Synthesis and luminescence properties of Pr3+ doped CaxBa1?xTiO3 (0.3?x<1) fine particles |
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Authors: | Shengtai He Yulan Liu and Yusuke Imai |
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Affiliation: | (1) Graduate Aeronautical Laboratories, California Institute of Technology, 91125 Pasadena, CA, USA |
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Abstract: | Ca
x
Ba1−x
TiO3 (CBT) fine particles doped with red luminescence center of Pr3+ ions (Pr: CBT) were successfully synthesized by salt assisted spray pyrolysis (SASP) process. Scanning electronic microscope
(SEM) and laser scattering analysis demonstrate that salt can be removed from the surface of particles by washing with Milli-Q
water and the particles can be further separated by ball-milling to get well-dispersed Pr3+ ions doped CBT fine particles. The luminescence properties, such as photoluminescence (PL) and mechanoluminescence (ML),
of as-synthesized Pr: CBT particles were investigated. For Pr: CBT fine particles with different Ca molar ratios, all the
samples show one emission at 612 nm, with increasing Ca molar ratio, PL intensity of Pr: CBT fine particles become stronger
and stronger. When pressure was loaded on the Pr: CBT pellet, mechanoluminescence(ML) emission was measured. The results show
that the ML intensity is proportional to the applied pressure. |
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Keywords: | |
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