溶胶-凝胶法制备CaSiO_3:Eu^(3+)Bi^(3+)

采用溶胶-凝胶法制备出了CaSiO_3:Eu^(3+)Bi^(3+),利用DTA样品进行了检测并分析了其反应过程。XRD谱图表明:在CaSiO_3中少量掺杂Eu^(3+)、Bi^(3+)并没有改变其晶体结构。

Study on corrosion resistance of pure magnesium with CaSiO_3 contained coating in NaCl solution

A composite coating was fabricated on pure magnesium by hydrothermal treatment in order to reduce its degradation in body environment. The coating was character- ized by scanning electron microscopy （SEM） and X-ray diffraction （XRD）. The XRD pattern showed that the main composition of the coating was a mixture of CaSiO3, MgSiO3 and Mg（OH）2. Electrochemical test showed that the corrosion current den- sity （icor~） of the coated magnesium was decreased by about two orders of magnitude compared with that of the bare magnesium, and the EIS measurement also showed that the corrosion resistant performance of the coated magnesium was significantly enhanced. Meanwhile, weight loss test showed that the weight loss of the coated magnesium was lower than that of the bare magnesium. Hence, the present study indicated that the composite coating could greatly slow down the degradation of pure magnesium.