Development of a high temperature equipment using infrared ray

为了研究行星材料的形成过程，观察高温下矿物的结构变化和相变是很重要的。然而，在1000 ~ 1400℃温度范围内的高温设备，特别是在温度稳定、寿命长、污染少和环境控制方面还没有开发出来。本研究针对上述条件研制了新型加热装置。炉是椭圆形的红外线炉，其中一个焦点上有卤素灯，炉内涂有金。另一个焦点是表面经过抛光的硅玻璃棒。从灯中射出的红外线的80%集中在玻璃棒的表面上。将集中在棒上的红外线引入棒中，并在棒中以全反射的方式传递到试样位置。为了获得更高的温度，红外线必须聚焦在试样上。当采用透镜系统进行聚焦时，色差是难以避免的。因此，引入了反射锥系统，通过全反射来集中红外线。合适的聚焦锥材料必须具有高透明度和对红外线的高反射率。在这一点上，选择了SiO2玻璃和蓝宝石。由于制造困难和成本高，蓝宝石只应用于反射锥。温度是由几种材料的熔点校准的。使用一端制造成锥形（20度锥形角）的SiO2玻璃棒，最高温度可达1400℃。我们进一步引入了一个pt涂层的锥区域，以避免射线泄漏。在5mm PHI范围内获得均匀温度。我们将这种高温设备应用于x射线进动相机和高

In order to investigate the formation process of the planetary materials, it is important to observe the structural changes and the phase transitions of mierals at high temperature. However, the adequate high temperature equipments for the tempearture range of 1000 - 1400 oC have not been developed, especially for temperature stability, long life-time, least contamination and circumstance control. In this reasearch, the new heating device was developed for the conditions avobe mentioned. The furnace is the oval-formed infra-red furnace, where a halogen lamp is situated on one of the forcuses and inside of the fornace is coated by gold. In the other focus a silica-glass rod whose surface was polished is set. The 80% of infra-red ray which was ejected from the lamp is concentrated on the surface of the glass rod. The infra-red ray concentrated on the rod is introduced in the rod and proceeded in the rod to the specimen position with total reflection. In order to attain much higher temperature, the infra-red ray must be focued on the specimen. When the lens system is adopted for forcusing, it is difficult to avoid chromatic aberration. Therefore, the reflection cone system was introduced where the infra-red ray is concentrated by total reflection. The adequate materials for the focusing cone must have high transparency and high reflactive index to infra-red ray. On this point of view, SiO2 glass and saphire were selected. Because of manufacturing difficulty and high cost, saphire was applied only to the reflection cone. The temperature was calibrated by the melting points of several materials. The highest temperature was attained to be 1400oC by using a SiO2 glass rod whose end had been manufactured to the cone (20 degree of conical angle). We introduced further a Pt-coating to the cone area to avoid the leak of ray. The homogeneous temperature was attained in the area of 5mm PHI.We applied this high temperature equipment to the X-ray precession camera and the high te