A kind of preparation method of barium titanate powder
A barium titanate powder, volume ratio technology, applied in titanate, alkaline earth metal titanate, chemical instruments and methods, etc., can solve the problem of difficult to prepare high-purity, ultra-fine, particle size distribution, etc. Low price, safe production process, and the effect of reducing manufacturing costs
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Embodiment 1
[0024] The present embodiment provides a kind of preparation method of barium titanate powder, comprises the following steps:
[0025] (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;
[0026] (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 solution. After the add...
Embodiment 2
[0035] The present embodiment provides a kind of preparation method of barium titanate powder, comprises the following steps:
[0036] (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;
[0037] (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 solution, after the add...
Embodiment 3
[0046] The present embodiment provides a kind of preparation method of barium titanate powder, comprises the following steps:
[0047] (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;
[0048] (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. After the addit...
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