투광성 다결정 γ-AlON 세라믹스

• 영문명: Transparent Polycrystalline γ-AlON Ceramics
• 발행기관: 한국세라믹학회
• 저자명: 무하마드 싸빗 아이만(Muhammad Tsabit Ayman) 배현모(Hyeon Mo Bae) 권희진(Heejin Kwon) 이재형(Jaehyung Lee) 윤당혁(Dang-Hyok Yoon)
• 간행물 정보: 『세라미스트』제23권 제3호, 244~260쪽, 전체 17쪽
• 주제분류: 공학 > 화학공학
• 파일형태: PDF
• 발행일자: 2020.09.30

영문 초록

Among many kinds of transparent ceramics, polycrystalline gamma-aluminum oxynitride (γ-AlON) exhibits superior optical and mechanical properties to MgAl 2 O 4 (Mg-spinel), ZnS, MgO, and Y 2 O 3 , which are even comparable to those of sapphire. Due to its high strength, hardness, and wide transmittance range from the UV to mid-IR (0.2 – 5.2 µm), γ-AlON is being applied to IR cameras, scratch-resistant windows, missile domes, transparent armor, and others, especially with increasing demand nowadays. This report discusses the basic formation mechanism of transparent γ-AlON from the Al 2 O 3 and AlN starting materials as well as its stoichiometry based on a proposed constant anion model. In addition, the results from authors’ own research, including the effects of 2-step pressureless sintering and rare earth sintering additive on the properties of γ-AlON, are explained. We hope that this article helps expanding readers’ understanding on transparent ceramics as well as establishing research direction for further breakthrough of transparent polycrystalline γ -AlON.

목차

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키워드

γ-AlON Transparent ceramics Polycrystalline Transmittance