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A kind of method for preparing composite zirconia precursor by citrate method

A technology of composite zirconia and citrate, applied in the field of manufacturing ceramic powder precursors, can solve problems such as constraints and uneven zirconia powder, and achieve convenient operation, uniform powder structure and perfect microstructure. Effect

Active Publication Date: 2022-03-11
GUANGDONG ORIENT ZIRCONIC IND SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the microscopic inhomogeneity of the zirconia powder prepared by the traditional solid phase mixing method or co-precipitation method, the performance of zirconia ceramic products is restricted to a certain extent. Therefore, it is necessary to develop a new zirconia powder preparation process. To improve the performance of zirconia ceramic products

Method used

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Comparison scheme
Effect test

Embodiment 1

[0039] In this embodiment, the method for preparing the composite zirconia precursor by the citrate method comprises the following steps:

[0040] (1) Prepare zirconium solution and citrate solution;

[0041] In this step (1), zirconium oxychloride (ZrOCl 2 ·8H 2 O) The powder raw material is added into pure water, and the zirconium solution is obtained after fully dissolving. The weight percentage concentration of zirconium solution is 15%;

[0042] In this step (1), in the prepared citrate solution, the weight percent concentration of citrate is 10%. Citrate solution is an aqueous solution of citrate, and citrate is sodium citrate;

[0043] (2) Add the citrate solution to the zirconium solution dropwise. During the dropping process, keep the temperature of the feed solution (that is, the zirconium solution with the citrate solution added dropwise) at 50-60°C. After the dropwise addition is completed, the reaction solution is obtained ;

[0044]In this step (2), during ...

Embodiment 2

[0062] In this embodiment, the method for preparing the composite zirconia precursor by the citrate method comprises the following steps:

[0063] (1) Prepare zirconium solution and citrate solution;

[0064] In this step (1), zirconium oxychloride (ZrOCl 2 ·8H 2 O) The powder raw material is added into pure water, and the zirconium solution is obtained after fully dissolving. The weight percent concentration of zirconium solution is 25%;

[0065] In this step (1), in the prepared citrate solution, the weight percent concentration of citrate is 6%. The citrate solution is an aqueous solution of citrate, and the citrate is potassium citrate;

[0066] (2) Add the citrate solution to the zirconium solution dropwise. During the dropping process, keep the temperature of the feed solution (that is, the zirconium solution with the citrate solution added dropwise) at 35-45°C. After the dropwise addition is completed, the reaction solution is obtained ;

[0067] In this step (2),...

Embodiment 3

[0085] In this embodiment, the method for preparing the composite zirconia precursor by the citrate method comprises the following steps:

[0086] (1) Prepare zirconium solution and citrate solution;

[0087] In this step (1), zirconium oxychloride (ZrOCl 2 ·8H 2 O) The powder raw material is added into pure water, and the zirconium solution is obtained after fully dissolving. The weight percent concentration of zirconium solution is 5%;

[0088] In this step (1), in the prepared citrate solution, the weight percent concentration of citrate is 20%. The citrate solution is an aqueous solution of citrate, and the citrate is potassium citrate;

[0089] (2) Add the citrate solution to the zirconium solution dropwise. During the dropping process, keep the temperature of the feed solution (that is, the zirconium solution with the citrate solution added dropwise) at 45-55°C. After the dropwise addition is completed, the reaction solution is obtained ;

[0090] In this step (2),...

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Abstract

A method for preparing a composite zirconia precursor by a citrate method, comprising the following steps: (1) preparing a zirconium solution and a citrate solution; (2) adding the citrate solution to the zirconium solution dropwise, and after the addition is completed, Obtaining the reaction solution; (3) aging the reaction solution; (4) adding yttrium solution or cerium solution to the reaction solution to obtain a mixed material solution; (5) adding lye to the mixed material solution to make the pH of the mixed material solution value ≥ 11; (6) Use a filter press to separate the solid and liquid from the mixed material, and wash to obtain the intermediate material; (7) Add acid to the intermediate material to obtain an intermediate material liquid with a pH value of <7; (8) Add the intermediate material to the intermediate material Ammonia water is added to the material liquid to make the pH value of the intermediate material liquid > 7; (9) The intermediate material liquid is separated from solid and liquid by a filter press, and washed to obtain a composite zirconia precursor. The invention has the following beneficial effects: the use of ammonia nitrogen is reduced, and waste water is easy to treat; it can be produced in a closed environment, and the operation is convenient; and the output powder structure is consistent and uniform.

Description

technical field [0001] The invention relates to a method for manufacturing a ceramic powder precursor, in particular to a method for preparing a composite zirconia precursor by a citrate method. Background technique [0002] As people's demand for zirconia ceramic products such as grinding media below 1mm, ceramic mobile phone backplanes, ceramic electronic accessories, optical fiber ferrule accessories, and artificial teeth is increasing, the ultra-fine zirconia ceramic products used to manufacture these The demand for zirconia powder is also increasing. Due to the microscopic inhomogeneity of the zirconia powder prepared by the traditional solid phase mixing method or co-precipitation method, the performance of zirconia ceramic products is restricted to a certain extent. Therefore, it is necessary to develop a new zirconia powder preparation process. To improve the performance of zirconia ceramic products. Contents of the invention [0003] The technical problem to be ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/626
CPCC04B35/48C04B35/626C04B2235/3225C04B2235/3229
Inventor 许小军陈潮钿吴锦鹏周悦芝
Owner GUANGDONG ORIENT ZIRCONIC IND SCI & TECH CO LTD
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