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Raw zirconia ceramic powder with composite crystalline phase structure and high thermal shock resistance and preparation method thereof
The invention discloses raw zirconia ceramic powder with a composite crystalline phase structure and high thermal shock resistance and a preparation method thereof. The raw powder is prepared from the following components: main material, magnesia-alumina spinel powder, spodumene powder and boric acid, wherein the main material is a composition of zirconium oxychloride and yttrium nitrate in a molar ratio of 97:3; the weight ratio of the main material to the sum of the magnesia-alumina spinel powder, the spodumene powder and boric acid is 1: (0.01-0.35); and the weight ratio of the magnesia-alumina spinel powder to the spodumene powder to boric acid is 1: (0.1-2.5): (0.01-0.8). According to the raw powder, the thermal coefficient of expansion is reduced, and the thermal conductivity is improved, so that the performance of bearing a sharp temperature change is improved and the thermal shock resistance is high. Ceramic parts made of the raw powder have high thermal shock resistance, are particularly suitable for ceramic valves and can be widely applied to other ceramic equipment or tools requiring high thermal shock resistance.
Raw zirconia ceramic powder with composite crystalline phase structure and high thermal shock resistance and preparation method thereof
The invention discloses raw zirconia ceramic powder with a composite crystalline phase structure and high thermal shock resistance and a preparation method thereof. The raw powder is prepared from the following components: main material, magnesia-alumina spinel powder, spodumene powder and boric acid, wherein the main material is a composition of zirconium oxychloride and yttrium nitrate in a molar ratio of 97:3; the weight ratio of the main material to the sum of the magnesia-alumina spinel powder, the spodumene powder and boric acid is 1: (0.01-0.35); and the weight ratio of the magnesia-alumina spinel powder to the spodumene powder to boric acid is 1: (0.1-2.5): (0.01-0.8). According to the raw powder, the thermal coefficient of expansion is reduced, and the thermal conductivity is improved, so that the performance of bearing a sharp temperature change is improved and the thermal shock resistance is high. Ceramic parts made of the raw powder have high thermal shock resistance, are particularly suitable for ceramic valves and can be widely applied to other ceramic equipment or tools requiring high thermal shock resistance.
Raw zirconia ceramic powder with composite crystalline phase structure and high thermal shock resistance and preparation method thereof
ZHENG WEI (author) / XU WEIDONG (author)
2015-04-29
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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