Stabilization of Low-Temperature Metastable Phase of <TEX>$ZrO_2$</TEX>

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J. Korean Ceram. Soc. > Volume 27(5); 1990 > Article

Journal of the Korean Ceramic Society 1990;27(5): 613.

저온 준안정상 $ZrO_2$의 안정화

오영제, 정형진, 이희수¹

한국과학기술연구원 세라믹스부
¹연세대학교 요업공학과

Stabilization of Low-Temperature Metastable Phase of $ZrO_2$

ABSTRACT

The pure and 6mol% MgO-doped ZrO2 powders were prepared by hot petroleum drying method. The power characterization of homogeneous fine powder was indentified by the method of thermal analysis, BET and electron microscope. The transformation, content of t-ZrO2, crystallite size and apparent strain were measured by X-ray diffraction technique. The prepared powders were transformed in order of amorphouslongrightarrowmetastable cubic ZrO2longrightarrowmetastable tetragonal ZrO2longrightarrowstable monoclinic ZrO2 by a adequate heat treatment. The stabilization of metastable phase can be discussed in terms of energetial concept ; the difference of surface energy and internal strain in particle.