, and reducing leakage current

Inactive Publication Date: 2012-06-27
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the anisotropic growth of ZnO grains not only with TiO 2 It is related to the uniformity of doping, but also related to the surface orientation of the zinc oxide grain itself, therefore, improving the TiO 2 The uniformity of doping cannot completely solve the problem of anisotropic growth of zinc oxide grains during sintering. It is very important to study the preparation method of a zinc oxide varistor material with good comprehensive electrical properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 0.1% manganese carbonate, 0.01% barium carbonate and 0.001% strontium carbonate were weighed and mixed in a high-energy ball mill for dry grinding for 3 hours at a speed of 800 rpm, then calcined at 900°C for 2 hours at a heating rate of 0.1%. The calcined product was dry-milled again at 800 rpm for 3 hours in a high-energy ball mill to obtain mixture a.

[0048] According to the mole percentage, add 0.77% nanoscale amorphous metatitanic acid nanopowder, 0.1% antimony pentoxide, 0.4% bismuth trioxide, 0.39% dicobalt trioxide, 0.1% nickel trioxide, 0.001% silicon dioxide, 0.1% tin dioxide and the above mixture a, add an appropriate amount of ethanol in a high-energy ball mill to mill for 14 hours at 800 rpm, and then add 0.001% aluminum nitrate in molar percentage , 0.001% silver nitrate, 0.001% magnesium nitrate, a mass percentage of 0.05% polyacrylic acid dispersant and a mass percentage of 0.01% tributyl phosphate defoamer and continue ball milling for 6 hours at 400 ...

Embodiment 2

[0059] Be that 0.8% manganese carbonate, 0.03% barium carbonate and 0.005% strontium carbonate weigh in the high-energy ball mill after being weighed by mole percentage, 400 rev / mins of rotating speeds, then calcined 2 hours at 1000 ℃, heating rate is 5° C. / min, and the calcined product was dry-milled again in a high-energy ball mill at a speed of 600 rpm for 5 hours to obtain a mixture a.

[0060] According to the mole percentage, add 2% nano-scale amorphous metatitanic acid nano-powder and TiO to 93% sub-micron zinc oxide powder respectively 2 A mixture of nanowires (the mass ratio of the two is 3:1), 0.8% antimony pentoxide, 1.0% bismuth trioxide, 1.2% cobalt trioxide, 0.5% nickel trioxide, 0.005% silicon dioxide, 1.0 % tin dioxide and the above-mentioned mixture a, add an appropriate amount of ethanol in a high-energy ball mill with 800 rpm ball milling for 6 hours, then add 0.01% aluminum nitrate, 0.005% silver nitrate, 0.002% magnesium nitrate, and the mass percentage is...

Embodiment 3

[0071] The molar percentage is 1.0% manganese carbonate, 0.1% barium carbonate and 0.1% strontium carbonate weighed and mixed in a high-energy ball mill for dry grinding for 5 hours at a speed of 400 rpm, then calcined at 700°C for 2 hours, the heating rate The temperature was 3° C. / min, and the calcined product was dry-milled again in a high-energy ball mill at a speed of 600 rpm for 5 hours to obtain mixture a.

[0072] Add 0.05% TiO to 95% submicron zinc oxide powder according to mole percentage2 Nanorods, 0.8% antimony pentoxide, 0.1% bismuth trioxide, 2.0% cobalt trioxide, 0.3% nickel trioxide, 0.003% silicon dioxide, 0.5% tin dioxide and the above mixture a, in a high energy ball mill Add an appropriate amount of ethanol and ball mill with 800 rpm for 20 hours, then add 0.03% aluminum nitrate in molar percentage, 0.008% silver nitrate, 0.005% magnesium nitrate, the ammonium citrate dispersant of 3.0% and the mass percentage of After adding 2.0% perfluorooctanoic acid def...

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PUM

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Abstract

The invention relates to a high energy type zinc oxide piezoresistor material and a preparation method thereof, which belong to the technical field of piezoresistor material preparation. The preparation method comprises (1) enabling manganese carbonate, barium carbonate and strontium carbonate to be mixed, ball-milled and calcined to obtain mixture A; (2) enabling titanium oxide, antimony pentoxide, bismuth trioxide, cobalt oxide, nickel oxide, silica and stannic oxide to be mixed in submicron-sized zinc oxide powder to obtain mixture B which is mixed and ball-milled with the mixture A to obtain mixture C; and (3) adding aluminum nitrate, silver nitrate, magnesium nitrate, a dispersing agent and an antifoaming agent in the mixture C, ball-milling and drying to obtain high energy type zinc oxide piezoresistor composite powders which are formed in a pressing mode and sintered to obtain a high energy type zinc oxide piezoresistor. The high energy type zinc oxide piezoresistor material is simple in preparation method, prepared zinc oxide piezoresistor has high energy density, low leakage current and residual voltage ratio, batch of products is stable, acceptability is high, and the high energy type zinc oxide piezoresistor material is applicable to scale production.

Description

technical field [0001] The invention relates to a high-energy zinc oxide varistor material and a preparation method thereof, belonging to the technical field of varistor material preparation. Background technique [0002] At present, the development and application of zinc oxide-based varistor materials has become a rapidly developing field of oxide electronic ceramics technology. Its market prospect is very broad and it has far-reaching research significance. Among them, the high-energy zinc oxide varistor belongs to ZnO-Bi 2 o 3 -TiO 2 It is a varistor with high energy capacity, but its high-current performance is not ideal, especially the residual voltage of small-diameter components is relatively high, and often fails to meet the voltage limit requirements. Therefore, it is necessary to increase the potential gradient of high-energy varistors and reduce residual voltage. Voltage ratio has become a research and development trend of varistors. [0003] Ti is an unstabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/453C04B35/622H01C7/112H01C7/12
Inventor 谭强强徐宇兴
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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