CAJ | 학술논문

以氧化铝(α-A12O3)粉和氧化钛(TiO2)粉为主要原料，以ZrO2、ZnO、MgO、Y2O3、La2O3为稳定剂，摩尔比为1∶1∶1∶2∶2，采用固相反应法制备出钛酸铝陶瓷。研究了复合稳定剂对钛酸铝陶瓷抗弯强度、热稳定性和显微结构的影响。采用热膨胀系数测定仪、万能试验机、X射线衍射仪、扫描电镜等对样品性能进行了表征。实验结果表明，当复合稳定剂含量为25wt.%，烧成温度为1550℃，保温时间为3h时制备的钛酸铝陶瓷性能最佳。其热膨胀系数为0.86×10-6/℃，比无稳定剂的钛酸铝陶瓷降低了35.8%；抗弯强度为48.3MPa，比无稳定剂的钛酸铝陶瓷提高了36.9%。
이양화려(α-A12O3)분화양화태(TiO2)분위주요원료，이ZrO2、ZnO、MgO、Y2O3、La2O3위은정제，마이비위1∶1∶1∶2∶2，채용고상반응법제비출태산려도자。연구료복합은정제대태산려도자항만강도、열은정성화현미결구적영향。채용열팽창계수측정의、만능시험궤、X사선연사의、소묘전경등대양품성능진행료표정。실험결과표명，당복합은정제함량위25wt.%，소성온도위1550℃，보온시간위3h시제비적태산려도자성능최가。기열팽창계수위0.86×10-6/℃，비무은정제적태산려도자강저료35.8%；항만강도위48.3MPa，비무은정제적태산려도자제고료36.9%。
Low thermal expansion aluminum titanate ceramics were prepared by solid state reaction method. The method employed Al2O3and TiO2 powders as raw materials, ZrO2, ZnO, MgO, Y2O3 and La2O3 as stabilizers. The mol ratio of ZrO2/ZnO/MgO/Y2O3/La2O3 was 1:1:1:2:2. The inlfuences of composite stabilizer on lfexural strength, thermal stability and microstructure of Al2TiO5 ceramic were studied. Samples were characterized by means of thermal expansion coefifcient measuring instrument, tensile testing machine, X-ray diffraction and scanning electron microscope. The experimental results indicated that the properties of Al2TiO5 ceramic was best when the stabilizer content was 25wt%, the ifring temperature was 1450°C and the holding time was 3h. Al2TiO5 ceramic was 0.86×10-6 /°C in thermal expansion coefifcient, and decreased by 35.8%. Al2TiO5ceramic was 48.3MPa in lfexural strength, and increased by 36.9%.