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A method of a composite oxidation precursor of oxalate legal system

A technology of composite zirconia and oxalate, which is applied in zirconia and other directions, can solve problems such as constraints and uneven zirconia powder, and achieve the effect of convenient operation, uniform powder structure and perfect microstructure

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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Effect test

Embodiment 1

[0033] In this embodiment, the method for preparing the composite zirconia precursor by the oxalate method comprises the following steps:

[0034] (1) Prepare zirconium-yttrium mixed solution and oxalate solution;

[0035] In this step (1), the powder raw material is added into pure water, and the zirconium-yttrium mixed solution is obtained after fully dissolving (the dissolution time of the powder raw material is 3 hours); the powder raw material is composed of zirconium oxychloride, yttrium oxide and crystalline chlorine Composition of aluminum chloride, by weight, the ratio of zirconium oxychloride, yttrium oxide, and crystalline aluminum chloride is 250:10:1. The weight percent concentration of zirconium oxychloride in the zirconium-yttrium mixed solution is 15%;

[0036] In the formulated oxalate solution (the oxalate solution in this embodiment is an aqueous solution of sodium oxalate), the weight percent concentration of oxalate is 15%;

[0037] (2) Add the oxalate s...

Embodiment 2

[0053] In this embodiment, the method for preparing the composite zirconia precursor by the oxalate method comprises the following steps:

[0054] (1) Prepare zirconium-yttrium mixed solution and oxalate solution;

[0055] In this step (1), the powder raw material is added into pure water, and the zirconium-yttrium mixed liquid is obtained after fully dissolving (the dissolution time of the powder raw material is 6 hours); the powder raw material is composed of zirconium oxychloride, yttrium oxide and crystalline chlorine Composition of aluminum chloride, by weight, the ratio of zirconium oxychloride, yttrium oxide, and crystalline aluminum chloride is 275:16:0.9. The weight percent concentration of zirconium oxychloride in the zirconium-yttrium mixed solution is 25%;

[0056] In the prepared oxalate solution (the oxalate solution in this embodiment is an aqueous solution of potassium oxalate), the weight percent concentration of oxalate is 5%;

[0057] (2) Add the oxalate s...

Embodiment 3

[0073] In this embodiment, the method for preparing the composite zirconia precursor by the oxalate method comprises the following steps:

[0074] (1) Prepare zirconium-yttrium mixed solution and oxalate solution;

[0075] In this step (1), the powder raw material is added into pure water, and the zirconium-yttrium mixed liquid is obtained after fully dissolving (the dissolution time of the powder raw material is 6 hours); the powder raw material is composed of zirconium oxychloride, yttrium oxide and crystalline chlorine Composition of aluminum chloride, by weight, the ratio of zirconium oxychloride, yttrium oxide, and crystalline aluminum chloride is 240:5:1.1. The weight percent concentration of zirconium oxychloride in the zirconium-yttrium mixed solution is 6%;

[0076] In the prepared oxalate solution (the oxalate solution in this embodiment is an aqueous solution of potassium oxalate), the weight percent concentration of oxalate is 20%;

[0077] (2) Add the oxalate so...

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Abstract

A method for preparing a composite zirconia precursor by an oxalate method, comprising the following steps: (1) preparing a zirconium-yttrium mixed solution and an oxalate solution; (2) adding the oxalate solution dropwise to the zirconium-yttrium mixed solution, Obtaining the reaction solution; (3) aging the reaction solution; (4) separating the solid-liquid from the aged reaction solution with a filter press, and washing the separated solid material with pure water to obtain an intermediate material; Add acid to the intermediate material to obtain the intermediate material liquid, and make the pH value of the intermediate material liquid < 7; (6) add ammonia water to the intermediate material liquid, so that the pH value of the intermediate material liquid is > 7; (7) make the intermediate material liquid A filter press is used for solid-liquid separation, and the separated solid material is washed with pure water to obtain a composite zirconia precursor. The invention reduces the use of ammonia nitrogen, and the waste water is easy to treat; it can be produced in a closed environment, and the operation is convenient; the zirconium and yttrium combined by the oxalate radical according to the chemical bond standard, the powder structure produced 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 an oxalate 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): C04B35/48C01G25/02
CPCC04B35/48C01G25/02C01P2006/80
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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