炭酸ガスレーザーによる単結晶回折計用高温装置

抄録

A new laser-heating system which can provide temperatures above 2000°C has been developed for X-ray single-crystal diffraction studies. The system consists ofa CO₂ gas laser, optical system and power controller having a function of measuring the specimen temperature. As a special care is needed for measuring the specimen temperature during intensity data collection, we adapted an optical pyrometer to measure specimen temperatures. The measurement can be executed with less influence of emissivities by ref ering the ratio of radiation intensities corresponding to two wave lengths, in infrared region, to that theoretically derived. The specimen temperature in 1000°-1800°C range was successfully controlled to ±7°C during a trial examination of the total system with a four-circle diffractomter which worked in usual mode of data collection. An application of the system has been demonstrated to the study of high cristobalite at several temperatures from 1000°C to 1600°C.