Preparation and Light Transmission Properties of AlON Ceramics by the Two-Step Method with Nanosized Al2O3 and AlN
Preparation and Light Transmission Properties of AlON Ceramics by the Two-Step Method with Nanosized Al2O3 and AlN
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DOI：
10.1007/s11661-011-0809-6
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发表时间：
2011-12-01
影响因子：
2.8
通讯作者：
Wang, Jun
中科院分区：
文献类型：
--
作者：
Qi, Jianqi;Wang, Yuezhong;Wang, Jun
本实验中使用的单相氮化铝（AlON）粉末是在相对低温下，以纳米AlN粉和纳米氧化铝粉为原料，采用固相反应法制备的。得到的粉末经球磨后掺有Y2O3；然后，它被塑造成小球。透明陶瓷在2153 K（1880℃）下烧结5小时、10小时和20小时。在烧结温度下，经过三次保温得到的样品都是透明的，并且样品的透光率随保温时间的增加而增加。样品在5 μ m附近保温20小时，透过率为55%。x射线衍射（XRD）测试表明，样品均为单相AlON。对试样断口形貌的扫描电镜分析表明，随着保温时间的延长，试样的晶粒尺寸略有增大，而孔径和孔隙率明显减小，从而导致透光率增大。孔隙大小和孔隙率是影响样品透光性能的主要因素。
The single-phase aluminum oxynitride (AlON) powder used in this experiment was obtained at relatively low temperature by the solid-state-reaction method with nanosized AlN powder and nanosized alumina powder. The obtained powder was ground by ball milling and doped with Y2O3; then, it was shaped into pellets. Transparent ceramics sintering was carried out at 2153 K (1880 A degrees C) for 5, 10, and 20 hours. Obtained samples for three duration times are all are transparent, and the light transmittance of samples increases with increasing the holding time at the sintering temperature. The transmittance of the sample with 20 hours holding time is 55 pct at near 5 mu m. X-ray diffraction (XRD) measurement shows that all samples were single-phase AlON. The fracture surfaces of samples from scanning electron microscopy (SEM) analysis shows that with increasing the holding time, the grain size grows slightly, while the pore size and porosity decrease apparently, which bring about the transmittance increase. The pore size and the porosity are the main factors affecting the light transmitting properties of samples.