摘要
研究了用电泳沉积法制备含钇８末在悬浮介质中的荷电机理；采用界面移动法测定了８ＹＳＺ粉末在有机悬浮液中的电泳淌度和ξ电势，研究了ξ电势的影响因素；考察了８ＹＳＺ粉末在有机悬浮液中的分散性和稳定性；研究了电泳沉积的动力学规律，确定了电泳沉积过程的速度控制步骤，推导出电泳沉积速率方程．利用重复沉积－烧结法制备的致密化薄膜厚度为２６～５６μｍ，硬度为４．３３ＧＰａ，在１０００℃时Ｏ－２电导率为１２．２Ｓ／ｍ，电导激活能为１．０９ｅＶ．
Preparation of yttria-stabilized zirconia (8YSZ) film on porous Ni-8YSZ substrate and on porous La 0.8 Sr 0.2 MnO 3 (LSM) substrate bythe electrophoretic deposition(EPD) method for a solid oxide fuel cell. The dispersibility of 8YSZ powder and stability of 8YSZ suspension in several organic media were investigated. Electrophoretic mobility and electrokinetic potential (zeta potential) were measured by the interface moving method. The zeta potential of 8YSZ powder in isopropanol, acetylacetone, ethyl alcohol is 284, 59.7 and 40.3mV respectively. The equations of deposition mass versus time were theoretically derived and found to be consistent with experimental results. The rate controlling step of EPD of 8YSZ in acetylacetone is the migration of charged 8YSZ powder. The thickness of sintered 8YSZ film is about 50 μm. The Vicker hardness is 4.33GPa and the conductivity measured by 4-probe method is 12.2S/m (at 1 000℃).
出处
《化工冶金》
CSCD
北大核心
1998年第2期97-103,共7页
基金
国家自然科学基金
