Preparation method for modified barium titanate ceramic dielectric material
A technology of ceramic dielectric and barium titanate, which is applied in the field of preparation of modified barium titanate ceramic dielectric materials, can solve the problem that it cannot meet the requirements of high-efficiency automation of light and miniaturized production and assembly of modules, and it is difficult to prepare high-purity, ultra-fine and granular materials. distribution, large volume of wafer ceramic high-voltage capacitors, etc., to achieve the effect of safe production process, low price and good molding process
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Embodiment 1
[0030] This embodiment provides a method for preparing a modified barium titanate ceramic dielectric material, comprising the following steps:
[0031] (1) in TiCl 4 BaCl was added to the solution 2 2H 2 O is dissolved and prepared into a Ba-Ti mixed solution with a Ba / Ti molar ratio of 1:1, and Ti in the Ba-Ti mixed solution 4+ The concentration is 0.5mol / L;
[0032] (2) Slowly drop the Ba-Ti mixed solution into H 2 C 2 o 4 In aqueous solution, the H 2 C 2 o 4 H in aqueous solution 2 C 2 o 4 The molar concentration is 1.0mol / L, the H 2 C 2 o 4 H in aqueous solution 2 C 2 o 4 with TiCl 4 The molar ratio is 2.5:1; the reaction temperature is controlled at 80°C, and when the crystal nuclei begin to form, high-level primary alcohols, polyethylene glycol, and stearic acid are added to H 2 C 2 o 4 In the aqueous solution, continue to drop the Ba-Ti mixed solution slowly. When the solution is white and turbid, speed up the addition rate of the Ba-Ti mixed soluti...
Embodiment 2
[0045] This embodiment provides a method for preparing a modified barium titanate ceramic dielectric material, comprising the following steps:
[0046] (1) in TiCl 4 BaCl was added to the solution 2 2H 2 O is dissolved and prepared into a Ba-Ti mixed solution with a Ba / Ti molar ratio of 1:1, and Ti in the Ba-Ti mixed solution 4+ The concentration is 0.1mol / L;
[0047] (2) Slowly drop the Ba-Ti mixed solution into H 2 C 2 o 4 In aqueous solution, the H 2 C 2 o 4 H in aqueous solution 2 C 2 o 4 The molar concentration is 1.5mol / L, the H 2 C 2 o 4 H in aqueous solution 2 C 2 o 4 with TiCl 4 The molar ratio is 2:1; the reaction temperature is controlled at 90°C, and when the crystal nuclei begin to form, high-level primary alcohols, polyethylene glycol, and stearic acid are added to H 2 C 2 o 4 In the aqueous solution, continue to drop the Ba-Ti mixed solution slowly, and when the solution is white and turbid, speed up the addition rate of the Ba-Ti mixed solu...
Embodiment 3
[0060] This embodiment provides a method for preparing a modified barium titanate ceramic dielectric material, comprising the following steps:
[0061] (1) in TiCl 4 BaCl was added to the solution 2 2H 2 O is dissolved and prepared into a Ba-Ti mixed solution with a Ba / Ti molar ratio of 1:1, and Ti in the Ba-Ti mixed solution 4+ The concentration is 0.8mol / L;
[0062] (2) Slowly drop the Ba-Ti mixed solution into H 2 C 2 o 4 In aqueous solution, the H 2 C 2 o 4 H in aqueous solution 2 C 2 o 4 The molar concentration is 0.5mol / L, the H 2 C 2 o 4 H in aqueous solution 2 C 2 o 4 with TiCl 4 The molar ratio is 3:1; the reaction temperature is controlled at 70°C, and when the crystal nuclei begin to form, high-level primary alcohols, polyethylene glycol, and stearic acid are added to H 2 C 2 o 4 In the aqueous solution, continue to drop the Ba-Ti mixed solution slowly. When the solution is white and turbid, speed up the addition rate of the Ba-Ti mixed solution...
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