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Thermal sensitive ceramic material and preparation method thereof

A technology of heat-sensitive ceramics and rare earth oxides, applied in the field of materials, can solve the problems of narrow temperature range and restricted use, and achieve the effect of wide operating temperature range, stable performance and good sensitivity performance.

Active Publication Date: 2015-01-28
常熟市董浜科技创业投资发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat-sensitive ceramic material prepared by this method has a relatively high constant B value, and has the advantage of high sensitivity in the corresponding temperature range, but due to the limitation of the material and the preparation method, the temperature range of the heat-sensitive ceramic material is relatively narrow, Only valid within a certain temperature range, thus limiting its use

Method used

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  • Thermal sensitive ceramic material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] According to the preparation method of the heat-sensitive ceramic material provided by the present invention, the heat-sensitive ceramic material is prepared, and the preparation steps are as follows:

[0029] (1) Weigh Co 3 o 4 , Fe 2 o 3 、Ni 2 o 3 , SnO 2 、TiO 2 , Li 2 O and La 2 o 3 , the purity of the material is 99.99%;

[0030] The material ratio of each component is Co:Fe:Ni:Sn:Ti:Li:La is 1:1:0.3:0.01:0.02:0.01:0.1;

[0031] (2) mixing each component together for grinding and dispersing;

[0032] (3) put the above mixture into a ball mill and carry out ball milling, and dry after mixing;

[0033] (4) After ball milling, put the mixture into a mold and perform high-temperature calcination at a temperature of 1250° C., a pressure of 4 GPa, and a time of 3 hours;

[0034] (5) After the calcination is finished, cool to room temperature with the furnace, and take it out;

[0035] (6) After performing a slicing process on the block material, the electrod...

Embodiment 2

[0037] (1) Weigh Co 3 o 4 , Fe 2 o 3 、Ni 2 o 3 , SnO 2 、TiO 2 , Li 2 O and La 2 o 3 , the purity of the material is 99.99%;

[0038] The material ratio of each component is Co:Fe:Ni:Sn:Ti:Li:rare earth is 1:3:0.7:0.05:0.05:0.03:0.3;

[0039] (2) mixing each component together for grinding and dispersing;

[0040] (3) put the above mixture into a ball mill and carry out ball milling, and dry after mixing;

[0041] (4) After ball milling, put the mixture into a mold and perform high-temperature calcination at a temperature of 1350° C., a pressure of 4 GPa, and a time of 4 hours;

[0042] (5) After the calcination is finished, cool to room temperature with the furnace, and take it out;

[0043] (6) After performing a slicing process on the block material, the electrode material is coated to obtain a heat-sensitive ceramic material.

Embodiment 3

[0045] (1) Weigh Co 3 o 4 , Fe 2 o 3 、Ni 2 o3 , SnO 2 、TiO 2 , Li 2 O, Nd 2 o 3 and Y 2 o 3 , the purity of the material is 99.99%;

[0046] The material ratio of each component is Co:Fe:Ni:Sn:Ti:Li:rare earth is 1:2:0.5:0.03:0.04:0.02:0.28;

[0047] Wherein the material ratio of Nd and Y is 0.4:1;

[0048] (2) mixing each component together for grinding and dispersing;

[0049] (3) put the above mixture into a ball mill and carry out ball milling, and dry after mixing;

[0050] (4) After ball milling, put the mixture into a mold and perform high-temperature calcination at a temperature of 1450° C., a pressure of 6 GPa, and a time of 2 hours;

[0051] (5) After the calcination is finished, cool to room temperature with the furnace, and take it out;

[0052] (6) After performing a slicing process on the block material, the electrode material is coated to obtain a heat-sensitive ceramic material.

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Abstract

The invention discloses a thermal sensitive ceramic material and a preparation method thereof, relating to the technical field of materials. The main components of the thermal sensitive ceramic material are metal oxides which include Co3O4, Fe2O3, Ni2O3, SnO2, TiO2, Li2O and rear earth oxides, wherein a molar ratio of the substances of components in the material is that the Co:Fe:Ni:Sn:Ti:Li:rear earth is 1:(1-3):(0.3-0.7):(0.01-0.05):(0.02-0.05):(0.01-0.03):(0.1-0.3). The preparation method of the thermal sensitive ceramic material comprises the following steps: weighing, grinding, ball-milling, calcining, cutting into slices and coating an electrode material. The thermal sensitive ceramic material provided by the invention as well as thermal sensitive ceramic with a negative temperature coefficient provided by the preparation method have the characteristics of wide working temperature region and high sensitivity; and moreover, the thermal sensitive ceramic material has the advantages of simple preparation process, stable material performance and capacity of being recycled, and the like.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a negative temperature coefficient heat-sensitive ceramic material and a preparation method thereof. Background technique [0002] Thermosensitive ceramics are a type of functional ceramics whose resistivity changes significantly with temperature. Within the working temperature range, ceramic materials whose zero-power resistance changes with temperature are mainly used to make thermistors, temperature sensors, heaters, and current-limiting components. [0003] Thermosensitive ceramics are divided into (1) negative temperature coefficient thermistor ceramics, referred to as NTC thermosensitive ceramics, whose resistivity decreases exponentially with increasing temperature; (2) positive temperature coefficient thermal resistance ceramics. Sensitive resistor ceramics, referred to as PTC thermosensitive ceramics, the resistivity of the thermosensitive ceramics increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/32C04B35/40C04B35/622
Inventor 翟红波杨振枢韦洪屹
Owner 常熟市董浜科技创业投资发展有限公司
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