In situ temperature measurement of oxide melt in an are imaging furnace bya monochromatic radiation pyrometer

An are imaging furnace has various advantages as an apparatus for ceramic s ynthesis. However, the disadvantage of this furnace is the difficulty of in situ temperature measurement of the sample, because of a very small heatin g spot in the furnace and the effect of infrared radiation from the light s ource on the measurement, a monochromatic radiation pyrometer is used. In t his paper, a technique for in situ temperature measurement by monochromatic radiation pyrometer is proposed and applied to the melts of a CaO-SiO2 sys tem above 1700 degrees C. Keating up was performed in an are imaging furnac e equipped with a Xenon lamp. The monochromatic radiation pyrometer was pro ven to work appropriately for in situ temperature measurement of the meltin g samples above 1750 degrees C, because it can focus on a small melting dro p 2-3 mm in diameter, and also because it can avoid the effect of infrared radiation horn the Xe lamp, by using a 5 mu m wavelength to detect the radi ation from the sample melts.