Na+ and Li+ NASICON Superionic Conductors Thick Films
Na+ and Li+ NASICON Superionic Conductors Thick Films
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Na 和 Li NASICON 超离子导体厚膜
DOI：
10.1143/jjap.23.534
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发表时间：
1984
影响因子：
1.5
通讯作者：
P. Colomban
中科院分区：
文献类型：
--
作者：
H. Perthuis;G. Velasco;P. Colomban
对于微离子应用，超离子导体已经以厚膜的形式，使用丝网印刷粉末进行了详细说明。采用溶胶-凝胶法合成了Na 3 Zr 2Si 2 PO 12、Na3.1Zr1.55Si2.3P0.7O11和Li0.8Zr1.8Ta0.2（PO 4）3复合材料。热处理（600°C-800°C）可获得具有纯NASICON相的非常细的颗粒（<1 µm）。油墨由这些粉末、有机粘合剂、挥发性流化剂和矿化剂制备。这些层的厚度约为50 µm，通过在氧化铝基材上连续沉积和烧结（950°C-1050°C）来实现。用复阻抗法测定了薄膜的电导率。在300°C下测量的值（Na+：σ_（10-2）Ω ~（-1）cm ~（-1），EA=0.25 eV，Li+：σ_（10-4）Ω ~（-1）cm ~（-1），EA=0.5 eV）达到了用致密陶瓷获得的值。指出了与微观结构有关的各向异性行为。
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.