A Ti/Si complex zeolite has been prepared. X-ray diffraction and infrared spectrometry study has shown that two structures, namely the ZSM-5 and MCM-41, exist in the sample. BET tests have revealed that the complex ze...A Ti/Si complex zeolite has been prepared. X-ray diffraction and infrared spectrometry study has shown that two structures, namely the ZSM-5 and MCM-41, exist in the sample. BET tests have revealed that the complex zeolite contains regular mesopores of 2.6 nm. Ultraviolet spectrometry analysis has shown that the Ti species exist in the zeolite skeleton in the form of tetra-coordinate valence. The Ti/Si complex zeolite (TS-1/Ti-MCM-41) has apparently improved catalytic activity with respect to the macromolecular organic compound oxidation as compared to individual components of either Ti or Si containing zeolites (TS- 1 and Ti-MCM-41).展开更多
以不同脱氧方式熔炼的海洋工程用钢为研究对象,利用SEM、EDS及Image-Pro Plus 6.0软件对钢中夹杂物形貌、组成及尺寸分布等进行表征,通过3.5%NaCl溶液中阳极极化及腐蚀实验对钢中夹杂物诱发点蚀的行为进行探究。结果表明,与Al-Mg脱氧钢...以不同脱氧方式熔炼的海洋工程用钢为研究对象,利用SEM、EDS及Image-Pro Plus 6.0软件对钢中夹杂物形貌、组成及尺寸分布等进行表征,通过3.5%NaCl溶液中阳极极化及腐蚀实验对钢中夹杂物诱发点蚀的行为进行探究。结果表明,与Al-Mg脱氧钢相比,Ti-Mg脱氧钢中形成了含有TiO_x的复合氧化物,夹杂数量更多且平均尺寸更小(小于1μm),有利于MnS的异质形核析出及弥散分布;低腐蚀活性的含TiOx复合氧化物及高度分散、异质局部析出MnS夹杂具有较低的点蚀敏感性及自腐蚀催化作用,降低了点蚀的诱发及扩展,有效提高了钢的抗点蚀性能。展开更多
文摘A Ti/Si complex zeolite has been prepared. X-ray diffraction and infrared spectrometry study has shown that two structures, namely the ZSM-5 and MCM-41, exist in the sample. BET tests have revealed that the complex zeolite contains regular mesopores of 2.6 nm. Ultraviolet spectrometry analysis has shown that the Ti species exist in the zeolite skeleton in the form of tetra-coordinate valence. The Ti/Si complex zeolite (TS-1/Ti-MCM-41) has apparently improved catalytic activity with respect to the macromolecular organic compound oxidation as compared to individual components of either Ti or Si containing zeolites (TS- 1 and Ti-MCM-41).
文摘以不同脱氧方式熔炼的海洋工程用钢为研究对象,利用SEM、EDS及Image-Pro Plus 6.0软件对钢中夹杂物形貌、组成及尺寸分布等进行表征,通过3.5%NaCl溶液中阳极极化及腐蚀实验对钢中夹杂物诱发点蚀的行为进行探究。结果表明,与Al-Mg脱氧钢相比,Ti-Mg脱氧钢中形成了含有TiO_x的复合氧化物,夹杂数量更多且平均尺寸更小(小于1μm),有利于MnS的异质形核析出及弥散分布;低腐蚀活性的含TiOx复合氧化物及高度分散、异质局部析出MnS夹杂具有较低的点蚀敏感性及自腐蚀催化作用,降低了点蚀的诱发及扩展,有效提高了钢的抗点蚀性能。