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Jpn. J. Appl. Phys. 23 (1984) pp. 534-543  |Next Article|  |Table of Contents|
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Na+ and Li+ NASICON Superionic Conductors Thick Films

H. Perthuis,1,2 G. Velasco1 and Ph. Colomban2

1Laboratoire de Physico-chimie et Dispositifs Ioniques L.C.R.
2Groupe de Chimie du Solide, L.P.M.C.

(Received December 7, 1983; accepted for publication January 28, 1984)

For microionic applications, superionic conductors have been elaborated in the form of thick films, using silk-screen printable powders. Na3Zr2Si2PO12, Na3.1Zr1.55Si2.3P0.7O11 and Li0.8Zr1.8Ta0.2(PO4)3 compositions are synthesized by a sol-gel process involving hydrolysis-polycondensation reactions of metal-organic alcoholic solutions. A thermal treatment (600°C–800°C) allows to obtain very fine particles (<1 µm) with the pure NASICON phase. Inks are prepared with these powders, an organic binder, volatile fluidifying agents and mineralizers. The layers, about 50 µm in thickness, are achieved by successive deposits and sinterings (950°C–1050°C) onto alumina substrates. Films conductivity is determined by the complex impedance method. Values measured at 300°C (Na+: σ∼10-2 Ω-1cm-1, EA=0.25 eV, Li+: σ∼5 10-4 Ω-1cm-1, EA=0.5 eV) reach those obtained with well-densified ceramics. An anisotropic behaviour related to microstructure is pointed out.

URL: http://jjap.jsap.jp/link?JJAP/23/534/
DOI: 10.1143/JJAP.23.534


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