Chemical vapor deposition of ordered structures in YAG-alumina eutectic system
Chemical vapor deposition of ordered structures in YAG-alumina eutectic system
复制标题
YAG-氧化铝共晶体系有序结构的化学气相沉积
DOI：
10.1111/jace.19176
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发表时间：
2023
影响因子：
3.9
通讯作者：
A. Ito
中科院分区：
文献类型：
--
作者：
Y. Mitsuhashi;S. Matsumoto;A. Ito
金属和陶瓷的共晶结构是一种自组织现象的结果，其中多个固相以有序的结构从液相凝固而成。因此，熔体固化过程是在陶瓷共晶体系中产生有序结构的唯一途径。在YAG - al2o3共晶体系中，通过化学气相沉积法制备了结构有序的Y3Al5O12(YAG) - al2o3复合材料。在共晶成分的富Al2O3侧的蓝宝石衬底上生长的氧化铝基体中产生了空间周期性的YAG棒状和片层结构，而在富Y2O3侧的YAG基体中产生了α - Al2O3棒状和片层结构。结果表明，陶瓷共晶体系中有序结构的模式形成不仅发生在熔体凝固过程中，也发生在气相沉积过程中。Ce3+掺杂的yag - al2o3复合薄膜将一些蓝光转化为黄光，允许其中一些通过，并发出白光。Eu3+掺杂的yag - al2o3复合薄膜可以用作高分辨率X射线成像测试的闪烁屏，以穿透半导体存储器件。
The eutectic structure of metals and ceramics is the result of a self‐organization phenomenon in which multiple solid phases solidify with an ordered structure from a liquid phase. Hence, a melt‐solidification process was the only way to generate ordered structures in a ceramic eutectic system. Here, we prepared ordered structures of Y3Al5O12(YAG)–Al2O3composites via chemical vapor deposition in the YAG–Al2O3eutectic system. Spatially periodic YAG rod and lamellar structures were generated in an alumina matrix homoepitaxially grown on the sapphire substrates on the Al2O3‐rich side of the eutectic composition, whereas α‐Al2O3rod and lamellar structures were generated in a YAG matrix on the Y2O3‐rich side. The results reveal that the pattern formation of ordered structures in a ceramic eutectic system can occur not only during in the melt‐solidification process but also during the vapor deposition process. The Ce3+‐doped YAG–Al2O3composite film converts some of the blue light into yellow light, allowing some of it to pass through, and emitting white light. The Eu3+‐doped YAG–Al2O3composite film can be utilized as a scintillation screen for a high‐resolution X‐ray imaging test to see though a semiconductor storage device.