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Barium titanyl oxalate particle, method for preparing the same and method for preparing barium titanate

A technology of barium titanyl oxalate and a manufacturing method, which are applied in the preparation of carboxylate, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of high powder price, high price, complex synthesis process, etc. The effect of high performance and crystallinity

Inactive Publication Date: 2012-05-02
NIPPON CHECMICAL IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, although the hydrothermal synthesis method has the advantage of good powder properties, the synthesis process is complicated, the productivity is low because of the use of an autoclave, and the price of the powder is high, which is industrially disadvantageous.
In addition, the alkoxide method is also similar, and the handling of the starting material is difficult, and the price is high, which is industrially disadvantageous.

Method used

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  • Barium titanyl oxalate particle, method for preparing the same and method for preparing barium titanate
  • Barium titanyl oxalate particle, method for preparing the same and method for preparing barium titanate
  • Barium titanyl oxalate particle, method for preparing the same and method for preparing barium titanate

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Embodiment 1

[0092] In the aqueous solution that has added 250g oxalic acid 2 hydrates in 2154g water, mix 332g Ti concentration and be the titanium tetrachloride aqueous solution of 2.56mol / L, make oxalic acid be 0.79mol / L, Ti be 0.26mol / L and mix oxalic acid and tetrachloride in water An aqueous solution (A1 liquid) obtained by titanium chloride. That is, the molar ratio of the oxalate ion to the Ti element in the A1 liquid was 3.1. Separately, 195 g of barium chloride was dissolved in 963 g of water to prepare an aqueous barium chloride solution (B1 liquid) with Ba of 0.80 mol / L. Next, pure water was added to the reaction container, and the temperature was maintained at 35° C., and the A1 liquid and the B1 liquid were supplied to the reaction container at a rate of 0.9 L / hour and 0.4 L / hour while stirring. That is, the ratio of the supply rate of the Ba element to the supply rate of the Ti element to the reaction vessel was 1.3, and the residence time of the formed barium titanyl oxala...

reference example 1

[0101] Barium titanyl oxalate particles were obtained by performing the reaction under the same operation and conditions as in Example 1, except that the production reaction of barium titanyl oxalate was set at 55°C. In addition, as a result of calculating the reaction rate of Ba and Ti in the same manner as in Example 1, Ba was 70% and Ti was 95%.

[0102] Therefore, compared with Example 1, it can be seen that there are many components of Ba and Ti remaining unreacted, and the reaction efficiency and yield are lowered.

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Abstract

A barium titanium oxalate particle, a manufacturing method thereof, a manufacturing method of barium titanate are provided to increase yielding rate by proceeding consecutive reactions within specific temperature range. A manufacturing method of A barium titanium oxalate particle comprises the following steps: supplying aqueous solution which can be obtained by mixing oxalic acid and (TiSl4) titanium tetrachloride with water and barium chloride aqueous solution to a reactor(1); discharging the reacting solution(3) from the reactor; and proceeding manufacturing reaction of barium titanium oxalate at 50deg.C. The barium titanium oxalate stays in the reactor for 1-60 minutes. The barium titanium oxalate particle has average particle diameter of 0.1-50micro meters.

Description

technical field [0001] In particular, the present invention relates to barium titanyl oxalate particles useful as raw materials for functional ceramics such as piezoelectrics, optoelectronic materials, dielectrics, semiconductors, and sensors, a method for producing the same, and a method for producing barium titanate using the same. Background technique [0002] Conventionally, barium titanate has been produced by a solid-phase method, a hydrothermal synthesis method, an alkoxide method, an oxalate method, or the like. [0003] In the solid phase method, because it is produced by a dry method of mixing constituent raw material powders, etc., and heating the mixture at a high temperature, the obtained powder becomes an irregularly shaped aggregate. In addition, in order to achieve the desired characteristics, high temperature must firing. In addition, although the hydrothermal synthesis method has the advantage of good powder properties, the synthesis process is complicated...

Claims

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Application Information

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IPC IPC(8): C07C55/07C07C51/41C01G23/00
CPCC01G23/04C01P2004/03C01P2004/60C04B35/64C04B2235/3232C07F7/28
Inventor 井上秀树稗田丰彦
Owner NIPPON CHECMICAL IND CO LTD
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