Results 1 to 10 of about 3,758 (98)
Zhejiang Daxue xuebao. Lixue ban, 2004 以四氯化钛(TiCl4)为原料,采用3种不同的沉淀剂制备了纳米二氧化钛粉体.用TG-DTA和FT-IR对前驱体进行了分析.结果表明,不同沉淀剂导致粉体表面状态不同.以乙酸和尿素为沉淀剂的粉体表面不仅沉淀剂可以形成化学吸附,水分子也参与反应并在粉体表面形成-OH基团,而以EDTA为沉淀剂的粉体表面只吸附沉淀剂.煅烧后,用TEM对颗粒形貌进行了表征.实验发现,以EDTA为沉淀剂制备的粉体分散性优于其他沉淀剂制备的二氧化钛颗粒.这些差异主要是由于沉淀剂的性质及其在粉体表面的吸附状态不同.
LIUBo(刘波) +5 more
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Gongye shui chuli, 2022 硫酸根难以稳定高效去除，造成浓缩、蒸发单元结垢是工业废水零排放系统面临的主要难题之一。以脱硫废水为研究对象，开展了钙矾石法深度去除硫酸根与沉淀物沉降条件优化研究，系统分析了初始n（Ca2+）/n（SO42-）（ICS）、n（Al3+）/n（SO42-）（IAS）和混合条件的影响机制，利用扫描电镜、X 射线衍射等手段对沉淀物进行了表征。结果表明，钙矾石沉淀法的硫酸根去除率可达99.5%；由于形成沉淀物的Zeta电位较高，静电斥力影响了沉淀物颗粒的聚集，造成沉降性能恶化 ...
徐敏 +7 more
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Gongye shui chuli, 2017 研究采用两段沉淀法处理含氟尾气和废水及固废减量化技术，一段沉淀以理论量95%~105%石灰乳为沉淀剂，将含氟废水中的95%以上的氟离子沉淀除去；二段沉淀以理论量150%~200%的石灰乳为沉淀剂，并用盐酸调节pH至中性，两段沉淀后的废水F-质量浓度为8~12 mg/L。该项技术具有沉淀剂用量少、沉降速度快、过滤性能好、滤饼含水率低和固废量少的优点，值得进行推广应用。
钱雪明 +7 more
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Gongye shui chuli, 2005 介绍了新型同向流斜板沉淀池处理工艺，分析了新型同向流斜板沉淀池对悬浮物的去除情况，并与传统同向流斜板沉淀池进行比较。中试实验结果表明，新型同向流斜板沉淀池能很好地解决泥水分离问题，不存在传统同向流斜板沉淀池清水收集管易被堵塞现象，而且当表面负荷在30m3/(m2·h)时，SS去除率达98%以上，沉淀效率高于异向流沉淀池，为同向流斜板沉淀池的工程化应用开辟了广阔的前景。
张永亮, 刘凡清, 朱臻
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT NiCoCrAlYTa coatings are widely used as bond coats in thermal barrier coating (TBC) systems for gas turbines and aeroengines to provide oxidation resistance and support the formation of a protective thermally grown oxide (TGO). Herein, high‐current pulsed electron beam (HCPEB) modification was utilized to strengthen a NiCoCrAlYTa coating by ...
Xiangcheng Li +6 more
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT The performance optimization of ultrahigh‐strength Cu‐15Ni‐8Sn alloy relies on controlling recrystallization and aging precipitation, which are two thermally activated processes constrained by high activation barriers. Conventional heat treatment requires elevated temperatures and prolonged holding time, inevitably leading to grain coarsening ...
Fei Tan +10 more
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Gongye shui chuli, 2015 分别针对沉淀池进水、沉淀池中部水样、沉淀池出水开展了超滤中试试验,研究了在不同混凝沉淀段位耦合时超滤膜出水水质的变化情况以及超滤膜的污染特性。结果表明,对于浊度、CODMn、UV254等水质指标而言,不同段位混凝沉淀-超滤的耦合工艺对水质的净化作用基本相当。但从膜污染上看,耦合段位设置在沉淀池进水端时,超滤膜的污染非常严重;而设置在出水端则可明显减缓膜污染;将耦合段位设置在沉淀池中部时,膜污染速率虽略有升高但幅度不大,同时可以显著减小水厂的占地面积。
谢义忠 +8 more
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Uncovering Cu Involved Nanophase Structures and Transformation in a Novel 7075B Aluminum Alloy
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT In this study, aberration‐corrected transmission electron microscopy combined with first‐principles calculations was employed to systematically investigate the Cu‐involved crystal structures and evolution mechanisms of nanoprecipitates in a novel 7075B Al alloy. Firstly, an atomic model of the early‐stage GP‐ηp structure together with specific
Deyu Zhang +13 more
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT A facile coprecipitation‐pyrolysis strategy was employed to fabricate Cu/Co nanoparticles (NPs) embedded in nitrogen‐doped carbon matrices (Cu/Co@N‐C) through the carbonization of CuCo‐MOF precursors. Moreover, monometallic counterparts of Cu@N‐C and Co@N‐C were also prepared via carbonization of bimetallic CuZn‐MOF and CoZn‐MOF, respectively.
Weinan Yao +7 more
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Gongye shui chuli, 2002 在桥口油田污水改性处理工艺中，因产出污泥量过大，导致密闭处理系统内污泥堵塞严重，沉降效果变差。而在密闭处理流程前端串入平流沉淀池以后，污泥沉降前移，彻底解决了密闭流程污泥堵塞难题，整个系统处理效果显著提高。平流沉淀池具有沉降效率高、处理效果直观、结构简单、成本低等优点。沉淀池应采用双池串联设计布局，其结构要根据污水处理流量、杂质含量、沉降时间等参数合理设计，应达到两极沉降、高效适用的目的。同时，沉淀池要建有完善的排污系统 ...
滕庆勇, 姜学明, 叶俊
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