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Organic acid method for preparing ultrafine partial stable zirconia

A stable zirconia, ultra-fine technology, applied in zirconia, nanostructure manufacturing, nanotechnology and other directions, can solve the problems of low flexural strength, low sintering yield and high sintering temperature, and achieve powder performance improvement, The effect of uniform distribution and not easy to agglomerate

Active Publication Date: 2012-04-18
FUJIAN JOHNSON MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of ultra-fine partial stabilized zirconia prepared by organic acid method to solve the problems of high sintering temperature, low firing yield, low product flexural strength, poor fracture toughness, Insufficient abrasiveness and other technical problems

Method used

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  • Organic acid method for preparing ultrafine partial stable zirconia
  • Organic acid method for preparing ultrafine partial stable zirconia

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Weigh tartaric acid (malic acid is prepared in the same way, if not repeated), zirconium oxychloride (ZrOCl 2 ·8H 2 O), pinpinga, cetyl sulfonic acid, yttrium nitrate. Wherein the molar ratio of zirconium oxychloride to yttrium nitrate is 1:0.03, zirconium oxychloride (ZrOCl 2 ·8H 2 The molar ratio of O) to tartaric acid is 1:3, zirconium oxychloride (ZrOCl 2 ·8H 2 O), the molar ratio of tensio-active agent is 1: 0.004, and the ratio of pinpinga and hexadecanoic acid is 1: 3.

[0016] (2) Prepare a 1mol / L tartaric acid solution for later use, and prepare a 10% solution of Pingpinga and cetylbenzenesulfonic acid for later use.

[0017] (3) Stir the tartaric acid solution in a reaction kettle (300-500r / min) and heat it to 65°C, add zirconium oxychloride, wait until the zirconium oxychloride is completely dissolved, and control the pH=1-2. Heat slowly to 95°C and keep warm. When the pH value is 4-5, add the already prepared Pingpinga and cetylbenzenesulfonic aci...

Embodiment 2

[0019] (1) As in Example 1, the ratio of Pingpingjia to hexadecanoic acid is 2:2.

[0020] (2) Prepare 1.5 mol / L tartaric acid solution for later use, and prepare 10% solution of Pingpinga and cetylbenzenesulfonic acid for later use.

[0021] (3) Stir the tartaric acid solution in a reaction kettle (300-500r / min) and heat it to 65°C, add zirconium oxychloride, wait until the zirconium oxychloride is completely dissolved, and control the pH=1-2. Heat slowly to 95°C and keep warm. When the pH=4-5, add the prepared Pingpinga and cetylbenzenesulfonic acid solution, continue to heat and evaporate the water, and calcined at 750°C-900°C for 10 hours, the particle size of the powder is 50 -65nm.

Embodiment 3

[0023] (1) As in Example 1.

[0024] (2) Prepare a 1mol / L tartaric acid solution for later use, and prepare a 10% solution of Pingpinga and cetylbenzenesulfonic acid for later use.

[0025] (3) Stir the mixed acid solution in a reaction kettle (300-500r / min) and heat it to 65°C, add zirconium oxychloride, wait until the zirconium oxychloride is completely dissolved, and control the pH=1-2. Heat slowly to 95°C and keep warm. When the pH is 4-5, add the prepared Pingpinga and cetylbenzenesulfonic acid solution, continue to heat and evaporate the water, and calcinate at 750°C-900°C for 6 hours, the particle size of the powder is 30-48nm .

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Abstract

The invention provides an organic acid method for preparing ultrafine-part stable zirconia. The ultrafine partial stable zirconia is prepared by a tartaric acid or a malic acid, ZrOCl2.8H2O, a surface active agent and soluble yttrium salt, wherein the mole ratio of the ZrOCl2.8H2O to the soluble yttrium salt is 1 to 0.03; the mole ratio of the ZrOCl2.8H2O to the tartaric acid or the malic acid is1 to 3; the mole ratio of the ZrOCl2.8H2O to the surface active agent is 1 to 0.004-0.01; the reaction temperature of the tartaric acid or the malic acid and the ZrOCl2.8H2O and the soluble yttrium salt can be controlled between 65 DEG C and 95 DEG C; the adding temperature of the surface active agent is 95 DEG C, and the roasting temperature is controlled between 750 DEG C and 1000 DEG C so thatthe partial stable zirconia with the grain diameter of 30-85 nm is obtained. The invention solves the technical problems of high sintering temperature, low sintering finished product ratio, the low breaking strength, the poor fracture toughness and the insufficient abrasive resistance of products, and the like in the technology production of zirconia powder.

Description

technical field [0001] The invention relates to the field of synthesis of inorganic chemicals and new materials, in particular to a method for preparing ultrafine partially stabilized zirconia powder by using an organic acid method. Background technique [0002] Zirconia powder is an inorganic non-metallic material with high temperature resistance, wear resistance and corrosion resistance. At present, most of the enterprises that prepare ultra-fine zirconia powder use co-precipitation method and hydrothermal method. The process of zirconia powder prepared by these processes is difficult to control, and the products produced by using this process have many defects. It is mainly manifested in high sintering temperature, low firing yield, low flexural strength of products, poor fracture toughness, and insufficient wear resistance. The main reasons for these defects are: the particle size of the powder is not well controlled, the impurities are not easy to wash, and the powder ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G25/02B82B3/00
Inventor 徐卫东郑炜
Owner FUJIAN JOHNSON MINING
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