Investigations of amorphous La1−xNdxP5O14 and its crystallization
| Autor: | Hua Fu Wang, Yan Bin Liu, Jiang Dong Deng, Guo Xiang Lan, Jia Ji Li, Mei Zhen Zheng |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Chemistry
Annealing (metallurgy) Thermal decomposition Analytical chemistry Condensed Matter Physics Electronic Optical and Magnetic Materials Amorphous solid law.invention Thermogravimetry symbols.namesake law Differential thermal analysis Materials Chemistry Ceramics and Composites symbols Crystallization Raman spectroscopy Raman scattering |
| Zdroj: | Journal of Non-Crystalline Solids. 151:261-267 |
| ISSN: | 0022-3093 |
| DOI: | 10.1016/0022-3093(92)90038-l |
| Popis: | The crystallization of amorphous La1−xNdxP5O14 (a-LNPP) has been investigated by DTA, TG, X-ray diffraction and Raman scattering. During annealing in air, a-LNPP transformed to crystalline La1−xNdxP5O14 (c-LNPP) and partially decomposed to La1−xNdxP3O9 and P2O5. The decomposition was inhibited by annealing in saturated P2O5 vapor. The results of Raman spectra show that the PO43− tetrahedra, the structural unit of c-LNPP, are retained in a-LNPP. The Raman frequencies of the crystallized a-LNPP decrease with increasing annealing temperatures from 750 to 900°C, which are attributed to the stresses induced during crystallization. |
| Databáze: | OpenAIRE |
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