Nanocrystalline barium titanate-carbon composite powder and preparation method thereof

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 ...

AI Technical Summary

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 preparation method; the prepared nanocrystalline barium titanate-carbon composite powder The powder interface is well bonded, which can avoid the problem of too large barium titanate grains and uneven dispersion of carbon in barium titanate powder

Images