【摘要】 以固相反应法合成了Ｎａ＿２ＳＯ＿４－Ｌｎ＿２（ＳＯ＿４）＿３（Ｌｍ＝Ｌａ，Ｙ）和Ｎａ＿２ＳＯ＿４＿—Ｌａ＿２（ＳＯ＿４）＿３—Ｎａ２ＷＯ４体系固体电解质，以ＸＲＤ和热分析研究了物相与化学组成的关系，以交流阻抗谱研究了材料的电导率。发现Ｌａ摩尔含量大于６％或Ｙ含量大于１２％时，可使高电导的Ｎａ＿２ＳＯ＿４（Ⅰ）相稳定到室温。而１．ａ为４％或Ｙ为５％时，体系具有最高的电导率，比纯Ｎａ＿２ＳＯ＿４约高２个数量级。此时高、低温度段的电导活化能分别为０．３８ｅＶ和０．８２ｅＶ。在Ｎａ＿２ＳＯ＿４＋４％１Ｌａ＿２（ＳＯ＿４）＿３二元系中掺入ＷＯ＿４后，出现一具有四方ＣａＷＯ＿４结构的未知新相，其电导率不高，但它的存在改善了试样的烧结性和致密度，这可能与此固溶体中和的相互作用有关。更多还原

【Abstract】 Synthesis,phase identification and conductivities of the sodium ion conductiors for Na₂SO₄- Ln₂（SO₄）_Ln=La,Yand Na_SO4- La₂（SO₄）₃-Na₂WO₄ systems were studied It is found that the high con- ductive Na₂SO₄ （1 ）phase can be stabilized at room temperature by doping La（>6%,In mole content） Or Y（>12%）,while the conteiit of dopants is 4% for La or 5% for y conductivity of the system will be the highest, about two orders of magnitude higher than that of pure Na₂SO₄.The activation energies in the high and low tem-perature regions are 0.38eV and 0. 82eV respectively。In the Na₂SO₄+4%La₂（SO₄）₃+n%Na₂WO₄ system（n%<0.20）,there exists an unknown phase of tetragonal CaWO₄ structure,which has a low conductivity,However,the sintering property of the samples will be improved by the unknown phase,which is attributed to the stronginteraction between and ions。更多还原