Cadmium silicate nanopowders for radiation dosimetry application: Luminescence and dielectric studies

Journal of Asian Ceramic Societies

S.C. Sharma¹  B.M. Nagabhushana²  S.C. Prashantha³  B.M. Manohara⁴  K. Thyagarajan⁵  B. Daruka Prasad⁶  H. Nagabhushana⁷ 

[1] Chhattisgarh Swamy Vivekananda Technical University, North Park Avenue, Sector – 8, Bhilai, Chhattisgarh 490009, India;Department of Chemistry, M.S. Ramaiah Institute of Technology, Bangalore 560054, India;Department of Physics, East West Institute of Technology, Bangalore 560091, India;Department of Physics, Govt. First Grade College, Davangere 577004, India;Department of Physics, JNTUA College of Engineering, Pulivendula 516390, India;Jawaharlal Nehru Technological University, Ananthapura 515002, India;Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumkur 572103, India;

关键词: Meso-structured silica;    Nanophosphor;    Thermoluminescence;    Dielectric;   

DOI  :  10.1016/j.jascer.2015.02.003

来源: DOAJ

【 摘 要 】

Pure cadmium silicate (CdSiO3) nanophosphor was prepared by a low temperature solution combustion technique. In this technique, meso-structured silica was used as silica source. The prepared compounds were well characterized by powder X-ray diffraction (PXRD), scanning electron microscopy, high resolution transmission electron microscopy, Fourier transform infrared and UV–vis spectroscopic techniques. The PXRD peaks of as-formed sample are broad and amorphous in nature. The compound calcined at 800 °C shows pure monoclinic phase, which is the lowest temperature reported so far to obtain in this phase. The average crystallite size for phase pure compound was found to be ∼31 nm. The optical energy band gap of ∼5.6 eV was observed for the compound. Raman spectrum of the sample showed the all possible states of vibrational motions of the prepared samples. The UV irradiated samples with different dose and time with constant heating rate exhibit the thermoluminescence (TL) with a well resolved glow peak at ∼160 °C. The variation of TL intensity with dosage time results that the material was found to be quite useful in radiation dosimetry. The frequency dependent dielectric constant of the prepared sample exhibits high value at low frequency and vice versa.

【 授权许可】

Unknown