Abstract
Solid solutions based on K3PO4 in systems K3 – 4x E" x PO4 (E" = Si, Ti, Ge, Zr, Sn, Hf, Ce) are synthesized. The crystal structure, thermal behavior, and electroconduction of the synthesized solutions is studied. The narrowest single-phase regions take place in the systems where E" = Si, Ge (x ≤ 0.025), and the widest, in the system with Zr (x ≤ 0.125, at 700°C). Introducing Ti or Sn additives (x ≥ 0.05) and minimum quantities of Zr, Hf, or Ce (x = 0.025) into potassium orthophosphate leads to stabilization of highly-conductive β-modification of K3PO4 at room temperature. Maximum values of potassium-cation conduction in all the systems studied correspond to regions of single-phase solid solutions based on K3PO4. The maximum electroconductivity (0.005 S cm–1 at 300°C, ∼0.1 S cm–1 at 700°C) and the smallest activation energies (32–35 kJ mol–1) take place in the systems with Zr and Hf.
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REFERENCES
Marks, A.R., Burmakin, E.I., Korovenkova, E.S., and Shekhtman, G.Sh., Abstracts of Papers, XI konferentsiya po fizicheskoi khimii i elektrokhimii rasplavlennykh i tverdykh elektrolitov (XI Conf. on Physical Chem. and Electrochem. of Fused and Solid Electrolytes), Yekaterinburg: Ural. Otd. Ross. Akad. Nauk, 1998, vol. 2, p. 77.
Mosin, D.N., Marks, E.A., Burmakin, E.I., Molchanova, N.G., and Shekhtman, G.Sh., Elektrokhimiya, 2001, vol. 37, p. 1005.
Burmakin, E.I., Mosin, D.N., and Shekhtman, G.Sh., Elektrokhimiya, 2001, vol. 37, p. 1392.
Mosin, D.N., Burmakin, E.I., and Shekhtman, G.Sh., Abstracts of Papers, VII Mezhdunarodnyi Frumkinskii simpozium “Fundamental'naya elektrokhimiya i elektrokhimicheskaya tekhnologiya” (VII Int. Frumkin Symp. “Fundamental Electrochem. and Electrochem. Technology), Moscow: IELRAN, 2000, part 2, p. 596.
Shekhtman, G.Sh., Mosin, D.N., and Burmakin, E.I., Extended Abstracts, 12 Int. Conf. on Solid State Ionics, Thessaloniki, Greece: Aristotle Univ., 1999, p. 483.
Milne, S.J. and West, A.R., Mater. Res. Bull., 1984, vol. 19, p. 705.
Irvine, J.T.S. and West, A.R., J. Solid State Chem., 1988, vol. 74, p. 385.
Jungowska, W. and Znamierowska, T., J. Solid State Chem., 1991, vol. 95, p. 265.
Radzilowski, R.H. and Kummer, J.T., J. Electrochem. Soc., 1971, vol. 118, p. 714.
Leonova, L.S., Tkacheva, N.S., Berestenko, V.I., et al., Elektrokhimiya, 1979, vol. 15, p. 1389.
Burmakin, E.I., Vliyanie nestekhiometrii na svoistva soedinenii perekhodnykh metallov (Influence of Nonstoichiometry on the Properties of Transition Metal Compounds), Sverdlovsk: Nauka, 1986, p. 55.
Shekhtman, G.Sh., Burmakin, E.I., and Korovenkova, E.S., Elektrokhimiya, 1999, vol. 35, p. 219.
Shekhtman, G.Sh., Burmakin, E.I., and Korovenkova, E.S., Elektrokhimiya, 1999, vol. 35, p. 223.
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Burmakin, E.I., Shekhtman, G.S. Electroconductivity of Potassium Orthophosphate Modified by Four-Charged Cations. Russian Journal of Electrochemistry 38, 1309–1313 (2002). https://doi.org/10.1023/A:1021616605021
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DOI: https://doi.org/10.1023/A:1021616605021