Pervoskite-type oxides LaFe_ 1-yCu_yO_3 was prepared by citrate method. Using a fluorescent Hg lamp as irradiator, the degradation experiments of acid red 3B were carried out in the suspension system of LaFe_ 1-yCu_yO...Pervoskite-type oxides LaFe_ 1-yCu_yO_3 was prepared by citrate method. Using a fluorescent Hg lamp as irradiator, the degradation experiments of acid red 3B were carried out in the suspension system of LaFe_ 1-yCu_yO_3. The results show that the doped oxides LaFe_ 1-yCu_yO_3 have good photocatalytic oxidation property. With the study of positron annihilation, its photocatalytic activity is mainly related with defect structures resulted by doping.展开更多
Based on experimental data of positron annihilation technology, electrolyticdissolution technique, electron back-scattered pattern, etc. and by analysis the strengtheningfactors, the strengthening mechanism of ultra-t...Based on experimental data of positron annihilation technology, electrolyticdissolution technique, electron back-scattered pattern, etc. and by analysis the strengtheningfactors, the strengthening mechanism of ultra-thin hot strip of low carbon steel produced by CSP(Compact Strip Production) technique was investigated. The value of each strengthening mechanism andits contribution percentage to yield strength were achieved. The results show that refinementstrengthening is the predominant strengthening mode; precipitation strengthening and dislocationstrengthening are second to it, their contributions to yield strength are almost equal.展开更多
文摘Pervoskite-type oxides LaFe_ 1-yCu_yO_3 was prepared by citrate method. Using a fluorescent Hg lamp as irradiator, the degradation experiments of acid red 3B were carried out in the suspension system of LaFe_ 1-yCu_yO_3. The results show that the doped oxides LaFe_ 1-yCu_yO_3 have good photocatalytic oxidation property. With the study of positron annihilation, its photocatalytic activity is mainly related with defect structures resulted by doping.
基金This work was financially supported by the state foundation for key projects: Fundamental Research on New Generation of Steels (No: G1998061500).
文摘Based on experimental data of positron annihilation technology, electrolyticdissolution technique, electron back-scattered pattern, etc. and by analysis the strengtheningfactors, the strengthening mechanism of ultra-thin hot strip of low carbon steel produced by CSP(Compact Strip Production) technique was investigated. The value of each strengthening mechanism andits contribution percentage to yield strength were achieved. The results show that refinementstrengthening is the predominant strengthening mode; precipitation strengthening and dislocationstrengthening are second to it, their contributions to yield strength are almost equal.
