アルミナゾル/ジルコニア粉末混合系からのアルミナ/ジルコニア複合シートの作製

概要

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Slurries of various mexture ratios of aluminum hydroxide sol, ZrO_2 powder and methyl cellulose as a binder were prepared, and green sheets were formed by the doctor blade method. The green sheets were heat treated in the temperature range from 1200 to 1600℃ in air. Thus, the Al_2O_3/ZrO_2 composite sheets with a thickness of about 0.1 mm were obtained. A homogeneous composite texture was found at the mixture ratio of Al_2O_3/ZrO_2=80/20, and a tetragonal phase (t-phase) of ZrO_2 component was stabilized in such a thin sheet. Also the t-phase was transformed to a monoclinic phase partially by powdering. If α-alumina fine powder was added to aluminum hydroxide sol as a seed previously, a sinterability was promoted. But as a result of composing, a sinterability became un-remarkable. In order to apply a composite sheet for a practical use, it is necessary to improve the technique of composing sheet having a higher density.
社団法人日本セラミックス協会の論文
1995-06-01