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Reaction Sintering 에 의한 ZnO:Al2O3 합성물의 구조 및 광학적 특성
박계춘,유용택,강병모 한국센서학회 1998 센서학회지 Vol.7 No.3
ZnO and Al₂O₃ powder were weighed in 1 : 1 mole ratio and ball-milled in ethanol for 3 h. Dried mixture were pressed and then sintered at 900 ℃ ∼ 1200 ℃ for 3 h in vacuum(3 X 10^(-5) Torr). According to XRD, remnant ZnO and Al₂O₃ not converted to ZnAl₂O₄ were observed up to 1100℃, which were completely changed to ZnAl₂O₄ ternary compound at 1200. Optical bandgap is calculated at 4.75 eV. With increasing sintering temperature, PL spectrums shifted to shorter wavelengths and are appeared 430nm at 1200 ℃.