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High-texture-degree strontium titanate (SrTiO3) thermoelectric ceramic and preparation method thereof

A technology of strontium titanate and high texture, which is applied in the field of high texture strontium titanate (SrTiO3) thermoelectric ceramics and its preparation, can solve problems such as poor thermoelectric performance, and achieve the effects of improving thermoelectric performance and simple preparation process

Active Publication Date: 2014-03-26
深圳智胜高技术发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem that the microstructure of the existing strontium titanate ceramic material is an equiaxed crystal structure and the thermoelectric performance is not good, the present invention proposes a strontium titanate thermoelectric texture ceramic and its preparation method to improve the thermoelectric performance of the strontium titanate thermoelectric material. performance

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  • High-texture-degree strontium titanate (SrTiO3) thermoelectric ceramic and preparation method thereof
  • High-texture-degree strontium titanate (SrTiO3) thermoelectric ceramic and preparation method thereof

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Embodiment 1

[0027] This embodiment is a thermoelectric textured ceramic. The thermoelectric textured ceramic is based on the microcrystalline template Sr 3 Ti 2 o 7 It is formed by mixing with matrix powder, organic solvent and binder, wherein: the microcrystalline template of textured ceramics is prepared with strontium carbonate, titanium dioxide and potassium chloride as raw materials, and the ratio is: 1.55 moles of strontium carbonate , 1 mole of titanium dioxide, the mass of potassium chloride is equal to the total mass of strontium carbonate and titanium dioxide; the matrix powder includes strontium titanate and bismuth oxide, and the mass ratio of strontium titanate to bismuth oxide is 10:1; the microcrystalline template Sr 3 Ti 2 o 7 It is 10% of the total mass of the powder; the binder is polyvinyl alcohol, and its mass is 30% of the total mass of the powder; the organic solvent is a mixture of toluene and ethanol, and its mass is 50% of the total mass of the powder. The ma...

Embodiment 2

[0047] This embodiment is a thermoelectric textured ceramic. The thermoelectric textured ceramic is based on the microcrystalline template Sr 3 Ti 2 o 7 It is formed by mixing with matrix powder, organic solvent and binder, wherein: the microcrystalline template of textured ceramics is prepared with strontium carbonate, titanium dioxide and potassium chloride as raw materials, and the ratio is: 1.55 moles of strontium carbonate , 1 mole of titanium dioxide, the mass of potassium chloride is equal to the total mass of strontium carbonate and titanium dioxide; the matrix powder includes strontium titanate and bismuth oxide, and the mass ratio of strontium titanate to bismuth oxide is 10:1; the microcrystalline template Sr 3 Ti 2 o 7 It is 15% of the total mass of the powder; the binder is polyvinyl alcohol, and its mass is 35% of the total mass of the powder; the organic solvent is a mixture of toluene and ethanol, and its mass is 55% of the total mass of the powder, of whic...

Embodiment 3

[0067] This embodiment is a thermoelectric textured ceramic. The thermoelectric textured ceramic is based on the microcrystalline template Sr 3 Ti 2 o 7 It is formed by mixing with matrix powder, organic solvent and binder, wherein: the microcrystalline template of textured ceramics is prepared with strontium carbonate, titanium dioxide and potassium chloride as raw materials, and the ratio is: 1.55 moles of strontium carbonate , 1 mole of titanium dioxide, the mass of potassium chloride is equal to the total mass of strontium carbonate and titanium dioxide; the matrix powder includes strontium titanate and bismuth oxide, and the mass ratio of strontium titanate to bismuth oxide is 5:1; the microcrystalline template Sr 3 Ti 2 o 7 It is 20% of the total mass of the powder; the binder is polyvinyl alcohol, and its mass is 40% of the total mass of the powder; the organic solvent is a mixture of toluene and ethanol, and its mass is 55% of the total mass of the powder. The mas...

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Abstract

The invention provides a high-texture-degree strontium titanate (SrTiO3) thermoelectric ceramic and a preparation method thereof, microcrystalline template Sr3Ti2O7 is mixed with a substrate powder material, an organic solvent and a binder to generate the final strontium titanate thermoelectric textured ceramic, wherein the microcrystalline template of the textured ceramic is Sr3Ti2O7 powder which is flaky in morphology and is prepared from strontium carbonate, titanium dioxide and potassium chloride as raw materials, the substrate powder material comprises nano strontium titanate and bismuth oxide, and the strontium titanate thermoelectric textured ceramic is finally obtained by ball milling pulping, tape casting, laminating, hot water isostatic pressing, cutting, sintering and grinding and polishing processes. The preparation method has the advantages that chip-type electronic component production equipment in factory in the prior art is used, the preparation process is simple, the preparation process is in line with environmental protection requirements, the texture degree of the prepared strontium titanate (SrTiO3) thermoelectric ceramic is up to 0.87, and the preparation method lays a foundation for improving the thermoelectric properties of strontium titanate thermoelectric materials.

Description

technical field [0001] The invention relates to the field of thermoelectric ceramics in material science, and is a strontium titanate (SrTiO 3 ) Thermoelectric ceramics and their preparation methods. Background technique [0002] Thermoelectric materials are a kind of green and environmentally friendly new energy materials, which have broad application prospects in thermoelectric power generation and thermoelectric refrigeration. Thermoelectric components made of thermoelectric materials have the advantages of no noise, no pollution, small size, light weight, easy maintenance, safety and reliability, etc., and are widely used in many fields such as aerospace, military defense, and civilian use. [0003] At present, most of the thermoelectric materials that have been researched relatively mature and have been partially commercialized are metal alloy semiconductor materials (Bi 2 Te 3 , PbTe, Si-Ge, etc.), this type of material has high thermoelectric conversion efficiency,...

Claims

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Application Information

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IPC IPC(8): C04B35/47C04B35/622
Inventor 高峰李金锦黄茜茜杨圣杰胡国辛张大帅
Owner 深圳智胜高技术发展有限公司