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Preparation method of zirconia ceramics

A technology of zirconia ceramics and zirconia powder, which is applied in the field of preparation of zirconia ceramics, can solve the problems of incomplete disclosure of process parameters, uneven performance of zirconia ceramics, and low utilization rate of finished products, so as to achieve reasonable preparation process design, Excellent stability and fracture toughness, high yield

Active Publication Date: 2021-06-29
山东金三河新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing zirconia ceramics urgently need to be improved in terms of aging resistance, stability and fracture toughness, and the disclosed process parameters of the preparation method of zirconia ceramics are incomplete, resulting in uneven performance of the prepared zirconia ceramics. low utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of the zirconia ceramic described in the present embodiment 1 consists of the following steps:

[0027] (1) Grinding zircon sand to 550 mesh, adding tetragonal phase stabilized zirconia powder and sodium carbonate for ball milling to prepare mixed powder;

[0028] (2) α-Al 2 o 3 , dispersant and deionized water were stirred and mixed evenly at a speed of 400r / min to prepare a dispersion;

[0029] (3) Add the mixed powder prepared in step (1) to the dispersion prepared in step (2), stir for 5.5 hours at a temperature of 150°C, then keep warm for 3 hours at a temperature of 400°C, and finally dry After drying and dehydration, the zirconia powder is prepared;

[0030] (4) Pressing the zirconia powder into a zirconia ceramic green body by adopting a zirconia powder molding process, and calcination at a high temperature to prepare zirconia ceramics.

[0031] in:

[0032] The chemical composition of the zircon sand described in step (1) is ZrO 2 6...

Embodiment 2

[0042] The preparation method of the zirconia ceramics described in the present embodiment 2 consists of the following steps:

[0043] (1) Grinding zircon sand to 600 mesh, adding tetragonal phase stabilized zirconia powder and sodium carbonate for ball milling to prepare mixed powder;

[0044] (2) α-Al 2 o 3 , dispersant and deionized water were stirred and mixed evenly at a speed of 300r / min to prepare a dispersion;

[0045] (3) Add the mixed powder prepared in step (1) to the dispersion prepared in step (2), stir for 3.5 hours at a temperature of 200°C, then keep warm for 2 hours at a temperature of 500°C, and finally dry After drying and dehydration, zirconia powder is prepared;

[0046] (4) Pressing the zirconia powder into a zirconia ceramic green body by adopting a zirconia powder molding process, and calcination at a high temperature to prepare zirconia ceramics.

[0047] in:

[0048] The chemical composition of the zircon sand described in step (1) is ZrO 2 68%,...

Embodiment 3

[0058] The preparation method of the zirconia ceramic described in the present embodiment 3 consists of the following steps:

[0059] (1) Grinding zircon sand to 500 mesh, adding tetragonal phase stabilized zirconia powder and sodium carbonate for ball milling to prepare mixed powder;

[0060] (2) α-Al 2 o 3 , dispersant and deionized water are stirred and mixed evenly at a speed of 500r / min to prepare a dispersion;

[0061] (3) Add the mixed powder prepared in step (1) to the dispersion prepared in step (2), stir for 4.5 hours at a temperature of 180°C, then keep warm for 2.5 hours at a temperature of 450°C, and finally pass After drying and dehydration, the zirconia powder is prepared;

[0062] (4) Pressing the zirconia powder into a zirconia ceramic green body by adopting a zirconia powder molding process, and calcination at a high temperature to prepare zirconia ceramics.

[0063] in:

[0064] The chemical composition of the zircon sand described in step (1) is ZrO 2...

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Abstract

The invention belongs to the technical field of zirconia ceramics, and in particular relates to a preparation method of zirconia ceramics. Zircon sand is crushed to 500‑600 mesh, and tetragonal phase stabilized zirconia powder and sodium carbonate are added for ball milling to prepare mixed powder; α‑Al 2 o 3 , dispersant and deionized water are stirred and mixed evenly at a speed of 300-500r / min to prepare a dispersion; add the mixed powder to the dispersion, and stir for 3.5-5.5h at a temperature of 150-200°C, and then Heat preservation and reaction at 400-500°C for 2-3 hours, and finally dry and dehydrate to prepare zirconia powder; use zirconia powder molding process to press into zirconia ceramic green body, and roast at high temperature to prepare zirconia powder Zirconium ceramics. The zirconia ceramics prepared by the preparation method of the invention have good mechanical properties, excellent aging resistance, stability and fracture toughness.

Description

technical field [0001] The invention belongs to the technical field of zirconia ceramics, and in particular relates to a preparation method of zirconia ceramics. Background technique [0002] Zirconia is an inorganic non-metallic material with high melting point, high boiling point, small thermal conductivity, good wear resistance and excellent corrosion resistance. It has been widely used in the manufacture of structural ceramics, functional ceramics, piezoelectric ceramics, electronic ceramics, biological High-tech products such as ceramics, high-temperature optical components, and magnetic fluid generators are among the most promising functional materials in the 21st century. [0003] With the development of nanotechnology, the development of nano-zirconia ceramics has become a research hotspot in the field of science and technology. As a new type of fine ceramics, zirconia ceramics have good mechanical properties (fracture toughness, strength, hardness, etc.), biocompati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/622
CPCC04B35/48C04B35/622C04B2235/3217C04B2235/3427C04B2235/442C04B2235/96
Inventor 李金仁
Owner 山东金三河新材料科技有限公司