Patent
Process for producing zirconium oxide sintered body
TLDR
In this paper, a zirconium oxide sintered body for an oxygen concentration sensor is produced by mixing 87.5 to 91.0% by weight of ZO powder, 8.5-12.3% of yttrium oxide powder, 0.5% of silicon oxide and 0.2 to 1.0%.Abstract:
A zirconium oxide sintered body for an oxygen concentration sensor is produced by mixing 87.5 to 91.0% by weight of zirconium oxide powder, 8.5 to 12.3% by weight of yttrium oxide powder, 0.5% by weight or less of silicon oxide and 0.2 to 1.0% by weight of aluminium oxide, drying the resulting mixture, followed by sintering so as to make the cubic phase content in crystal phase of the resulting sintered body at ordinary temperatures 95% by weight or more. Such zirconium oxide sintered bodies have excellent mechanical strength, ionic conductivity and thermal shock properties and can be used stably for a long period of time.read more
Citations
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Patent
Method for manufacturing stabilized zirconia
Vladimir V. Belov,Irina Belov +1 more
TL;DR: In this paper, the stabilizer compound is used to stabilize a phase structure selected from the group consisting of tetragonal phase, cubic phase and mixtures of Tetragonal and cubic phases.
Patent
Zirconium oxide and method for the production thereof
TL;DR: In this article, a powdery zirconium oxide containing metal oxides from the group of scandium, yttrium, rare earths and/or the mixtures thereof is described.
Patent
Gas sensor electrolyte
TL;DR: In this paper, the electrolyte comprises up to about 80% zirconia, up to 30% stabilizer, and up to 40% dopant-zirconium.
Patent
Block guage and method of marking ceramic material
TL;DR: In this article, a method of making a ceramic material by radiating a laser beam onto the portion of said ceramic material to be marked in a low oxygen atmosphere and a block gauge marked by this marking method.
Patent
Zirconia ceramics and process for producing the same
TL;DR: A sintered body of zirconia ceramic comprising 74 to 87% by weight of ZrO2 and 26 to 13% of CeO2, and 0.1 to 20% of Al2 O3 and 99.9-80% of CeO2 in the form of tetragonal crystals, is excellent in mechanical strength, resistance and thermal stability as discussed by the authors.
References
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Patent
Al2 O3 /ZrO2 ceramic
TL;DR: The metastable tetragonal ZrO 2 transforms to a stable monoclinic structure thus increasing the energy required for the crack to propagate and retarding its growth.
Patent
Solid electrolyte for use in oxygen concentration sensor
TL;DR: In this article, a solid electrolyte for an oxygen concentration sensor is provided by mixing ZrO2 and about 7.5 to 8.5% by mol of a stabilizer such as Y2 O3.
Patent
Sintered body of zirconia for oxygen concentration sensor
TL;DR: In this paper, 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 existing in mingling relation.
Patent
Oxygen sensor ceramic and process for preparing the same
Tadahiko Miyoshi,Takeo Yamazaki +1 more
TL;DR: In this article, an oxygen sensor ceramic is prepared by mixing zirconia powder having a grain size of 0.1-0.5 μm with 4-8% by mole of yttria powder having an average grain size, and molding and firing the mixture at 1,400°-1,550° C.
Patent
Sinterable fluorite oxide ceramics
Richard J. Brook,Suxing Wu +1 more
TL;DR: In this article, a typical composition is ZrO2 +12 mol % CaO. This is sintered in the solid state as a 40 nm powder using as a sintering additive 0.1 mol % MgO at 1450 C. for 4 hours; a density 98% of the theoretical is achieved.
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