本文基于一维纳米材料的气—液—固(Vapor-Liquid-Solid,VLS)生长机理,采用简单的物理气相沉积法,以硒化铟(In_(2)Se_(3))粉末为前驱体,在镀金(Au)的泡沫钛基底上实现生长出高密度的一维In_(2)Se_(3)纳米棒.通过扫描电子显微镜(Scanning...本文基于一维纳米材料的气—液—固(Vapor-Liquid-Solid,VLS)生长机理,采用简单的物理气相沉积法,以硒化铟(In_(2)Se_(3))粉末为前驱体,在镀金(Au)的泡沫钛基底上实现生长出高密度的一维In_(2)Se_(3)纳米棒.通过扫描电子显微镜(Scanning Electron Microscope,SEM)的结果表明,相比于普通的单晶硅基底,在泡沫钛基底上生长的一维In_(2)Se_(3)纳米棒具有更高的密度,且泡沫钛基底能够重复使用,在提高制备效率的同时极大降低了制备成本.展开更多
Preliminary experimental studies on evaporation of Gengnian’an liquid extract of traditional Chinese medicine(TCM)with vapor-liquid-solid flow boiling technique were carried out in a transparent natual circulating th...Preliminary experimental studies on evaporation of Gengnian’an liquid extract of traditional Chinese medicine(TCM)with vapor-liquid-solid flow boiling technique were carried out in a transparent natual circulating three-phase evaporator. The height of the heating tube is 2.5 m with an inner diameter of 0.038 m and an outer diameter of 0.045 m. The cylindrical solid particles with a diameter of 0.0025 m and a length of 0.0025 m is made of a kind of inert material that does not interact with the liquid of Gengnian’an. The heat energy for the evaporator was supplied by the electric heating system. It was shown that the presence of the solid particles could enhance the process of heat transfer since the heat transfer coefficients in vapor-liquid-solid boiling system was about 1.5-2.0 times that of the vapor-liquid boiling system when the heat flux was constant. On the other hand,fouling prevention and a lower wall temperature were also seen when the solid particles were present. The quality of concentrated liquid of TCM would be improved.展开更多
文摘本文基于一维纳米材料的气—液—固(Vapor-Liquid-Solid,VLS)生长机理,采用简单的物理气相沉积法,以硒化铟(In_(2)Se_(3))粉末为前驱体,在镀金(Au)的泡沫钛基底上实现生长出高密度的一维In_(2)Se_(3)纳米棒.通过扫描电子显微镜(Scanning Electron Microscope,SEM)的结果表明,相比于普通的单晶硅基底,在泡沫钛基底上生长的一维In_(2)Se_(3)纳米棒具有更高的密度,且泡沫钛基底能够重复使用,在提高制备效率的同时极大降低了制备成本.
基金国家青年科学基金 (No 2 0 10 60 12 )天津市科委中药现代化专项基金 (No 0 13 10 86112 )+1 种基金天津市131人才引进基金天津大学青年教师科研启动基金~~
文摘Preliminary experimental studies on evaporation of Gengnian’an liquid extract of traditional Chinese medicine(TCM)with vapor-liquid-solid flow boiling technique were carried out in a transparent natual circulating three-phase evaporator. The height of the heating tube is 2.5 m with an inner diameter of 0.038 m and an outer diameter of 0.045 m. The cylindrical solid particles with a diameter of 0.0025 m and a length of 0.0025 m is made of a kind of inert material that does not interact with the liquid of Gengnian’an. The heat energy for the evaporator was supplied by the electric heating system. It was shown that the presence of the solid particles could enhance the process of heat transfer since the heat transfer coefficients in vapor-liquid-solid boiling system was about 1.5-2.0 times that of the vapor-liquid boiling system when the heat flux was constant. On the other hand,fouling prevention and a lower wall temperature were also seen when the solid particles were present. The quality of concentrated liquid of TCM would be improved.
