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Method for high temperature quick synthesizing blender or compound titanate ceramic powder

A technology for composite titanate and ceramic powders, which is applied in the field of high-temperature rapid synthesis of doped or composite titanate ceramic powders using a vacuum arc melting furnace, which can solve the problems of unsuitable dielectric materials and devices, and unstable product quality, etc. problem, to achieve the effect of fast condensation speed, product quality stability and reproducibility, and fast speed

Inactive Publication Date: 2005-10-19
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic manufacturers generally adopt the method of directly mixing and calcining oxides. The quality of the products produced by this method is not stable enough and is not suitable for high-quality dielectric materials and devices.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment one: a kind of calcium titanate ceramics (100%CaTiO 3 -10% SiO2 2 -5%La 2 o 3 ) method; first 2.719g (0.02mol) pre-synthesized calcium titanate (CaTiO 3 ), 0.272g (4.53×10 -3 mol) silicon dioxide (SiO 2 ) and 0.136g (4.17×10 -4 mol) Lanthanum trioxide (La 2 o 3 ), fully mixed and ground, pressed into simple geometric bodies such as flakes or columns, and then put the above mixture into a copper crucible in a vacuum arc melting furnace, pass cooling water, and vacuumize to 10 -3 Atmospheric pressure, fill with argon and maintain a pressure slightly higher than one atmospheric pressure, adjust the current, ignite the arc to heat the sample, the current is 80A, and the reaction time is about 20 seconds; after the reaction is completed, turn off the power, adjust the pressure, take out the sample and grind it into a pink. The resulting product is calcium titanate ceramics (100% CaTiO2) doped with silicon oxide and lanthanum trioxide 3 -10% SiO2 2 -5%La...

Embodiment 2

[0023] Embodiment two: a kind of preparation barium titanate-metal nickel composite material (100%BaTiO 3 -10%Ni) method; is to first 4.664g (0.02mol) pre-synthesized barium titanate (BaTiO 3 ) and 0.466g (9.02×10 -3 mol) metal nickel powder (Ni), fully mixed and ground, pressed into simple geometric bodies such as flakes or columns, and then put the above mixture into a copper crucible of a vacuum arc melting furnace, pass cooling water, and vacuumize to 10 -3 Atmospheric pressure, fill with argon and maintain a pressure slightly higher than one atmospheric pressure, adjust the current, ignite the arc to heat the sample, the current is 160A, and the reaction time is about 30 seconds; after the reaction is completed, turn off the power, adjust the pressure, take out the sample and grind into powder. The resulting product is a barium titanate-metallic nickel composite material (100% BaTiO 3 -10% Ni).

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PUM

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Abstract

The present invention provides high temperature synthesizing process of blended or compound titanate ceramic powder. The method includes fully mixing titanate synthesized in advance and blended elements, grinding and tabletting, fast reaction of the mixture in argon atmosphere inside vacuum arc furnace, and grinding the reacted solid into the blended titanate ceramic powder. The present invention has simple technological process, easy operation, short reaction period, low cost, and high quality and performance of prepared blended titanate ceramic powder.

Description

technical field [0001] The invention relates to a multifunctional electronic ceramic material-a method for preparing a doped or composite titanate ceramic powder, in particular to a method for rapidly synthesizing a doped or composite titanate ceramic powder at high temperature using a vacuum arc melting furnace. technical background [0002] Perovskite titanate (mainly: BaTiO 3 , SrTiO 3 , PbTiO 3 , CaTiO 3 ) is a dielectric material and optoelectronic material with a high dielectric constant, and has the characteristics of high capacity, high dispersion frequency, low dielectric loss, and low temperature coefficient. A single titanate material has mixed electronic and ionic conductivities, making it suitable for high-temperature superconducting films, catalysis, high-temperature solid oxide fuel cell electrode materials, electrochemical sensors, various oxide film substrate materials, special optical windows and high-quality Sputtering targets and other aspects are wid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/626
Inventor 贾永忠景燕
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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