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直浇道内浇道浇注系统大孔出流的研究(二) 被引量:1
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作者 魏兵 袁森 《铸造技术》 CAS 北大核心 1991年第2期39-42,共4页
本文根据大孔出流理论、水模拟试验。给出了直一内二单元浇注系统内浇口出流的实际作用压头和速度的计算公式,并对直浇道的正压充满程度进行了定量分析。
关键词 浇注系统 直交道 交道 大孔出流
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Perpendicular intergrowth ZSM-5 plates with shortened 10-MR pores 被引量:2
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作者 Ensheng Zhan Zhiping Xiong +4 位作者 Yan Zhou Mingrun Li Pengfei Wang Weibin Fan Wenjie Shen 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2020年第7期1132-1139,共8页
ZSM-5 plates with a perpendicular intergrowth structure was synthesized by using a simple amine as the structure directing agent under hydrothermal conditions,in which the mother plate and the perpendicularly standing... ZSM-5 plates with a perpendicular intergrowth structure was synthesized by using a simple amine as the structure directing agent under hydrothermal conditions,in which the mother plate and the perpendicularly standing plates oriented along the(010)and(100)planes of MFI crystals,respectively.During the crystallization process,the mother plate was initially formed on the surface of the amorphous solid gel,while a set of parallel plates perpendicularly grew on its surface,via a homogeneous nucleation mechanism.The mother plate and the perpendicular plates had a similar thickness of 100-200 nm and were characterized by considerably shortened straight and zigzag 10 member ring pores,respectively.This unique intergrowth structure greatly facilitated the diffusion of the reactive molecules in HZSM-5 crystals during methanol conversion to hydrocarbons. 展开更多
关键词 ZSM-5 Plate structure Perpendicular Intergrowth Channel length Hierarchical structure Molecule diffusion
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