Effect of BaO addition on relative density and electric conductivity of xNi/10NiO-NiFe2O4 cermets |
| |
Authors: | Han-bing He Zhi-you Li Ke-chao Zhou and Bai-yun Huang |
| |
Affiliation: | State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China |
| |
Abstract: | xNi/10NiO-NiFe2O4 (x=5, 10, 17) cermets and those doped with 1% BaO (mass fraction) were prepared by cold isostatic pressing at 200 MPa and sintering
in nitrogen atmosphere at 1 473 K. The effects of BaO addition on relative density, microstructure and electric conductivity
of cermets were investigated. The results show that relative densities of xNi/10NiO-NiFe2O4 cermets (x=5, 10, 17) doped with 1% BaO at 1 473 K in nitrogen atmosphere are increased by 0.49%, 1.45% and 2.99% compared with those
of the undoped BaO cermets, respectively. Moreover, the electric conductivities (21.98, 28.37 and 50.10 S/cm) of xNi/10NiO-NiFe2O4 cermets (x=5, 10, 17) doped with 1% BaO at 1 233 K are improved compared with those (18.70, 22.79 and 39.58 S/cm) of xNi/10NiO-NiFe2O4 cermets (x=5, 10, 17), respectively. This indicates that perhaps the addition of BaO or formation of BaFe2O4 and Ba2Fe2O5 has an active effect on electric conductivities of xNi/10NiO-NiFe2O4 (x=5, 10, 17) cermets. |
| |
Keywords: | Ni/10NiO-NiFe2O4 cermets BaO doping inert anode electric conductivity densification |
本文献已被 维普 万方数据 SpringerLink 等数据库收录! |
|