| 摘要 |
PURPOSE: Provided is a preparation method of ultrafine barium titanate(Cu-coated BaTiO3) dielectric ceramic materials for low temperature sintering by coating BaTiO3 with Cu-organic compound solution. CONSTITUTION: The preparation method of Cu-coated BaTiO3 powder is as follows: preparing a slurry by wet ball-milling ultrafine BaTiO3(>=99.9% purity) obtained by hydrothermal method, 2-5wt.%(based on the amount of BaTiO3) of Cu-organic compound, Cu-2 ethylhexanoate, and anhydrous solvent, 1-butanol; drying at 100deg.C for 12hrs.; thermal treating at 500deg.C for 2hrs. The sizes of prepared and sintered BaTiO3 powder, being obtained by firing at 800-1100deg.C for 0.5hr., are 120-130nm and 0.31-0.47micrometer, respectively. Also, the change of permittivity of sintered BaTiO3 is -14 - 52% in a range of -55 - 125deg.C.
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