Co-electrodeposition of lanthanum with nickel from aqueous solution withEDTA as complexing agent was studied. Ni-La alloy coating containing La up to 22.58wt%was obtained. Flom the results of the experiments it was be...Co-electrodeposition of lanthanum with nickel from aqueous solution withEDTA as complexing agent was studied. Ni-La alloy coating containing La up to 22.58wt%was obtained. Flom the results of the experiments it was believed that the codepositionof La with Ni belongs to the inductive codeposition mechanism. By XPS analysis thevalences of both La and Ni in the obtained alloy coatings were to be zero. It was provedtbIough the analysis and calculation of the XRD data that all the Ni-La alloy coatingsin which La content was equal to or less than 22.58wt% were in crystalline structure ofdisplacement solid solution.展开更多
通过共沉淀法合成了发红色荧光的类水滑石材料,采用硅烷偶联剂对其进行了表面改性,并利用荧光光谱、红外光谱、X射线衍射(XRD)和扫描电子显微镜(SEM)等对其结构和性能进行了表征,探讨了表面改性对荧光类水滑石的影响.将改性荧光类水滑...通过共沉淀法合成了发红色荧光的类水滑石材料,采用硅烷偶联剂对其进行了表面改性,并利用荧光光谱、红外光谱、X射线衍射(XRD)和扫描电子显微镜(SEM)等对其结构和性能进行了表征,探讨了表面改性对荧光类水滑石的影响.将改性荧光类水滑石与发射波长为384 nm的In Ga N芯片组合制成发光二极管,器件发出明亮的红光.研究结果表明,改性的发红色荧光的类水滑石是制作白光二极管可供选用的红色发光材料.展开更多
In this paper, polycrystalline powders of LaFeO3 have been Prepared by the decomposation of mixed nitrates with and without various complexing agents respectively. The Phase changes at different temperatures have been...In this paper, polycrystalline powders of LaFeO3 have been Prepared by the decomposation of mixed nitrates with and without various complexing agents respectively. The Phase changes at different temperatures have been investigated by XRD, TG, DTA and IR. The effects of adding complexing agent, citric acid, HAC and EDTA, on the formation of single phase LaFeO3 have been discussed. The formahon of single phase perovskite-type LaFeO3 are favoured by adding vedous complexing agents. The favourable order for the formations of LaFeO3 is that citric acid＞HAC≈EDTA.展开更多
文摘Co-electrodeposition of lanthanum with nickel from aqueous solution withEDTA as complexing agent was studied. Ni-La alloy coating containing La up to 22.58wt%was obtained. Flom the results of the experiments it was believed that the codepositionof La with Ni belongs to the inductive codeposition mechanism. By XPS analysis thevalences of both La and Ni in the obtained alloy coatings were to be zero. It was provedtbIough the analysis and calculation of the XRD data that all the Ni-La alloy coatingsin which La content was equal to or less than 22.58wt% were in crystalline structure ofdisplacement solid solution.
文摘通过共沉淀法合成了发红色荧光的类水滑石材料,采用硅烷偶联剂对其进行了表面改性,并利用荧光光谱、红外光谱、X射线衍射(XRD)和扫描电子显微镜(SEM)等对其结构和性能进行了表征,探讨了表面改性对荧光类水滑石的影响.将改性荧光类水滑石与发射波长为384 nm的In Ga N芯片组合制成发光二极管,器件发出明亮的红光.研究结果表明,改性的发红色荧光的类水滑石是制作白光二极管可供选用的红色发光材料.
文摘In this paper, polycrystalline powders of LaFeO3 have been Prepared by the decomposation of mixed nitrates with and without various complexing agents respectively. The Phase changes at different temperatures have been investigated by XRD, TG, DTA and IR. The effects of adding complexing agent, citric acid, HAC and EDTA, on the formation of single phase LaFeO3 have been discussed. The formahon of single phase perovskite-type LaFeO3 are favoured by adding vedous complexing agents. The favourable order for the formations of LaFeO3 is that citric acid＞HAC≈EDTA.
