Transparency ceramic perovskites

However, it was observed that, as new scintillators, these complex perovskite ceramics have a dilFerent thermal quenching effect, as compared to the conventional scintillator materials, which deserves further investigation in the future. Figure 10.8 shows a photograph of the perovskite transparent ceramic samples, with a thickness of 2 mm [123]. Optical properties, including transmittance, photoluminescence, and photoluminescence decay time, have been characterized. Scintillation properties, such as radioluminescence and pulse height spectra, were studied in details. 

Figure 10.12 shows birefringence values of the perovskite transparent ceramics, as a function of electric field [123]. The quadratic EO coefficient R is proportional... 

There are many applications of perovskites where single crystals are used. However, polycrystalline ceramic materials are often preferable if they can be fabricated in a suitable form, especially in a transparent state. The problem of... 

Opto-ceramics is a family of special transparent oxide materials. Their crystallography stmcture is perovskite type with formulation of ABO3, with unit cell shown schematically in Fig. 2.20, which is tetragonal with Cj > aj = bi. Due to its small size, the center ion (B) could be displaced either upward or downward to form spontaneous polarization, which is also the reason why the polarization can be switched by the application of external electric fields. This behavior is known as ferroelec tricity. 

Yanagida T, Fujimoto Y, Yokota Y, Yoshikawa A, Kuretake S, Kintaka Y et al (2011) Evaluations of pure and ytteibium doped transparent ceramic complex perovskite scintillators. Opt Mater 34 414-418... 

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