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Phosphor materials, such as Cr doped spinel (MgAl2O4|), garnet (Y{ub3}Al5O12) and sapphire (Al2O3) crystals and composites of these materials are developed for a highly sensitive thermo-sensor in fluorescence thermometer excited using LED. Temperature dependences of photoluminescence (PL) intensity from these materials are evaluated using LED excitation. PL intensity from sensor materials decreases...
Thermal imaging technique is useful for detecting 2-dimensional spatial distribution and temporal variation of temperature. Thermal images of foods during the cooking process and/or pulse heating process are observed for evaluating the quality of foods in the volume fabrications. Inhomogeneous temperature distribution of a pancake can be observed during the baking process. Water concentration of flour...
Spinel crystals (Cr doped MgAl2O4) with various Cr2O3 and MgO concentrations are grown using floating zone technique for fluorescence thermometer application. Temperature dependence of photoluminescence (PL) intensity is evaluated using spinel crystal and/or composite of spinel with silicone resin. PL intensity from spinel crystal and composite decreases linearly with temperature. Spenel crystal and...
Various materials, such as spinel (MgAl2O4), garnet (Y3Al5O12), sapphire (Al2O3), YAlO3 and long afterglow phosphors (CaAl2O4, SrAl2O4) crystals and composites of these materials are developed for a highly sensitive thermo-sensor in fluorescence thermometer application. Temperature dependences of photoluminescence (PL) lifetime and/or PL intensity from sensor materials are evaluated using crystals...
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