Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10632185 | Materials Research Bulletin | 2005 | 8 Pages |
Abstract
We have identified the crystallographic phases of the melt-quenched superionic composites (AgI)0.7- (NaPO3)0.3 and (AgI)0.8- (NaPO3)0.2 by X-ray diffraction. Measurements were made in a temperature range from 300 to 630âK. The materials have a glass phase and one or more crystalline phases. At 300âK and at 350âK, the crystalline phase contains a 30:70 mixture of \betaAgI and \gammaAgI. Above 350âK, the fraction of \betaAgI increases and at 403âK it is the dominant phase with a \beta- \gamma ratio of about 70:30 (slightly less in (AgI)0.8- (NaPO3)0.2). At 453, 523 and 623âK the crystalline material is mainly \alphaAgI. Crystalline 16-silver dodecaiodide diphosphate (Ag16I12P2O7) is also present between 373 and 523âK at a 5-10% level. It disappears at 623âK because the crystal melts.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
A. Purwanto, E. Kartini, T. Sakuma, M.F. Collins, T. Kamiyama,