Properties and Shape Control of YAG Powder Prepared by Hydrothermal Reaction

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J. Korean Ceram. Soc. > Volume 37(8); 2000 > Article

Journal of the Korean Ceramic Society 2000;37(8): 739.

수열반응 조건에 의한 YAG 분말의 특성과 형상제어

지성훈, 김상문¹, 구자인, 김태옥

부산대학교 공과대학 무기재료공학과
¹LG전자(주) Display사업본부 Display Device연구소

Properties and Shape Control of YAG Powder Prepared by Hydrothermal Reaction

ABSTRACT

YAG(Y3Al5O12) as host material of YAG:Tb3+ was studied via hydrothermal synthesis of metal hydroxides. We changed the kind of mineralizer, the concentrations and process conditions in hydrothermal synthesis. As a result, we found, acicular YAG powders were obtained by the use of KOH as a mineralizer, the concentration of KOH affected the shape and size of YAG powder. Fine grained YAG were perpared by the use of NH4OH as a mineralizer and the concentration of NH4OH affected crystal phases but did not affect particle size. We could finally get the spherical looking YAG powder at 8 M NH4OH and at 35$0^{circ}C$ for 12h. The average particle size was about 0.2${mu}{textrm}{m}$.

Key words: YAG(${Y_3}{Al_5}{O_{12}}$), Hydrothermal synthesis, Mineralizer