The application of NASICON (Na2Zr2Si2PO12) to the thermodynamic study of beta-alumina
✍ Scribed by G. Róg; S. Koziński; A. Kozlowska-Róg
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 237 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0013-4686
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✦ Synopsis
The solid-state galvanic cell with NASICON as au auxiliary electrolyte was built. The standard Free enthalpy, entropy and enthalpy of beta-alumina Formation as well as the Na,O-activity in the alphaalumina-beta-alumina coexistence region were determined in the temperature range 97G1220K. The limiting temperature of spontaneous decomposition of beta-alumina was also estimated. The results were compared with those obtained by other authors.
📜 SIMILAR VOLUMES
The solid solution Na,+ar,(P0,),\_,( ),has been investigated by \*)Na NMR. The parameters of the quadrupole tensor of the Na( 1) positions in NaZr2(P04), are yq= 1.2kO.l MHz and ~=0.04+0.04. Those for the Na( 1) and Na(2) sites in Na,Zr,(SiO,), are found to be Na( 1): vq= 1.04+0.1 MHz, ~=0.84?0.7; N
Up to four fixed resonances are observed in the title system independent of the composition: NaZr2(P04)X (J&OS), Na3Zr1.S(P04)3 (y>O), Na4P20r (y>O) and a fourth line which we are so far unable to interpret in structural terms. The "P chemical shift parameters of NasZr,.S(P04)s are: 6= -11.9 k 0.3 p