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Spark plasma sintering (SPS) of AlN ceramics were carried out with Y2O3 as sintering additive at a sintering temperature 1,550~

1,700

o

C. The effect of Y2O3 addition on sintering behavior and thermal conductivity of AlN ceramics was studied. Y2O3 added AlN

showed higher densification rate than pure AlN noticeably, but the formation of yttrium aluminates phases by the solid-state reaction

of Y2O3 and Al2O3 existed on AlN surface could delay the densification during the sintering process. The thermal conductivity of AlN

specimens was promoted by the addition of Y2O3 up to 3 wt% in spite of the formation of YAG secondary phase in AlN grain

boundaries because Y2O3 addition could reduced the oxygen contents in AlN lattice which is primary factor of thermal conductivity.

However, the thermal conductivity rather decreased over 3 wt% addition because an immoderate formation of YAG phases in grain

boundary could decrease thermal conductivity by a phonon scattering surpassing the contribution of Y2O3 addition.

권호기사

권호기사 목록 테이블로 기사명, 저자명, 페이지, 원문, 기사목차 순으로 되어있습니다.
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참고문헌 (15건) : 자료제공( 네이버학술정보 )

참고문헌 목록에 대한 테이블로 번호, 참고문헌, 국회도서관 소장유무로 구성되어 있습니다.
번호 참고문헌 국회도서관 소장유무
1 G. A. Slack, “Nonmetallic Crystals with , (1973) G. A. Slack, “Nonmetallic Crystals with High Thermal Conductivity,”, J. Phys. Chem. Solids 미소장
2 L. M. Sheppard, (1990) Aluminum nitride: a versatile but challenging material, Am. Ceram. Soc. Bull 미소장
3 Aluminum Nitride: Processing and Applications 네이버 미소장
4 K. Komeya, (1985) Effect of Various Additives on Sintering of Aluminum Nitride, Yogyo-Kyokaishi 미소장
5 Role of Y 2 O 3 and SiO 2 Additions in Sintering of AIN 네이버 미소장
6 A. V. Virkar, (1989) Thermodynamic and Kinetic Effects of Oxygen Removal on the Thermal Conductivity of Aluminum Nitride, Thermodynamic and Kinetic Effects of Oxygen Removal on the Thermal Conductivity of Aluminum Nitride 미소장
7 High‐Thermal‐Conductivity Aluminum Nitride Ceramics: The Effect of Thermodynamic, Kinetic, and Microstructural Factors 네이버 미소장
8 Trends in Advanced SPS Spark Plasma Sintering Systems and Technology 네이버 미소장
9 M. Omori, (2000) Sintering, Consolidation, Reaction and Crystal Growth by the Spark Plasma System (SPS), Mater. Sci & Eng 미소장
10 G. Pezzotti, (2000) Effect of Extended Annealing Cycles on the Thermal Conductivity of AlN/Y2O3 Ceramics, J. Euro. Ceram. Soc 미소장
11 S. W. Choi, (1991) Sintering of Aluminum Nitride (I); Pressureless Sintering, J. Kor. Ceram. Soc 미소장
12 Low-temperature sintering behavior of the nano-sized AlN powder achieved by super-fine grinding mill with Y 2O 3 and CaO additives 네이버 미소장
13 Understanding AlN sintering through computational thermodynamics combined with experimental investigation 네이버 미소장
14 Thermal conductivity improvement of YAG added A1N ceramics in the grain boundary elimination process 네이버 미소장
15 Effect of Y 2O 3 on low temperature sintering and thermal conductivity of AlN ceramics 네이버 미소장