Rare earth doped barium titanate particles and preparation method thereof

Abstract

The invention discloses rare earth doped barium titanate particles and a preparation method thereof. The preparation method comprises the following steps of: adding barium carbouate powder, amide reagent solution for decomposing a rare earth oxide, titanium oxide powder and absolute ethanol into a ball mill sequentially; performing ball milling on the mixture for 90+ / -30min, wherein the mol ratioof the barium carbonate to the titanium dioxide is 1.000+ / -0.020 and the mol ratio of rare-earth ions to barium ions is between 0.001 and 0.005; performing vacuum drying on materials which are subjected to the ball milling and then initially sintering the dried materials; crushing the sintered materials, washing the crushed materials by using deionized water and sintering the washed materials forthe second time; decentralizing the obtained product to obtain liquid-phase doped rare earth-barium titanate power; and then placing the rare earth-barium titanate power into an osmosis furnace to perform osmosis in nitrogen (N2) at the temperature of between 800 and 1,000 DEG C for 4h to obtain the target particles. The resistivity of the prepared doped barium titanate particles is obviously changed.

Description

Technical field:

[0001] The invention belongs to the field of semiconductor material manufacturing, and in particular relates to a barium titanate particle whose conductivity is improved by rare earth liquid phase-gas phase co-doping and a preparation method thereof. Background technique:

[0002] Conductive powder is a functional material with conductive properties made under a certain processing technology. At present, the commonly used conductive powder is mainly carbon-based and metal-based. This type of conductive powder has certain defects and is limited in application. For example, although metal conductive powder has strong conductivity and light color, it is expensive, easy to oxidize, poor in corrosion resistance and interferes with electromagnetic waves. Graphite conductive powder needs to be added in a relatively large amount, which tends to make the performance of the product brittle, and the carbon fiber is expensive. After the 1990s, composite conductive powd...

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