CAJ | 학술논문

以Gd2O3、Al(NO3)3·9H2O和HNO3为原料,柠檬酸为络合剂,通过溶胶凝胶法制备前驱体,经过1 000℃,保温2h热处理得到了纯相铝酸钆(GdAlO3)粉体.通过研究GdAlO3坯体样品的恒速无压烧结曲线发现,当升温速率为5℃/min时,样品在957℃开始收缩,烧结温度为1 600℃时,最大收缩率为16.17％;通过计算得出GdAlO3坯体在烧结温度200～1 000℃范围内平均线膨胀系数是9.38×10-6/℃,以烧结曲线为基础,使用基于相对收缩率的Arrhenius关系,计算得到铝酸钆的烧结激活能为22.4 kJ/mol,低于氧化铝的烧结激活能,说明其会促进氧化铝的烧结.
이Gd2O3、Al(NO3)3·9H2O화HNO3위원료,저몽산위락합제,통과용효응효법제비전구체,경과1 000℃,보온2h열처리득도료순상려산구(GdAlO3)분체.통과연구GdAlO3배체양품적항속무압소결곡선발현,당승온속솔위5℃/min시,양품재957℃개시수축,소결온도위1 600℃시,최대수축솔위16.17％;통과계산득출GdAlO3배체재소결온도200～1 000℃범위내평균선팽창계수시9.38×10-6/℃,이소결곡선위기출,사용기우상대수축솔적Arrhenius관계,계산득도려산구적소결격활능위22.4 kJ/mol,저우양화려적소결격활능,설명기회촉진양화려적소결.
Pure phase gadolinium aluminum (GdAlO3) powder synthesized with the solgel method was obtained at 1 000 ℃ with the holding time of 2 hours.The sintering behaviors of GdAlO3 green compacts were studied through the sintering curves,it was found that the GdAlOs sample began to shrink with the 957 ℃ and the maximum shrinkage was 16.17％ at 1600℃.The average linear expansion coefficient of GdAlO3 green compact is 9.38×10-6/℃ in the range of 200～1 000℃.On the basis of the sintering curve,the sintering activation energy for GdAlO3calculated according to Arrhenius theory was about 22.4kJ/mol,which was lower than that of alumina,indicating that it was useful for the sintering of alumina.