Abstract
AbstractIn this paper, the optical absorption and radioluminescence (RL) of polycrystalline ceramic and powder CaWO4 are studied. The samples were synthesized via a solid‐state method. Differential thermal analysis and thermogravimetric (DTA/TG) measurements indicate a minimum temperature of 700°C for calcination of precursors. The crystalline phase of the samples of calcium tungstate was investigated by X‐ray diffraction (XRD). The RL of the crystal powder and ceramics are in agreement with that present in the literature for bulk single crystals, presenting a single emission band centered at 420 nm when irradiated with β‐rays. UV‐vis absorption spectroscopy shows that the maximum absorption band of the CaWO4 sample is at around 400 nm, indicating the presence of mixed valence states of W5+ and W6+, associated with a possible breaking of structural symmetry caused by WO4 tetrahedral distortion.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Applied Ceramic Technology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
