CAJ | 학술논문

温度梯度法(temperature gradient technique,TGT)生长的Al2O3晶体因石墨发热体在高温时的挥发和原料中过渡性金属离子的存在,在不同部位呈现不同颜色,一般上部为浅红色,尾部为浅黄绿色.将TGT法生长的Al2O3晶体(φ110×80mm3)依次经过高温氧化气氛、高温还原气氛脱碳、去色退火实验,即"两步法"退火实验,晶体变成无色、透明.经测试,Al2O3晶体的完整性、光学透过率和光学均匀性均有显著提高.
온도제도법(temperature gradient technique,TGT)생장적Al2O3정체인석묵발열체재고온시적휘발화원료중과도성금속리자적존재,재불동부위정현불동안색,일반상부위천홍색,미부위천황록색.장TGT법생장적Al2O3정체(φ110×80mm3)의차경과고온양화기분、고온환원기분탈탄、거색퇴화실험,즉"량보법"퇴화실험,정체변성무색、투명.경측시,Al2O3정체적완정성、광학투과솔화광학균균성균유현저제고.
A crystalline sapphire (Al2O3) boule (φ110 × 80mm3) grown by the temperature gradient technique (TGT) is a bit colored due to carbon volatilization from the graphite heater at high temperatures and the absorption of transitional metal inclusions in the raw material. The sapphire becomes colorless and transparent after decolorization and decarbonization in successive annealings in air and hydrogen at high temperatures. The quality,optical transmissivity,and homogeneity of the sapphire are remarkably improved.