X-band microwave permittivity measurements on lithium and cesium salts of 12-tunstophosphoric acid
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Cajkovski, TDavidović, Milorad P.
Cajkovski, D
Likar-Smiljanic, V
Biljic, R
Mioč, Ubavka B.
Nedić, Zoran
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Complex permittivity measurements have been performed on lithium and cesium salts of 12-tungstophosphoric acid hydrates (H3PW12O40.nH(2)O) within the frequency region of the microwave X-band (8 - 12 GHz) and at room temperature. Dielectric relaxation spectra have been observed for both salts. For the lithium salt (Li3PW12O40.11H(2)O) one dipolar relaxation has been recorded, whereas for the cesium salt (CS3PW12O40.10H(2)O) two dipolar relaxations have been registered. The results are discussed by assuming that the fast reorientation of H2O molecules and oxonium ions (H3O+) contribute to the observed relaxations. Dynamical conductivity results exhibit frequency dependence with a waviness reflecting the observed dipolar relaxations.
Keywords:
superionic proton conductors / heteropolyacids salts / microwave permittivity / dielectric relaxationsSource:
Materials Science Forum, 1998, 282-2, 193-197Note:
- Advanced Materials and Processes, 2nd Yugoslav Conference on Advanced Materials (YUGOMAT II), Sep 15-19, 1997, Herceg Novi, Yugoslavia
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VinčaTY - JOUR AU - Cajkovski, T AU - Davidović, Milorad P. AU - Cajkovski, D AU - Likar-Smiljanic, V AU - Biljic, R AU - Mioč, Ubavka B. AU - Nedić, Zoran PY - 1998 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6251 AB - Complex permittivity measurements have been performed on lithium and cesium salts of 12-tungstophosphoric acid hydrates (H3PW12O40.nH(2)O) within the frequency region of the microwave X-band (8 - 12 GHz) and at room temperature. Dielectric relaxation spectra have been observed for both salts. For the lithium salt (Li3PW12O40.11H(2)O) one dipolar relaxation has been recorded, whereas for the cesium salt (CS3PW12O40.10H(2)O) two dipolar relaxations have been registered. The results are discussed by assuming that the fast reorientation of H2O molecules and oxonium ions (H3O+) contribute to the observed relaxations. Dynamical conductivity results exhibit frequency dependence with a waviness reflecting the observed dipolar relaxations. T2 - Materials Science Forum T1 - X-band microwave permittivity measurements on lithium and cesium salts of 12-tunstophosphoric acid VL - 282-2 SP - 193 EP - 197 UR - https://hdl.handle.net/21.15107/rcub_vinar_6251 ER -
@article{ author = "Cajkovski, T and Davidović, Milorad P. and Cajkovski, D and Likar-Smiljanic, V and Biljic, R and Mioč, Ubavka B. and Nedić, Zoran", year = "1998", abstract = "Complex permittivity measurements have been performed on lithium and cesium salts of 12-tungstophosphoric acid hydrates (H3PW12O40.nH(2)O) within the frequency region of the microwave X-band (8 - 12 GHz) and at room temperature. Dielectric relaxation spectra have been observed for both salts. For the lithium salt (Li3PW12O40.11H(2)O) one dipolar relaxation has been recorded, whereas for the cesium salt (CS3PW12O40.10H(2)O) two dipolar relaxations have been registered. The results are discussed by assuming that the fast reorientation of H2O molecules and oxonium ions (H3O+) contribute to the observed relaxations. Dynamical conductivity results exhibit frequency dependence with a waviness reflecting the observed dipolar relaxations.", journal = "Materials Science Forum", title = "X-band microwave permittivity measurements on lithium and cesium salts of 12-tunstophosphoric acid", volume = "282-2", pages = "193-197", url = "https://hdl.handle.net/21.15107/rcub_vinar_6251" }
Cajkovski, T., Davidović, M. P., Cajkovski, D., Likar-Smiljanic, V., Biljic, R., Mioč, U. B.,& Nedić, Z.. (1998). X-band microwave permittivity measurements on lithium and cesium salts of 12-tunstophosphoric acid. in Materials Science Forum, 282-2, 193-197. https://hdl.handle.net/21.15107/rcub_vinar_6251
Cajkovski T, Davidović MP, Cajkovski D, Likar-Smiljanic V, Biljic R, Mioč UB, Nedić Z. X-band microwave permittivity measurements on lithium and cesium salts of 12-tunstophosphoric acid. in Materials Science Forum. 1998;282-2:193-197. https://hdl.handle.net/21.15107/rcub_vinar_6251 .
Cajkovski, T, Davidović, Milorad P., Cajkovski, D, Likar-Smiljanic, V, Biljic, R, Mioč, Ubavka B., Nedić, Zoran, "X-band microwave permittivity measurements on lithium and cesium salts of 12-tunstophosphoric acid" in Materials Science Forum, 282-2 (1998):193-197, https://hdl.handle.net/21.15107/rcub_vinar_6251 .