Synthesis and Phase Transformation Behavior of YAG Powders by a Mechanochemical Solid Reaction

Hyun-Gi Jung; Gil-Ho Hwang; Kwang-Young Lim; Young-Hun Lee; Sung-Goon Kang

doi:10.4150/KPMI.2006.13.4.243

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기계화학적 고상반응에 의한 YAG 분말의 합성 및 상 형성 거동에 관한 연구: 정현기, 황길호, 임광영, 이영훈, 강성군
Synthesis and Phase Transformation Behavior of YAG Powders by a Mechanochemical Solid Reaction: Hyun-Gi Jung, Gil-Ho Hwang, Kwang-Young Lim, Young-Hun Lee, Sung-Goon Kang; Journal of Korean Powder Metallurgy Institute 2006;13(4):243-249
DOI: https://doi.org/10.4150/KPMI.2006.13.4.243

¹한양대학교 신소재공학과
²한양대학교 신소재공학과
³홍익대학교 재료공학부
⁴요업기술원 전자부품.소재본부
⁵한양대학교 신소재공학과
¹Division of Materials Science and Engineering, Hanyang University
²Division of Materials Science and Engineering, Hanyang University
³School of Materials Science and Engineering, Hongik University
⁴Electronic Parts & Materials Group, Korea Institute of Ceramic Engineering and Technology
⁵Division of Materials Science and Engineering, Hanyang University

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Abstract

Yttrium aluminum garnet (YAG) powders were synthesized via mechanochemical solid reaction using Y_2O_3 with three types of aluminum compounds. Y_2O_3 reacted mechanochemically with all A1 compounds and formed YAM (yttrium aluminum monoclinic), YAG and YAP (yttrium aluminum perovskite) phases depending on the starting materials. The ground samples containing gamma-A1_2O_3 showed the best reactivity, whereas the ground sample containing A100H, which had the largest surface area, exhibited pure YAG after calcination at 1200°C. The sample containing Al had the least reactivity, producing YAP along with YAG at 1200°C. The types and grinding characteristics of the starting materials and grinding time are believed to be important factors in the mechanochemical synthesis of YAG.

Keywords: YAG;Grinding;Phase transformation;Synthesis;XRD;

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