Method for preparing BaTiO3 conductive ceramic powder by taking water as medium through rare earth phase-phase permeation
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A technology of conductive ceramics and ceramic powders, which is applied in the field of synthesis of inorganic nano-functional materials, can solve problems such as high cost and unfriendly environment, and achieve the effects of preventing pollution, low cost, and reducing modification costs
Inactive Publication Date: 2012-06-20
HARBIN INST OF TECH
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[0004] The main purpose of the present invention is to solve the problem of preparing BaTiO by traditional rare earth infiltration method 3 Conductive ceramic powder requires the use of alcohol or amide organic solvents as the infiltration medium, which leads to high cost and environmental unfriendly technical defects in this method, thus providing a method for preparing BaTiO by rare earth vapor phase infiltration with water as the medium. 3 A New Approach to Conductive Ceramic Powders
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[0021] The aforementioned BaTiO 3 The ceramic powder can be obtained by any preparation method in the prior art, and can also be purchased directly from the market. This embodiment provides a kind of BaTiO prepared by sol-gel method 3 Ceramic powder, the specific preparation method is: 1, 15.326g barium acetate is dissolved in deionized water, obtains the saturated solution of barium acetate; Add 20ml of glacial acetic acid to obtain a mixed system; 3. Add the saturated solution of barium acetate dropwise to the mixed system at a rate of less than 60 drops per minute to obtain a light yellow transparent solution. Dry for 72 hours to obtain the xerogel precursor; calcinate the xerogel precursor at 800°C for 2 hours to obtain pure BaTiO 3 ceramic powder.
[0022] After testing, the obtained BaTiO 3 The room temperature resistivity of conductive ceramic powder is 2.98×10 -2 Ω·m, the average particle size is 200nm. The XRD diffraction pattern of the product is as follows ...
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Abstract
The invention discloses a method for preparing BaTiO3 conductive ceramic powder by taking water as a medium through rare earth phase-phase permeation, which relates to a synthesis method of an inorganic nanometer functional material and is used for overcoming the defects of high cost and non-environmental-friendliness existing in the conventional rare earth permeation method. In the method, waterinstead of an alcohol or amide organic solvent is taken as a permeation medium, so that cost is reduced, environmental pollution is prevented, the purity of a product is increased simultaneously, andthe repeatability of modification is enhanced. The method comprises the following specific steps of: raising the temperature of a furnace to be permeated to a set temperature of 750-900 DEG C; dripping distilled water into the furnace to exhaust air in the furnace; putting BaTiO3 ceramic powder into a permeated furnace; and dripping a permeation liquid containing rare earth elements into the furnace to obtain BaTiO3 conductive ceramic powder. The room temperature resistivity of a produced prepared with the method can be 10<-2> ohm.m, and the particle size of powder is 120-300 nanometers.
Description
technical field [0001] The present invention relates to the synthetic method of inorganic nanometer functional material, especially to a kind of preparation BaTiO by using water as the medium through rare earth gas phase diffusion and infiltration 3 Method for conductive ceramic powder. Background technique [0002] As an important functional material, powders with conductive properties are widely used in coatings, adhesives, electronics, electrical appliances, aviation, chemicals, printing, packaging, ships, military and other fields, for the production of conductive coatings, antistatic Coatings, conductive adhesives, conductive plastics, conductive rubber, conductive static paper, electronic components, electrical equipment casings, printed circuit boards, etc. However, metal powder, carbon black, graphite, carbon fiber, metal flake or fiber, and metal oxide, which are widely used at present, are limited in application due to factors such as oxidation, cost, and processi...
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