Low-Temperature Sintering of Alumina with Liquid-Forming Additives
نویسندگان
چکیده
منابع مشابه
Low-Temperature Sintering of Alumina with Liquid-Forming Additives
Simultaneous application of colloidal processing and liquidforming additives to alumina resulted in a sintered density of >99% in 1 h at a temperature as low as 1070°C for a commercial high-purity alumina powder at a total dopant level of 2 mol%. The additives were 0.9% CuO + 0.9% TiOz + 0.1% B 2 0 3 + 0.1% MgO. At higher temperatures or after prolonged sintering, the doped alumina ceramic deve...
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It has recently been reported that in the Y203-stabilized tetragonal zirconia phase (TZP) system the addition of a small amount of transition-metal oxides (e.g. CuO, MnO and ZnO) which form a liquid or amorphous grain boundary phase significantly enhances superplasticity [1, 2]. In CuO-added 2Y-TZP abrupt changes have been found in the stress exponent and activation energy across the melting te...
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Alumina-Mullite-Zirconia ceramic composites were prepared by reaction sintering of alumina, zircon mixture and the sintering aids of magnesia and titania at temperatures of 1400 and 1600 C for 2 hours. The development of different phases and microstructures of the composites were analysed to assess the relative influence of the additives on the formation of alumina-zirconia-mullite compos...
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he role of additives has long been a theme in sintering science. Recently, it has been discovered that ceramics may contain multiple different rain boundary phases (complexions) that are chemically induced by certain additives. These complexions are useful in explaining a number of nomalous phenomena associated with sintering, such as abnormal grain growth. The current work investigates how tra...
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ژورنال
عنوان ژورنال: Journal of the American Ceramic Society
سال: 1991
ISSN: 0002-7820,1551-2916
DOI: 10.1111/j.1151-2916.1991.tb07825.x