Compositions: ceramic – Ceramic compositions – Refractory
Patent
1987-08-17
1989-04-11
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Refractory
501105, C04B 3548, C04B 3550, C04B 3510, C04B 3504
Patent
active
048206679
ABSTRACT:
A high strength zirconia ceramic composition consisting essentially of a compound of ZrO.sub.2 containing less than 5.0 mol % Y.sub.2 O.sub.3 as a stabilizer and further containing 1-30 wt % aluminum and magnesium contents to the amount of the compound of ZrO.sub.2 in terms of Al.sub.2 O.sub.3 and MgO. In the case that the compound of ZrO.sub.2 further contains CeO.sub.2 as a stabilizer, the total amount of Y.sub.2 O.sub.3 and CeO.sub.2 is determined to be 1.0-15 mol % to the amount of the compound of ZrO.sub.2.
REFERENCES:
patent: 4186072 (1980-01-01), Blumenthal et al.
patent: 4221650 (1980-09-01), Friese et al.
patent: 4525464 (1985-06-01), Claussen et al.
patent: 4587225 (1986-05-01), Tsukuwa et al.
Thermochemistry of MgAl.sub.2 O.sub.4 -Al.sub.8/3 O.sub.4 Defect Spinels, Navrotsky et al., J. Am. Ceram. Soc., 69 [5] 418-22 (1986), pp. 418-422.
Mechanical Properties of Y.sub.2 O.sub.3 --Stabilized Tetragonal ZrO.sub.2 Polycrystals After Ageing at High Temperature, J. Am. Ceram. Soc., 69[7] 519-22(1986).
Mechanical Properties and Thermal Stability of CeO.sub.2 Containing Tetragonal Zirconia Polycrystals, Am. Ceram. Soc. Bull., 65[10] (1986).
Thermal Shock Resistance of ZrO.sub.2 Ceramics Stabilized by Rare Earth Oxides, Watanabe et al., Yogyo Kyokai-Shi 94 [3] 1986.
Fukuta Ken
Iwabuchi Muneyuki
Tsunekawa Kyosuke
Bell Mark L.
NGK Insulators Ltd.
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