Nanocrystalline barium titanate-carbon composite powder and preparation method thereof

A carbon composite powder, crystalline barium titanate technology, applied in the field of nanocrystalline barium titanate-carbon composite powder and its preparation, can solve the problems of uneven carbon dispersion, excessively large barium titanate grains, etc. Good combination, fine distribution, easy to industrialize effect

Inactive Publication Date: 2010-09-01
WUHAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to overcome the defects of the prior art, and the purpose is to provide a nanocrystalline barium titanate-carbon composite powder with simple process and easy industrial production and its preparati...

Method used

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  • Nanocrystalline barium titanate-carbon composite powder and preparation method thereof
  • Nanocrystalline barium titanate-carbon composite powder and preparation method thereof
  • Nanocrystalline barium titanate-carbon composite powder and preparation method thereof

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Embodiment 1

[0020] A nanocrystalline barium titanate-carbon composite powder and a preparation method thereof. Analytical pure BaCO 3 and metal titanium powder as raw materials, and mix them at a molar ratio of 1:1; then put the above mixed raw materials and steel balls into a stainless steel ball mill tank according to the mass ratio of the mixed raw materials and steel balls at a mass ratio of 1:50 to 1:70, and seal them. Vacuum to -0.05MPa, and then place it on a planetary ball mill for 80-120 hours to obtain nanocrystalline BaTiO 3 -C composite powder.

Embodiment 2

[0022] A nanocrystalline barium titanate-carbon composite powder and a preparation method thereof. Analytical pure BaCO 3 and metal titanium powder as raw materials, mixed with a molar ratio of 1:1, plus 0.1-3% of the total mass of the above-mentioned raw materials of metal nickel powder, mixed evenly, called mixed raw materials.

[0023] Then put the mixed raw materials and steel balls into a stainless steel ball mill tank according to the mass ratio of mixed raw materials and steel balls of 1:30 to 1:50, seal it, vacuumize it to -0.05MPa, and fill it with CO 2 gas, and then placed on a planetary ball mill for 60-100 hours to obtain nanocrystalline BaTiO 3 -C composite powder.

Embodiment 3

[0025] A nanocrystalline barium titanate-carbon composite powder and a preparation method thereof. Analytical pure BaCO 3 and metal titanium powder as raw materials, mixed with a molar ratio of 1:1, plus 0.1-3% of the total mass of the above-mentioned raw materials of metal iron powder, mixed evenly, called mixed raw materials. All the other are with embodiment 2. Nanocrystalline BaTiO 3 -C composite powder.

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Abstract

The invention relates to nanocrystalline barium titanate-carbon composite powder and a preparation method thereof. The invention adopts a technical scheme that: the preparation method comprises the following steps of: mixing analytically pure BaCO3 and titanium powder serving as raw materials in a molar ratio of 1:1, adding 0 to 10 percent of nickel powder, 0 to 10 percent of iron powder and 0 to10 percent of carbonyl nickel powder based on the total mass of the raw materials into the mixture, and uniformly mixing to obtain a mixed raw material; and filling the mixed raw material and steel balls in a mass ratio of 1:30-1:70 into a stainless steel ball milling jar, sealing, vacuumizing to -0.05MPa or charging one of high-purity argon, high-purity hydrogen and CO2 into the stainless steel ball milling jar after vacuumizing to -0.05MPa, and performing ball milling for 10 to 120 hours on a planet ball mill to obtain the nanocrystalline BaTiO3-C composite powder. The preparation method has the characteristics of simple process and easy industrialization. The prepared nanocrystalline barium titanate-carbon composite powder is uniformly dispersed and is good in interfacial bond strength. The crystalline particle size is nanoscale.

Description

technical field [0001] The invention belongs to the technical field of barium titanate-carbon composite powder. Specifically relates to a nanocrystalline barium titanate-carbon composite powder and a preparation method thereof. Background technique [0002] Barium titanate ceramics are the basic matrix raw materials for electronic ceramic materials, and are known as the pillar of the electronic ceramic industry. It has a high dielectric constant, excellent ferroelectricity, piezoelectricity, withstand voltage and insulation properties, and has no pollution to the environment. Therefore, it has been widely used in the fields of electronics, thermals, acoustics, optics, etc. It is mainly used to produce high-dielectric ceramic capacitors and other electronic components, such as used in color TV demagnetizers, over-current protectors, and self-temperature control heating systems. , especially the preferred dielectric material for multilayer ceramic capacitors (MLCC). At the ...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/52C04B35/626
Inventor 柯昌明刘晓倪月娥
Owner WUHAN UNIV OF SCI & TECH
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