排序方式: 共有31条查询结果,搜索用时 15 毫秒
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现存的香坊火车站建于民国十四年(1925年),是哈尔滨市优秀的近代建筑.2007年,被公布为哈尔滨市一类保护建筑.该文在现场调查和查阅相关文献基础上,深入剖析其选址规划、平面设计、空间设计、立面设计、结构构造、装饰设计等内容,揭示了香坊火车站的建筑和空间特征,旨在探究其作为近代典型铁路建筑的历史价值. 相似文献
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利用等离子体增强磁控溅射离子镀(PEMSIP)技术在铁基体上沉积TiN涂层之前,先镀一层很薄的钛中间层,继之再沉积TiN。研究了基片负偏压对涂层相组成的影响。结果表明,随着基片负偏压增加,膜层的相分朝着富氮相及其含量增加的方向发展,变化趋势为(α-Ti+Ti_2N+TiN)→(Ti_2N+TiN)→TiN。在基体与中间层界面处有FeTi相;在中间层与后继膜的交接处,发现α=1与Ti_2N有取向关系。 相似文献
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Zuming He Hanpei Yang Ngie Hing Wong Lusi Ernawati Jaka Sunarso Zhengyi Huang Yongmei Xia Yong Wang Jiangbin Su Xiaofei Fu Mi Wu 《Small (Weinheim an der Bergstrasse, Germany)》2023,19(18):2207370
Water pollution caused by the massive use of medicines has caused significant environmental problems. This work first reports the synthesis and characterization of the Cu7S4/CuCo2O4 (CS/CCO) yolk–shell microspheres via hydrothermal and annealing methods, and then investigates their photocatalytic performance in removing organic water pollutants. The 10-CS/CCO composite with yolk–shell microspheres exhibits the highest photodegradation rate of carbamazepine (CBZ), reaching 96.3% within 2 h. The 10-CS/CCO also demonstrates more than two times higher photodegradation rates than the pure (Cu7S4) CS and (CuCo2O4) CCO. This outstanding photocatalytic performance can be attributed to the unique yolk–shell structure and the Z-scheme charge transfer pathway, reducing multiple reflections of the acting light. These factors enhance the light absorption efficiency and efficiently transfer photoexcited charge carriers. In-depth, photocatalytic degradation pathways of CBZ are systematically evaluated via the identification of degradation intermediates with Fukui index calculation. The insights gained from this work can serve as a guideline for developing low-cost and efficient Z-scheme photocatalyst composites with the yolk–shell structure. 相似文献
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以六偏磷酸钠在水相中分散纳米氧化锌,并将其添加到炻瓷砖原料中。研究了纳米ZnO的添加量对炻瓷砖的烧结温度、保温时间和烧结后性能的影响。结果表明,在瓷砖粉料中添加纳米氧化锌可显著降低炻瓷砖的烧结温度并缩短保温时间。通过对瓷砖吸水率、破坏强度及尺寸的测量,得出随纳米氧化锌添加量的增加,瓷砖吸水率显著降低,破坏强度升高,而瓷砖尺寸有明显的收缩,使得瓷砖结构致密化。最佳的实验条件是:烧结温度为1050℃,纳米氧化锌浓度为3%,烧结段保温时间为9min。通过对不同烧结温度下材料的相组成进行分析,发现添加纳米氧化锌促进了堇青石(Mg2Al4Si5O18)的分解或加合,促进了锌铝尖晶石(ZnO.Al2O3)和鳞石英的形成,且随着添加量增加,堇青石加合、锌铝尖晶石和鳞石英形成的温度降低,有利于炻瓷砖的烧结。 相似文献
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