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The temperature dependence of standard free energy of formation of LaNi_5,CeNi_5 has been de-termined by galvanic—cell technique using 0.95LaF_3·0.05CaF_2 polycrystalline solid electrolyte.The cellused can be expressed as:Mo|La,LaF_3|0.95LaF_3·0.05CaF2|LaNi_5,Ni,LaF_3|Mo(903~1173K)Mo|La|0.95LaF_3·0.05CaF_2|LaNi_5,Ni|Mo(903~1173K)Mo|Ce,CeF_3|0.95LaF_3·0.05CaF_2|CeNi_5,Ni,CeF_3|Mo(873~1023K)The experimental results are as follows:△G_(f,LaNi_5)~0=-152590+13.143T±150 J/mol(903~1173K)△G_(f,CeNi_5)~0=-157600+25.514T±150 J/mol(873~1023K) 相似文献
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用直接合成法制备了Caβ"-Al2O3固体电解质,在10^-2~1MHz频率范围内,于1073~1523K温度区间测定了电解质的阻抗谱,并计算得到电导率,其数量级为10^-6~10^-5Ω^-1·cm^-1。用Caβ"-Al2O3作为固体电解质,以Sn-Ca合金为参比电极,组装成电池Mo|Sn-Ca|Caβ"-Al2O3·|[Ca]Fe|Mo(ZrO2),于1833K温度下测定了纯铁液中溶解态钙… 相似文献
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富硼渣熔体物理性质测定 总被引:2,自引:1,他引:1
用化学试剂氧化物配制合成富硼渣,利用ZC-1600型高温综合测试仪、内柱体旋转法测定其粘度及熔化性温度;双柱联称法同时测定熔渣的密度及表面张力。探讨了富硼渣组成与熔体物理性质的关系,为优化硼铁矿高炉铁硼分离工艺提供依据。 相似文献
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1.IntroductionDunn and Farrington[1]found that theNa ion in Naβ″-alumina single crystal canbe exchanged completely or partially withGd~(3+),Nd~(3+),Eu~(3+),Yb~(3+),Sm~(3+),Tb~(3+),Dy~(3+),Bi~(3+)and Pr~(3+)ions,but no reports havebeen published about the ion exchange reac-tion between La3+ and Naβ″-alumina.If anion exchanged polycrystalline β″-alumina isavailable and its ionic conductivity is highenough to be applied as a solid electrolyte inthe galvanic cell,it can be used in various 相似文献
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Thermodynamic properties of 3Y_2O_3·5Al_2O_3 double compound have been determined with CaF_2 single crystal electrolyte galvanic cell at 1049 K to 1230 K.The galvanic cell used can be expressed as: Pt,O_2(g)丨Y_2O_3(s),YOF_((s))丨CaF_2丨YOF_((s)), 3Y_2O_3·5Al_2O_(3(s))丨Al_2O_(3(s))丨O_2(g),Pt, of which the cell reaction is; 3Y_2O_(3(s))+SAl_2O_(3(s))=3Y_2O_3·SAl_2O_(3(s)) The following result is obtained: A_fG°(3Y_2O_3·5Al_2O_3)=-939500+765.90T±710J/mol where,△fG°(3Y_2O_3·5Al_2O_3)is the free energy of formation of 3Y_2O_3·5Al_2O_3 from Y_2O_3 and Al_2O_3. 相似文献