Rare earth doped barium titanate particles and preparation method thereof

A rare earth doping and barium titanate technology, which is applied in the field of barium titanate particles and its preparation, can solve the problems of product performance brittleness, application limitations, and easy oxidation

Active Publication Date: 2010-11-03
HUNAN SEEDER ELECTRONICS CERAMIC TECH IND PARK DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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 based on carbon and metal systems. This type of conductive powder has certain defects and is limited in application.
For example, although metal conductive

Method used

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  • Rare earth doped barium titanate particles and preparation method thereof
  • Rare earth doped barium titanate particles and preparation method thereof
  • Rare earth doped barium titanate particles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 51 moles of BaCO to the vertical ball mill 3 , then add 50 moles of titanium dioxide, and finally add deionized water for ball milling. The material after ball milling is directly pumped to the vacuum dryer by vacuum pump for drying. Wherein said ball mill is the QMJ200 vertical ball mill of Shanghai Hua Rock Instrument Equipment Co., Ltd. The mass ratio of barium carbonate to deionized water is 1:5, and the ball milling time of the mixed material is 120 minutes. The vacuum drying time is 45-70 minutes, and the vacuum degree is ≤-0.065Mpa.

[0027] The dried material is left for 24 hours and put into a fully automatic pusher kiln for firing. The heat treatment atmosphere is air. Push plate speed 8.5mm / min. The firing kiln used is a 20M fully automatic pusher kiln. Divided into 11 temperature zones. The fired material is crushed, pulverized and classified. Washing with deionized water and firing twice can get pure barium titanate. Grinding conditions: feed f...

Embodiment 2

[0031] Dissolve the oxides of lanthanum, praseodymium, rubidium, samarium, erbium, and gadolinium in concentrated nitric acid respectively, then heat until the oxides are decomposed, adjust the concentration with formamide reagents after cooling, and prepare a solution with a molar concentration of 0.02.

[0032] Add 51 moles of BaCO to the vertical ball mill 3 , and then respectively add lanthanum, praseodymium, rubidium, samarium, erbium, gadolinium oxide-concentrated nitric acid solution, then add 50 moles of titanium dioxide, and finally add deionized water for ball milling. The molar ratio of the rare earth ions in the oxide-concentrated nitric acid solution to the barium ions in the barium carbonate is 0.001-0.005. The material after ball milling is operated according to the conditions and steps of implementation 1.

Embodiment 3

[0034]Dissolve oxides of lanthanum, praseodymium, rubidium, samarium, erbium, and gadolinium in concentrated nitric acid respectively, then heat until the oxides are decomposed, adjust the concentration with formamide reagents after cooling, and prepare a solution with a molar concentration of 0.02.

[0035] Add 51 moles of BaCO to the vertical ball mill 3 , and then add the above-mentioned lanthanum, praseodymium, rubidium, samarium, erbium, gadolinium oxide-concentrated nitric acid solution, then add 50 moles of titanium dioxide, and finally add absolute ethanol for ball milling. The material after ball milling is directly pumped to the vacuum dryer by vacuum pump for drying. Wherein said ball mill is the QMJ200 vertical ball mill of Shanghai Hua Rock Instrument Equipment Co., Ltd. The mass ratio of barium carbonate to deionized water is 1:3, and the ball milling time of the mixed material is 120 minutes. The vacuum drying time is 45-70 minutes, and the vacuum degree is ≤-...

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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...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/626
Inventor 彭铁缆匡建波汤育才
Owner HUNAN SEEDER ELECTRONICS CERAMIC TECH IND PARK DEV CO LTD
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