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Novel linear resistor material and preparation method thereof

A technology of resistivity and ceramic materials, applied in the field of new linear resistance ceramic materials, can solve the problems of resistance change of resistors, high resistance temperature coefficient of materials, low power capacity, etc.

Active Publication Date: 2017-07-14
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it has the following disadvantages: carbon is easy to oxidize in a high temperature environment, the resistance value of the resistor will change greatly, the power capacity per unit volume is low and the temperature resistance coefficient of the material is high

Method used

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  • Novel linear resistor material and preparation method thereof
  • Novel linear resistor material and preparation method thereof
  • Novel linear resistor material and preparation method thereof

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preparation example Construction

[0036] The preparation method of the ceramic material of the present invention can be a traditional oxide synthesis and sintering process. Hereinafter, as an example, its preparation method will be specifically described.

[0037] First, the ingredients. Specifically, pressing the Ba (1-x) A x Ti (1-y) B y o 3 , the stoichiometric ratio of +zC accurately weighs the oxides and / or carbonates of Ba, A, Ti, B elements (such as Nb 2 o 5 、BaCO 3 、TiO 2 , PbO, Bi 2 o 3 , Y 2 o 3 , La 2 o 3 , MnO 2 、WO 3 etc.), and C. The raw materials used can be CP or AR grade.

[0038] Next, fully mix the oxides and / or carbonates of Ba, A, Ti, and B elements, for example, by ball milling. In addition, when mixing these raw materials, it is also possible to add 0 to 10 mol% bismuth oxide and / or lead oxide (relative to Ba (1-x) A x Ti (1-y) B y o 3 ), which is in the liquid phase during subsequent sintering. When ball milling and mixing, anhydrous ethanol can be used as a med...

Embodiment 1

[0046] According to the general formula Ba (1-x) A x Ti (1-y) B y o 3 , +zC, x=0.005, y=0.04, z=0.08, A is 0.005mol Ca, B is 0.04mol Nb, C is 0.08mol SnS, using CP or AR grade chemical reagent Nb 2 o 5 、BaCO 3 、TiO 2 , SnS, CaCO 3 As the raw material, after fully drying, weigh according to the stoichiometric formula above.

[0047] Using absolute ethanol as the medium, the weighed BaCO 3 、TiO 2 Mix with raw materials A and B by ball milling for 3 hours. Dry, sieve, and synthesize the powder in a corundum crucible at 850°C / 2 hours. Then crush and sieve, mix in the pre-weighed C, ball mill for 3 hours, dry, add binder, dry press molding, after plastic discharge, use nitrogen to sinter at 1150°C for 3 hours. After testing, it can be seen that its resistivity is about 1300Ω·cm (see figure 2 ).

Embodiment 2

[0049] According to the general formula Ba (1-x) A x Ti (1-y) B y o 3 , +zC take x=0.002, y=0.07, z=0.05, A is 0.002mol La, B is 0.07mol Mn, C is 0.05mol PbS, 0.05mol% PbO is used as the liquid phase sintering material, using CP or AR grade The chemical reagent La 2 o 3 、BaCO 3 、TiO 2 , PbO, MnO 2 , PbS as the raw material, after fully drying, according to the above formula stoichiometric weighing.

[0050] Using absolute ethanol as the medium, the weighed BaCO 3 、TiO 2 , PbO and A and B raw materials were ball milled and mixed for 4 hours. Dry, sieve, and synthesize the powder in a corundum crucible at 900°C / 2 hours. Then crushed and sieved, mixed with pre-weighed C, ball-milled for 6 hours, dried, added with binder, dry-pressed and molded, and sintered with nitrogen after plastic discharge. After testing, it can be seen that the material presents a phenomenon of perovskite structure and lead metal mixing (see figure 1 ), and when the electric field strength is ...

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Abstract

The present invention relates to a novel linear resistor material and a preparation method thereof, wherein the general formula of the ceramic material is Ba(1-x)AxTi(1-y)ByO3+zC, z represents that 1 mol of Ba(1-x)AxTi(1-y)ByO3 is doped with z mol of C, x is more than or equal to 0 and is less than 1, y is more than 0 and is less than or equal to 0.5, z is more than 0 and is less than or equal to 0.5, A is at least one selected from La, Sr, Y, Pb, Ca, Na and K, B is at least one selected from Mn, W, Nb, Ni, Ta and Mo, and C is at least one selected from SnS, PbS, Ag2S, Ag2O and Al2O3. According to the present invention, the resistivity of the ceramic material varies within 10-10<4> omega.cm, and the resistivity change does not exceed 10% within a temperature range of -50-150 DEG C.

Description

technical field [0001] The invention relates to a series of novel linear resistance ceramic materials with high resistivity and high temperature stability. It can be used in signal processing, electronic circuits, pulse power and other fields. Background technique [0002] Resistor is an electronic component widely used in electronic-power systems, and has a long history of application and development. With the rapid development of electronic-power systems, resistors have developed from being used as simple current-limiting components in circuits to electronic components with dozens of functions today. Among them, the pulse power resistor is a kind of resistor in the resistor family. Its main function is to absorb super high power energy in an instant and in a short time, and protect the electronic circuit communication system from being damaged. The existing pulse power resistors can be classified into metal alloy type, clay-Al 2 o 3 -Carbon and ZnO ceramic pulse power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468H01C7/00
CPCC04B35/4682C04B35/4684C04B2235/3208C04B2235/3213C04B2235/3215C04B2235/3227C04B2235/3232C04B2235/3251C04B2235/3258C04B2235/3267C04B2235/3296C04B2235/446C04B2235/602C04B2235/656C04B2235/6567H01C7/00
Inventor 李国荣阮伟曾江涛郑嘹赢阮学政满振勇
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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