Production of metastable tetragonal zirconia

Details Production of metastable tetragonal zirconia Production of metastable tetragonal zirconia

1984-08-22

1985-05-28

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

423266, 423608, 501103, 501104, 501152, C04B 3548

Patent

active

045201145

ABSTRACT:
This invention provides a process for producing a fine grain metastable tetragonal zirconia which has an average particle size less than about 1000 angstroms in diameter.
The process involves multistage thermolysis of precursor solids comprising a homogeneous mixture of .beta.-ketonate compounds of zirconium and a stabilizer metal such as yttrium.

REFERENCES:
patent: 4349456 (1982-09-01), Sowman
patent: 4358516 (1982-11-01), Lange
patent: 4360598 (1982-11-01), Otagiri
patent: 4429051 (1984-01-01), Davidge et al.
patent: 4465778 (1984-08-01), Brook et al.
Meriani, S., "Thermal Evolution of Ceria-Zirconia Metallorganic Precursors"-Thermochimica Acta, 58 (1982) pp. 253-259.
Suvorova, O. N. et al., "Structure and Properties of Use of Metal .beta.-Diketonates", Nauka, 1978, pp. 116-119.
Rieth, P. H., et al., "Fabrication and Flexural Strength of Ultrafine-Grained Yttria-Stabilized Zirconia"-J. Am. Cer. Soc.-pp. 717-727.

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