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Preparation method of high-sintering-activity zirconium oxide powder

A technology of sintering active zirconia powder, which is applied in the field of ceramic powder preparation, which can solve the problems of unstable crystal form, easy agglomeration of powder, and difficult sintering, etc., and achieve the effects of less water content, easy access to raw materials, and high product quality

Pending Publication Date: 2021-01-26
ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem solved by the present invention is to solve the problem that the existing zirconia powder preparation method prepares zirconia powder, and the steps are relatively cumbersome, the powder is easy to agglomerate, the crystal form is unstable, and it is not easy to sinter

Method used

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  • Preparation method of high-sintering-activity zirconium oxide powder
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  • Preparation method of high-sintering-activity zirconium oxide powder

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Effect test

Embodiment 1

[0037] A preparation method of highly sintered active zirconia powder, comprising the following steps:

[0038] (1) Preparation of Zr and M basic precipitated salts: Zirconium oxychloride is used as the main raw material, magnesium nitrate is used as the auxiliary agent, and ammonium bicarbonate is used as the precipitating agent, which are respectively configured into zirconium inorganic salt solutions with a concentration of 0.2g / mol , a concentration of 0.1g / mol metal M nitrate aqueous solution, a concentration of 2g / mol aqueous solution; according to the mass ratio of 16:1, zirconium inorganic salt solution and metal M nitrate aqueous solution are mixed uniformly to obtain Zr-M salt mixed solution;

[0039] (2) According to the mass ratio of 1:1, add the prepared Zr-M salt mixture dropwise to the ammonium bicarbonate aqueous solution while stirring, and age at 20-40°C for 6-18h to obtain a white precipitate;

[0040] (3) Suction-wash the prepared white precipitate with de...

Embodiment 2

[0046] A preparation method of highly sintered active zirconia powder, comprising the following steps:

[0047] (1) Preparation of Zr and M basic precipitated salts: Zirconium oxychloride is used as the main raw material, magnesium nitrate is used as the auxiliary agent, and ammonium bicarbonate is used as the precipitating agent, which are respectively configured into zirconium inorganic salt solutions with a concentration of 0.2g / mol , a concentration of 0.1g / mol metal M nitrate aqueous solution, a concentration of 2g / mol aqueous solution; according to the mass ratio of 16:1, zirconium inorganic salt solution and metal M nitrate aqueous solution are mixed uniformly to obtain Zr-M salt mixed solution;

[0048] (2) According to the mass ratio of 1:1, add the prepared Zr-M salt mixture dropwise to the ammonium bicarbonate aqueous solution while stirring, and age at 20-40°C for 6-18h to obtain a white precipitate;

[0049] (3) The prepared white precipitate was filtered and was...

Embodiment 3

[0055] A preparation method of highly sintered active zirconia powder, comprising the following steps:

[0056] (1) Preparation of Zr and M basic precipitated salts: Zirconium oxychloride is used as the main raw material, magnesium nitrate is used as the auxiliary agent, and ammonium bicarbonate is used as the precipitating agent, which are respectively configured into zirconium inorganic salt solutions with a concentration of 0.2g / mol , a concentration of 0.1g / mol metal M nitrate aqueous solution, a concentration of 2g / mol aqueous solution; according to the mass ratio of 16:1, zirconium inorganic salt solution and metal M nitrate aqueous solution are mixed uniformly to obtain Zr-M salt mixed solution;

[0057] (2) According to the mass ratio of 1:1, add the prepared Zr-M salt mixture dropwise to the ammonium bicarbonate aqueous solution while stirring, and age at 20-40°C for 6-18h to obtain a white precipitate;

[0058] (3) Suction-wash the prepared white precipitate with de...

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Abstract

The invention discloses a preparation method of high-sintering-activity zirconium oxide powder, relates to the technical field of ceramic powder preparation, and aims at solving the problems that existing zirconium oxide powder is easy to agglomerate, unstable in crystal form and not easy to sinter. The preparation method comprises the following steps: preparing basic precipitation salt containingzirconium and M by taking a zirconium inorganic salt as a main raw material and a metal M nitrate as an additive, and then performing ball milling, hydrothermal reaction and high-temperature calcination to prepare the high-dispersion tetragonal-phase zirconium oxide nano powder. The obtained white precipitate is in a non-colloidal state, contains less moisture, has small capillary force action inthe drying process, and is easy to obtain precursor powder which is less in agglomeration and loose; and through a two-step synthesis method, auxiliary agent metal ions are more easily and uniformlydissolved into crystal lattices of zirconium oxide in a solid solution manner in hydrothermal, high-pressure and low-temperature environments after dry gel is crushed and ball-milled, and the preparedzirconium oxide powder is uniform in particle and good in dispersity, and has obviously improved sintering performance compared with industrial zirconium oxide.

Description

technical field [0001] The invention relates to the technical field of ceramic powder preparation, in particular to a preparation method of highly sintered active zirconia powder. Background technique [0002] As an important oxide ceramic material, zirconia is widely used in structural ceramics, functional ceramics, refractory ceramics due to its high melting point, high strength, corrosion resistance, wear resistance, low thermal conductivity, semiconductor and phase change toughening materials etc. Not only that, zirconia stabilized by crystal stabilizers can also be used in ceramic capacitors, gas-sensitive components, catalysts, etc., so the demand for it in the society is also increasing. The preparation of zirconia ceramics usually consists of three parts: powder preparation, pre-press molding, and green sintering. The particle size, uniformity, purity, and dispersibility of the prepared powder are the decisive factors for the physical and chemical properties of cera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/488C04B35/626
CPCC04B35/488C04B35/626C04B35/6264C04B35/62655C04B35/62645C04B35/6261C04B2235/443C04B2235/442C04B2235/785
Inventor 王光应赵羽潘有春张波
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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