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Low-temperature sintering producing method of cubic polycrystal zirconia ceramics with yttrium oxide as stabilizing agent

A zirconia ceramic and low-temperature sintering technology, which is applied in the field of preparation of tetragonal polycrystalline zirconia ceramics, can solve the problems of uneven distribution and affect the stability of material properties, and achieves low sintering temperature, inhibition of grain growth, good medium and high temperature performance effect

Active Publication Date: 2009-12-09
河北恒博新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the glass sintering aid is added by mechanical mixing, it may cause uneven distribution, which will affect the stability of material properties

Method used

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  • Low-temperature sintering producing method of cubic polycrystal zirconia ceramics with yttrium oxide as stabilizing agent
  • Low-temperature sintering producing method of cubic polycrystal zirconia ceramics with yttrium oxide as stabilizing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] MgO-Al 2 o 3 -SiO 2 Preparation of composite precursor sol:

[0031] According to MgO:Al 2 o 3 : SiO 2 Accurately weigh 102.6 grams of MgCl with a molar ratio of 0.5:3:1.5 2 ·6H 2 O, 1428.6 g AlCl 3 ·6H 2 O and 321.45 g Si(OC 2 h 5 ) 4 . 321.45 g of Si(OC 2 h 5 ) 4 Hydrolyze for 24 hours, then add deionized water to 2 liters as the base solution; 102.6 grams of MgCl 2 ·6H 2 O and 1428.6 g AlCl 3 ·6H 2 O was dissolved in 1 liter and 2 liters of deionized water respectively to obtain a solution containing magnesium ions and aluminum ions, and then the solution containing magnesium ions and aluminum ions was dropped into Si(OC 2 h 5 ) 4 In the hydrolysis solution, keep the pH value of the solution at 9-10.5 by dripping ammonia water simultaneously, constantly stir Si(OC 2 h 5 ) 4 hydrolysis solution. Continue to stir for half an hour after the titration to obtain a white sol. After the sol was filtered by suction, it was washed with deionized wate...

Embodiment 2

[0035] MgO-Al 2 o 3 -SiO 2 Preparation of composite precursor sol:

[0036] According to MgO:Al 2 o 3 : SiO 2 The molar ratio was 0.8:2.3:1 and 205.1 grams of Mg(NO 3 ) 2 ·6H 2 O, 1725 g Al(NO 3 ) 3 9H 2 O and 208.33 g Si(OC 2 h 5 ) 4 . 208.33 g of Si(OC 2 h 5 ) 4 Hydrolyze for 24 hours, then add deionized water to 2 liters, as the base liquid; 205.1 grams of Mg(NO 3 ) 2 ·6H 2 O and 1725 g Al(NO 3 ) 3 9H 2 O was dissolved in 1 liter and 2 liters of deionized water respectively to obtain a solution containing magnesium ions and aluminum ions, and then the solution containing magnesium ions and aluminum ions was dropped into Si(OC 2 h 5 ) 4 In the hydrolysis solution, keep the pH value of the solution at 9-10.5 by dripping ammonia water simultaneously, constantly stir Si(OC 2 h 5 ) 4 hydrolysis solution. Continue to stir for half an hour after the titration to obtain a white sol. After the sol was filtered by suction, it was washed with deionized wa...

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Abstract

The invention discloses a low-temperature sintering preparation method of tetragonal polycrystalline zirconia ceramics (Y-TZP ceramics) using yttrium oxide as a stabilizer. : Use soluble salts containing Mg and Al ions and Si(OC2H5)4 as raw materials, wherein the molar ratio of MgO:Al2O3:SiO2 is (0.3-0.8):(2.3-6):(1-3.5) to make a precursor Sol; yttria-stabilized zirconia nanometer ultrafine powder is (75-85): (25-15) in solid-liquid mass ratio and is made into slurry by adding water, adding 3-8wt% precursor sol, uniformly mixing and ball milling, and then Granulate, form, and sinter at 1320-1420° C. for 1-3 hours to obtain nanocrystalline Y-TZP ceramics. The Y-TZP ceramic prepared by the present invention is composed of nano crystal grains, has the advantages of good mechanical properties, low sintering temperature and low cost, and can be widely used as a high-performance wear-resistant component material in chemical industry, machinery, communication and aerospace and other fields.

Description

technical field [0001] The invention relates to a preparation method of tetragonal polycrystalline zirconia ceramics (hereinafter referred to as Y-TZP ceramics) which uses yttrium oxide as a stabilizer for low-temperature sintering and fine-graining, and belongs to the technical field of preparation of structural ceramic materials. Background technique [0002] With yttrium oxide (Y 2 o 3 ) as a stabilizer, tetragonal polycrystalline zirconia ceramics (Y-TZP), as a zirconia material with the best comprehensive performance, is increasingly playing an important role in the fields of chemical industry, machinery, communication and aerospace. However, the currently widely used Y-TZP zirconia ceramics generally adopt solid-state sintering process, and the sintering temperature is 1450-1600°C, which requires high equipment and high energy consumption, which makes the production cost of zirconia products remain high, which severely limits further applications of this material. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/622
Inventor 骆树立王建堂骆如田骆如河曹立江朱素峰
Owner 河北恒博新材料科技股份有限公司
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