Crystal Structures and Optical Properties of Transparent Ceramics Based on Complex Perovskite Ba(M4+,B12+,B25+)O3 (M4+=Ti, Sn, Zr, Hf; B12+=Mg, Zn; B25+=Ta, Nb)
We investigated the crystal structures and optical properties of Ba(M,Mg,Ta)O3, Ba(M,Zn,Ta)O3, and Ba(M,Mg,Nb)O3 (M=Ti, Sn, Zr, and Hf) transparent ceramics. Tetravalent cation substitution resulted in a reduction in the 1:2 order structure of the B-site of the parent perovskites; this in turn led to an increase in the transmittance of the ceramics. There was an increase in the refractive index of Ba(Mg1/3Ta2/3)O3 due to Ti, Zr, and Hf substitution at the B-site; the refractive index was particularly high in the case of Ti substitution. Furthermore, Ti substitution resulted in a significant decrease in the Abbe number of Ba(Mg1/3Ta2/3)O3. The refractive index of the perovskites was calculated with high accuracy using the Gladstone–Dale relation. We hypothesize that the Abbe number of perovskites is dependent on its band-gap energy.
No Supplementary Data
No Article Media
Document Type: Research Article
Affiliations: Murata Manufacturing Co. Ltd., Nagaokakyo-shi, Kyoto 617-8555, Japan
Publication date: 2010-04-01