EFFECTS OF DISPERSED SECOND-PHASE PARTICLES ON MIXED CONDUCTORS OF Li_(1+x)V_3O_8(X=0, 1)

The structure and electric properties of the mixed conductors of Li_(1+x)V_3O_8(x=0.1) containing dispersed second-phase α-Al_2O_3 particles have been studied in the paper. The total conductivity of the specimen containing 6m/o α-Al_2O_3 is five or six times as much as that of pure Li_(1+x)V_3O_8 (x=0.1) at room temperature. By the analyses of NMR and ESR, it is known that at low temperature, the transport activation energy of Li^+ ions reduced, the transport frequency of Li^+ ions are speeded up and thus ionic conductivity increased in the specimens containing α-Al_2O_3 particles. At high temperature, diffusion effect of α-Al_2O_3 on electronic transport becomes great, the enhancement of ionic conductivity caused by α-Al_2O_3 doesn't make up the decrease of electronic conductivity caused by the diffusion effect, so that total conductivity of the specimens containing DSPP is lower than that of pure Li_(1+x)V_3O_8(x=0.1). As a result, DSPP mainly increases ionic conductivity of the mixed conductors at room temperature.

sp系列分散剂的合成及应用研究

SP系列分散剂是液状分散染料专用分散剂。液状染料以其生产节能、使用方便、染色上色率和得色量均高的特点而成为一种较好的染料剂型。在国际上,液状染料已有多种商品染料出售,大量用于印染工业和造纸工业等染色部门。在我国液状染料尚处于试制、试用、开发阶段。对于液状分散染料来说,分散剂的选择和制造是生产液状分散染料的关键。SP系列分散剂的合成为液状分散染料的生产提供了一类良好的分散剂。