Preparation of barium zirconate titanate solution with inorganic zirconium as zirconium source

A technology of barium zirconate titanate and inorganic zirconium is applied in the field of preparing barium zirconate titanate sol, which can solve the problems of high price, difficulty in purchasing, inconvenient synthesis and the like

Inactive Publication Date: 2005-12-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Shanghai Institute of Ceramics discloses a "wet chemical preparation technology for lead-free barium zirconate titanate functional ceramic film" in CN1350071A. The method uses zirconium propoxide as the source of zirconium. resources (cannot be reused after hydrolysis), and also bring many inconveniences to the synthesis, the most important thing is that it is difficult to industrialize; it is difficult to buy, and the price is expensive; The solvent has certain toxicity, pollutes the environment, and increases the process cost

Method used

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0004] Specific embodiment one: the barium zirconium titanate sol of the present embodiment is realized in this way: a, zirconium oxynitrate is dissolved in deionized water, stirs, after zirconium oxynitrate dissolves completely, add citric acid again, wherein zirconium oxynitrate and The weight ratio of citric acid is 2: (4 ~ 6), stir until a clear and transparent solution, adjust the pH = 3 ~ 4 with ammonia water to obtain a zirconium citrate solution, and dissolve the zirconium citrate in hexanediol, wherein the zirconium citrate The molar ratio with hexanediol is 1: (8 ~ 12), placed in a constant temperature drying box at a constant temperature of 100 ~ 120 ° C for 0.5 ~ 1h, to obtain a hexanediol solution of zirconium citrate; b, barium acetate at a constant temperature of 50 Dissolve in acetic acid at ~70°C to form an acetic acid solution of barium acetate, wherein the weight ratio of barium acetate to acetic acid is 1: (1-3), and cool to room temperature; c. Dissolve tet...

specific Embodiment approach 2

[0005] Specific embodiment two: the barium zirconium titanate sol of the present embodiment is realized in this way: a, zirconium oxynitrate is dissolved in deionized water, stirs, and after zirconium oxynitrate dissolves completely, add citric acid again, wherein zirconium oxynitrate and The weight ratio of citric acid is 2:5, stir until clear and transparent solution, adjust pH=3.5 with ammonia water, obtain zirconium citrate solution, dissolve zirconium citrate in hexanediol, wherein the mole of zirconium citrate and hexanediol The ratio is 1:10, placed in a constant temperature drying oven at a constant temperature of 100-120°C for 0.5-1h to obtain a hexanediol solution of zirconium citrate; b, dissolving barium acetate in acetic acid at a constant temperature of 60°C to prepare The acetic acid solution of barium acetate, wherein the weight ratio of barium acetate and acetic acid is 1: 2, is cooled to room temperature; c, tetrabutyl titanate is dissolved in hexanediol and i...

specific Embodiment approach 3

[0006] Specific embodiment three: the barium titanate sol of this embodiment can be used as the precursor of barium titanate ceramic powder, and its barium titanate ceramic powder is realized in this way: In deionized water, stir with a magnetic stirrer to dissolve completely, add 0.12mol of citric acid, continue to stir until it is a clear and transparent solution, adjust pH=3.5 with ammonia water, dissolve zirconium citrate in hexylene glycol, wherein zirconium citrate and hexylene glycol The molar ratio of alcohol is 1:10, placed in a constant temperature drying oven at a constant temperature of 100-120°C for 0.5-1h to obtain a hexylene glycol solution of zirconium citrate; b, dissolving barium acetate into acetic acid at a constant temperature of 60°C The acetic acid solution of barium acetate is prepared in the middle, wherein the weight ratio of barium acetate and acetic acid is 1:2, and cooled to room temperature; Alcohol solution, wherein the weight ratio of tetrabutyl...

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Abstract

The invention discloses a method for preparing barium zirconate titanate sol by using inorganic zirconium as zirconium source, which relates to the preparation process of inorganic materials. The barium titanate ceramic sol of the present invention is realized like this: a. zirconium oxynitrate is dissolved in deionized water, after zirconium oxynitrate dissolves completely, add citric acid again, zirconium citrate is dissolved in hexanediol to obtain citric acid Hexylene glycol solution of zirconium; b. Dissolving barium acetate in acetic acid to form an acetic acid solution of barium acetate; c. Dissolving tetrabutyl titanate in hexanediol to form a hexanediol solution of tetrabutyl titanate ; d. Mix the acetic acid solution of barium acetate and the hexanediol solution of tetrabutyl titanate evenly; e. move the dehydrated zirconium citrate hexanediol solution into the mixed system of barium acetate and tetrabutyl titanate ; f. Stir the above mixed solution to obtain barium zirconate titanate (BZT) sol. The invention has the advantages of low cost, high purity, energy saving and no pollution.

Description

Technical field: [0001] The invention relates to a preparation process of inorganic materials, in particular to a process for preparing barium zirconate titanate sol by using inorganic zirconium as a zirconium source. Background technique: [0002] Ceramic materials have undoubtedly become an important branch of the material field, and more and more attention has been paid to them in the field of scientific research and application. The research and application of functional ceramic materials has undoubtedly become a dazzling field. It has been widely used in cutting-edge fields such as space technology, ocean development, electronic technology, information technology, and automatic control. The preparation of high-performance, high-quality, and high-purity ceramic materials is the bottleneck of the quality and performance of materials. Therefore, how to prepare such ceramic materials is very critical. In recent years, the rapid development of electronic products, computer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/462C04B35/48C04B35/49C04B35/624
Inventor 郝素娥孙亮
Owner HARBIN INST OF TECH
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