Compositions: coating or plastic – Coating or plastic compositions – Marking
Patent
1979-03-21
1980-08-26
McCarthy, Helen M.
Compositions: coating or plastic
Coating or plastic compositions
Marking
106 57, 106 732, 204195S, C04B 3548, G01N 2758
Patent
active
042193591
ABSTRACT:
A sintered body of zirconia material for an oxygen concentration sensor exhibiting an electromotive force in accordance with the difference in the concentration of oxygen between a gas tested and a reference gas, consisting essentially of partially stabilized sintered zirconia and at least one additive selected from the group of yttrium oxide, calcium oxide and ytterbium oxide which zirconia has a cubic phase and a monoclinic phase existing in mingling relation. The ratio of the X-ray diffraction intensity of the surface (111) of the monoclinic phase to the X-ray diffraction intensity of the surface (111) of the cubic phase or the ratio I(111)/I(111) is in the range between 0.05 and 0.40, and the value of the X-ray diffraction intensity ratio caused by heating the sintered zirconia material to, and holding the same at, the temperature range between 200.degree. and 300.degree. C. minus the former ratio of the X-ray diffraction intensity is in the range between -0.05 and +0.10.
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patent: 4152234 (1979-05-01), Polliver
Duwez, P. et al., "Quantitative Analysis of Cubic and Monoclinic Zirconia by X-Ray Diffraction", J. Am. Cer. Soc. (1949), 32, pp. 180-183.
Kingery, W. D., "Oxygen Ion Mobility in Cubic Zr.sub.0.85 Ca.sub.0.15 O.sub.1.85 ", J. Am. Cer. Soc. (1959), 42, pp. 393-398.
Takagi, H. et al., "Verfahren zur Herstellung sehr feiner Oxidpulver", Ber. Dt. Keram.S. GeR (1974), No. 8, pp. 234-235.
Miwa Naoto
Ouki Masami
Suzuki Masatosi
Tanaka Katsuhiko
McCarthy Helen M.
Nippondenso Co. Ltd.
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