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A method for preparing composite zirconia precursor

A technology of composite zirconia and precursors, applied in zirconia and other directions, can solve the problems of uneven and restricted zirconia powder, and achieve the effect of perfect microstructure

Active Publication Date: 2018-06-01
GUANGDONG ORIENT ZIRCONIC IND SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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, so 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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  • A method for preparing composite zirconia precursor

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Effect test

Embodiment 1

[0026] In this embodiment, the method for preparing the composite zirconia precursor includes the following steps:

[0027] (1) Add the powder raw materials into pure water, and dissolve fully to obtain a mixed zirconium feed solution (dissolution time is 3 hours);

[0028] The powder raw material is made of zirconium oxychloride (ZrOCl 2 ·8H 2 O), yttrium oxide (Y 2 o 3 ) and crystalline aluminum chloride (AlCl 3 .6H 2 O) composition, by weight, the ratio of zirconium oxychloride, yttrium oxide, and crystalline aluminum chloride is 245: 5: 1.

[0029] (2) deploying ammonia water with a weight percentage concentration of 8%;

[0030] (3) First add pure water with a depth of 8cm into the overflow reactor; then continuously add the mixed zirconium feed liquid obtained in step (1) and ammonia water obtained in step (2) into the overflow reactor, while adding Stir the feed liquid in the overflow reactor to mix the feed liquid evenly, and control the pH value of the feed liq...

Embodiment 2

[0038] In this embodiment, the method for preparing the composite zirconia precursor includes the following steps:

[0039] (1) Add the powder raw material into pure water, and get the mixed zirconium feed solution after fully dissolving (dissolving time is 6 hours);

[0040] The powder raw material is made of zirconium oxychloride (ZrOCl 2 ·8H 2 O), yttrium oxide (Y 2 o 3 ) and crystalline aluminum chloride (AlCl 3 .6H 2 O) composition, by weight, the ratio of zirconium oxychloride, yttrium oxide, and crystalline aluminum chloride is 250: 5.5: 1.1.

[0041] (2) deploying ammonia water with a concentration of 8.5% by weight;

[0042] (3) First add pure water with a depth of 9cm into the overflow reaction kettle; then continuously add the mixed zirconium feed solution obtained in step (1) and ammonia water obtained in step (2) into the overflow reaction kettle, while adding Stir the feed liquid in the overflow reactor to mix the feed liquid evenly, and control the pH val...

Embodiment 3

[0050] In this embodiment, the method for preparing the composite zirconia precursor includes the following steps:

[0051] (1) Add the powder raw materials into pure water, and dissolve fully to obtain a mixed zirconium feed solution (dissolution time is 1 hour);

[0052] The powder raw material is made of zirconium oxychloride (ZrOCl 2 ·8H 2 O), yttrium oxide (Y 2 o 3 ) and crystalline aluminum chloride (AlCl 3 .6H 2 O) composition, by weight, the ratio of zirconium oxychloride, yttrium oxide, and crystalline aluminum chloride is 240: 4.5: 0.9.

[0053] (2) deploying ammonia water with a weight percentage concentration of 7.5%;

[0054] (3) First add pure water with a depth of 8.5cm into the overflow reaction kettle; then continuously add the mixed zirconium feed solution obtained in step (1) and ammonia water obtained in step (2) into the overflow reaction kettle, while adding Stir the feed liquid in the overflow reactor to mix the feed liquid evenly, and control the...

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Abstract

The invention provides a method for preparing a compound zirconium oxide precursor. The method comprises the following steps: (1) adding a powder raw material into pure water; sufficiently dissolving to obtain mixed zirconium material liquid; (2) blending ammonia water; (3) continually adding the mixed zirconium material liquid and the ammonia water into an overflowing reaction kettle; adding while stirring; controlling the pH (Potential of Hydrogen) value of the material liquid to be 9.0 to 9.5; (4) automatically overflowing the material liquid in the overflowing reaction kettle into a homogenization kettle through a discharging hole of the reaction kettle; homogenizing in the homogenization kettle; (5) pumping the homogenized material liquid in the homogenization kettle into an ageing kettle and ageing; (6) carrying out solid-liquid separation on the aged material liquid by utilizing a filter press, and washing a separated solid material with pure water; after washing, removing moisture by utilizing the filter press to obtain the compound zirconium oxide precursor. The compound zirconium oxide precursor produced by the invention has a complete and uniform microstructure; machined zirconium oxide powder can be used for producing a zirconium oxide ceramic product with a high performance and high precision.

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. 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, so 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 solved by the present inven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G25/02C04B35/48
CPCC01G25/02C04B35/48
Inventor 陈仲丛陈潮钿王国营郑常贵许小军李艳杰
Owner GUANGDONG ORIENT ZIRCONIC IND SCI & TECH CO LTD
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