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Preparation method of Ti-CA-EG water solution

A technology of aqueous solution and nitric acid aqueous solution, which is applied in the field of ceramic compositions, can solve the problems of limited application range, easy hydrolysis reaction of butyl titanate, and high cost, and achieve the effect of reducing production cost

Inactive Publication Date: 2014-07-02
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the traditional process of preparing barium titanate-based ceramic materials by the sol-gel method, butyl titanate is used as the titanium source, which is expensive, and butyl titanate is prone to hydrolysis, which limits its application range.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) 6.4g titanium dioxide (TiO 2 ) powder into 30ml of hydrofluoric acid (HF), heated in a water bath at 85°C until TiO 2 all dissolved;

[0019] (2) Add ammonia water to the solution in step (1) to neutralize and generate metatitanic acid precipitation;

[0020] (3) Suction filter and wash the metatitanic acid precipitate in step (2), then add the metatitanic acid into 20ml of nitric acid, stir magnetically until the precipitate is completely dissolved, and obtain a titanium nitrate solution;

[0021] (4) Add 50g of citric acid to the titanium nitrate solution in step (3), and stir magnetically at 60°C to completely dissolve the citric acid; then add 20ml of ethylene glycol solution to the solution, heat and stir magnetically for 2 hours to mix the solution evenly;

[0022] (5) Let the solution obtained in step (4) stand for 24 hours to complete the reaction to obtain an aqueous solution of Ti-CA-EG nitric acid;

[0023] (6) Heat the Ti-CA-EG nitric acid aqueous sol...

Embodiment 2

[0026] (1) 6.4g titanium dioxide (TiO 2 ) powder into 30ml of hydrofluoric acid (HF), heated in a water bath at 85°C until TiO 2 all dissolved;

[0027] (2) Add an appropriate amount of ammonia water to the solution in step (1) to neutralize and generate metatitanic acid precipitation;

[0028] (3) Suction filter and wash the metatitanic acid precipitate in step (2), then add the metatitanic acid into 30ml of nitric acid, stir magnetically until the precipitate is completely dissolved, and obtain a titanium nitrate solution;

[0029] (4) Add 50g of citric acid to the titanium nitrate solution in step (3), and stir magnetically at 60°C to completely dissolve the citric acid; then add 30ml of ethylene glycol solution to the solution, heat and stir magnetically for 2 hours to mix the solution evenly;

[0030] (5) Let the solution obtained in step (4) stand for 24 hours to complete the reaction to obtain an aqueous solution of Ti-CA-EG nitric acid;

[0031] (6) Heat the Ti-CA-E...

Embodiment 3

[0034] (1) Add 6.4g TiO 2 Add the powder into 30ml of hydrofluoric acid and heat in a water bath at 85°C until TiO 2 all dissolved;

[0035] (2) Add an appropriate amount of ammonia water to the solution in step (1) to neutralize and generate metatitanic acid precipitation;

[0036] (3) Suction filter and wash the metatitanic acid precipitate in step (2), then add metatitanic acid into 40ml of nitric acid, stir magnetically until the precipitate is completely dissolved, and obtain a titanium nitrate solution;

[0037] (4) Add 50g of citric acid to the titanium nitrate solution in step (3), and stir magnetically at 60°C to completely dissolve the citric acid; then add 20ml of ethylene glycol solution to the solution, heat and stir magnetically for 2 hours to mix the solution evenly;

[0038] (5) Let the solution obtained in step (4) stand for 24 hours to complete the reaction to obtain an aqueous solution of Ti-CA-EG nitric acid;

[0039] (6) Heat the Ti-CA-EG nitric acid aq...

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Abstract

The invention discloses a preparation method of a Ti-CA-EG water solution. The preparation method comprises the steps of adding TiO2 powder into HF (hydrogen fluoride), and heating in a water bath until TiO2 is completely dissolved; adding ammonium water into a solution, performing neutralization reaction to generate metatitanic acid deposits, performing suction filtration, washing the deposits, adding the deposits into nitric acid, and magnetically stirring until the deposits are completely dissolved to obtain a titanium nitrate solution; adding citric acid into the nitric acid solution to completely dissolve the nitric acid solution; adding an ethylene glycol solution into the solution, heating and mixing to be uniform; standing for 24 hours to obtain a Ti-CA-EG water solution, magnetically stirring at 60 DEG C, and heating until nitric acid is completely volatilized to obtain a stable Ti-CA-EG water solution. According to the method, Ti<4+> and citric acid easily form complexation to obtain the stable Ti-CA-EG water solution by introducing an intermediate phase, namely titanium nitrate, and the production cost is reduced. The method is a novel method for preparing a Ti-containing solution.

Description

technical field [0001] The invention belongs to a ceramic composition characterized by components, in particular to a TiO 2 Method for preparing Ti-CA-EG aqueous solution as raw material. Background technique [0002] TiO 2 It is an important inorganic functional material, which has the functions of humidity sensitivity, gas sensitivity and photocatalysis. It is also an important ceramic material barium titanate (BaTiO 3 , BT), strontium titanate (SrTiO 3 , ST), barium strontium titanate (Ba 0.5 Sr 0.5 TiO 3 , BST) etc. one of the main raw materials. [0003] At present, barium titanate-based ceramic materials can be obtained by many preparation methods, among which the sol-gel (Sol-Gel) method is easy to control because of its low reaction temperature, and the prepared ceramic powder has high purity, good uniformity, and good composition. With the advantages of controllable distribution ratio, it has been widely used in the field of materials science. In recent year...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/624
Inventor 李玲霞董和磊金雨馨于仕辉许丹
Owner TIANJIN UNIV
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