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Preparation method of compound zirconium oxide

A technology of zirconia and zirconia oxychloride, which is applied in the field of preparation of chemical materials, can solve the problems of poor mixing uniformity of composite zirconia materials and difficult control of crystal structure, and achieve excellent mechanical properties, controllable crystal structure, and specific surface area. controllable effect

Active Publication Date: 2012-06-20
GUANGDONG FENGHUA ADVANCED TECH HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above technical problems, the technical problem solved by the present invention is to solve the problems of poor mixing uniformity and difficult control of crystal structure of composite zirconia materials.

Method used

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  • Preparation method of compound zirconium oxide
  • Preparation method of compound zirconium oxide
  • Preparation method of compound zirconium oxide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] a. Control the concentration of the zirconium oxychloride solution before feeding to be 0.3mol / L, and the concentration of ammonia water is controlled to be: 1.6mol / L;

[0011] b. Add ammonia water dropwise to the zirconia solution to react, control the molar ratio of ammonia water to zirconia to 2.0:1, control the reaction temperature to 55°C, control the flow rate to 1800L / h, keep the temperature for 1hr after adding the ammonia water dropwise, and react After completion, zirconium hydroxide hydrogel is generated;

[0012] c. washing the zirconium hydroxide hydrogel with deionized water, and obtaining the zirconium hydroxide colloid through pressure filtration;

[0013] d. Dry the zirconium hydroxide gel at 200°C, and then powder it to obtain powdery zirconium oxide;

[0014] e. Mix powdery zirconia, yttrium oxide, and small materials, wherein the addition amount of yttrium oxide is 4.5%, the amount of small materials is 0.2%, and the mixing time is 5h;

[0015] f. ...

Embodiment 2

[0018] a. Control the concentration of zirconium oxychloride solution before feeding to 0.7mol / L, and the concentration of ammonia water to 2.4mol / L

[0019] b. Add ammonia water dropwise to the zirconia solution to react, control the molar ratio of ammonia water to zirconia to 3.0:1, control the reaction temperature to 70°C, control the flow rate to 2500L / h, keep the temperature for 2hr after adding the ammonia water dropwise, and react Zirconium hydroxide hydrogel is generated upon completion;

[0020] c. washing the zirconium hydroxide hydrogel with deionized water, and obtaining the zirconium hydroxide colloid through pressure filtration;

[0021] d. Dry the zirconium hydroxide gel at 500°C, and then powder it to obtain powdered zirconium oxide;

[0022] e. Mix powdery zirconia, yttrium oxide, and small materials, wherein the addition amount of yttrium oxide is 6.5%, the amount of small materials is 0.6%, and the mixing time is 10h;

[0023] f. After the mixing is comple...

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Abstract

The invention relates to a preparation method of compound zirconium oxide. The method comprises the following steps that: A, ammonia water is dripped into zirconium oxychloride solution for reaction, and zirconium hydroxide water sol is generated after the reaction completion; B, deionized water is used for washing the zirconium hydroxide water sol, and zirconium hydroxide colloid is obtained after press filtering; C, the zirconium hydroxide colloid is dried, and then, powdery zirconium hydroxide is obtained through powdery processing; D, yttrium oxide and auxiliary materials (one kind of materials or several kinds of materials from aluminum oxide, magnesium oxide and calcium oxide) are added into the powdery zirconium oxide to be mixed (through ball mill or stirring tank mixing), and after the mixing completion, the mixed materials are roasted for 2 to 3 hours at 950 to 1050 DEG C, and compound zirconium oxide powder is obtained. The method has the advantages that the scaled production method of high-performance compound zirconium oxide materials is obtained, the produced compound zirconium oxide materials have good uniformity, the specific surface area of products is controllable, and the crystal phase structure is controllable.

Description

technical field [0001] The invention relates to a method for preparing chemical materials, more specifically, the invention relates to a method for preparing composite zirconia. Background technique [0002] High-performance composite zirconia powder is the basic raw material for making zirconia special ceramics, optical communication devices, advanced refractory materials, and new energy materials. At present, the production capacity of domestic composite zirconia is low, and due to the large gap between quality indicators and imported products, it can only be used in relatively low-end industrial fields. [0003] Currently widely used composite zirconia ceramics generally adopt solid-phase sintering and liquid-phase mixed reaction processes. The former consumes a lot of energy and requires high equipment, while the latter is slightly lacking in the uniformity of mixing between the product zirconium and yttrium. Chinese patent application CN101100379A discloses a preparat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/626
Inventor 赵兴国蒋训莎刘艳丽林滟新聂晓明
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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