Rare-earth zirconates, such as lanthanum zirconates and gadolinium zirconates, have been intensively investigated due to their excellent properties of low thermal conductivity as well as chemical stability at high temperature, which can make these materials ones of the most promising candidates for next-generation thermal barrier coating applications. In this study, three compositions, lanthanum/gadolinium zirconates with reduced rare-earth contents from stoichiometric RE2Zr2O7 compositions, are fabricated via solid state reaction as well as sintering at 1600oC for 4 hrs. The phase formation, microstructure, and thermo-physical properties of three oxide ceramics are examined. In particular, each oxide ceramics exhibits composite structures between pyrochlore and fluorite phases. The potential of lanthanum/ gadolinium zirconate ceramics for TBC applications is also discussed.

• 이수진(한국세라믹기술원 이천분원 엔지니어링세라믹팀) | Sujin Lee
• 권창섭(한국세라믹기술원 이천분원 엔지니어링세라믹팀) | Chang-Sup Kwon
• 이성민(한국세라믹기술원 이천분원 엔지니어링세라믹팀) | Sung-Min Lee
• 오윤석(한국세라믹기술원 이천분원 엔지니어링세라믹팀) | Yoon-Suk Oh
• 김형태(한국세라믹기술원 이천분원 엔지니어링세라믹팀) | Hyung-Tae Kim
• 남 산(고려대학교 신소재공학과) | Sahn Nahm
• 김성원(한국세라믹기술원 이천분원 엔지니어링세라믹팀) | Seongwon Kim Corresponding author