Thermal energy storage with chemical reaction of NaINH3 system—I. Region of liquid phase

A liquid phase in the reaction of solid sodium iodide with gaseous ammonia offers a method of thermal energy storage at temperatures for air-conditioning. Although the maximum temperature where the solid ammoniate exists, is around 31°C under 2.7 kg/cm² ammonia pressure, a considerably wide range of liquid phase can be used for storage of thermal energy. In addition to that, the liquid region extends to temperatures below zero under higher pressure than atmosphere. The density of the liquid ammoniate varies depending on temperature and ammonia pressure, but the maximum value observed in the present experiments was 1.7 g/cm³.     

ZnO／Ga2O3膜的氨化温度对制作硅基GaN纳米材料的影响

通过在不同温度下氨化ZnO／Ga2O3膜，在Si衬底上成功制备了GaN纳米结构材料。氨化前，ZnO层和Ga2O3膜分别通过射频磁控溅射法依次溅射到Si衬底上。用X射线衍射(XRD)、红外傅里叶变换光谱(FTIR)分析了GaN晶体的结构和组分，利用扫描电子显微镜(SEM)观察了样品的形貌。通过对测试结果的分析可知在Si衬底上由ZnO挥发辅助生长出六方纤锌矿GaN纳米结构晶体，并且ZnO／Ga2O3的氨化温度对形成GaN纳米材料具有明显的影响。