Development of Fluorescence Thermo-Sensor Composite with Cr Doped YAlO_3 and Silicone Resin

摘要

Thermo-sensor characteristics of Cr doped YAlO_3 composite with silicone resin have been evaluated based on the temperature dependence of photoluminescence intensity from the specimens. Photoluminescence (PL) peaking at wavelengths, X = 725, 732 and 748 nm are observed from the composite sensor with an excitation by green colored LED at X = 536 nm. PL peak intensities and peak intensity ratio varies sensitively with temperature. Silicone composite sensor with 50 wt% of 0.2 at% Cr doped YAlO_3 powders is found to be useful sensor for fluorescence thermometer, because of the large temperature coefficient and good repeatability of PL intensity ratio.