搜索结果: 91-105 共查到“知识库 材料科学其他学科”相关记录791条 . 查询时间(1.862 秒)
将环氧改性有机硅(EA)与Al粉按质量比(3:2)形成EA/40%Al低红外发射率复合涂层, 研究了固化温度对EA/40%Al复合涂层耐腐蚀性能的影响及其机理。利用扫描电镜观察涂层的形貌, 并通过动电位极化技术及耐腐蚀实验对涂层的耐腐蚀性能进行了表征。结果表明, 在保证低发射率前提下, 固化温度为200℃时, 涂层的耐盐雾、耐人工加速老化和耐湿热腐蚀性能时间均能达到2000 h, 基本满足工程应用...
Synthesis of Y2O2S:Eu3+, Mg2+, Ti4+ hollow microspheres via homogeneous precipitation route
Synthesis of Y2O2S Eu3+ Mg2+ Ti4+ hollow microspheres via homogeneous precipitation route
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2010/10/12
A phosphorescent material in the form of Y2O2S:Eu3+, Mg2+, Ti4+ hollow microspheres was prepared by homogeneous precipitation using monodispersed carbon spheres as hard templates. Y2O3:Eu3+ hollow mic...
Water distribution at solid/liquid interfaces visualized by frequency modulation atomic force microscopy
Water distribution solid/liquid interfaces visualized frequency modulation atomic force microscopy
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2010/10/12
Interfacial phenomena at solid/water interfaces play an important role in a wide range of industrial technologies and biological processes. However, it has been a great challenge to directly probe the...
Large-area fabrication of superhydrophobic surfaces for practical applications: an overview
Large-area fabrication superhydrophobic surfaces practical applications
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2010/10/12
This review summarizes the key topics in the field of large-area fabrication of superhydrophobic surfaces, concentrating on substrates that have been used in commercial applications. Practical approac...
助熔剂BBSZ对M型钡铁氧体的低温共烧改性研究
无机非金属材料 低温共烧陶瓷 M型钡铁氧体 助熔剂
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2010/8/19
研究了助熔剂BBSZ对M型钡铁氧体的低温共烧改性。结果表明, 添加适量的BBSZ助烧剂可以使钡铁氧体材料在900℃完成烧结,所得样品具有较好的致密化结构。当BBSZ的掺入量为2\%时(质量分数), 材料的磁特性较好, 完全实现了M型钡铁氧体的低温烧结, 磁性参数值有一定改善。
机械化学法一步合成表面改性氧化锌纳米粉体
机械化学法 氧化锌 表面改性
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2010/8/19
以醋酸锌、氢氧化钠、硬脂酸为原料, 采用机械化学法,一步制备出具有表面亲油性能的氧化锌粉体。借助XRD、FT--IR、TEM、纳米粒度测试等方法对粉体进行了表征, 研究了硬脂酸对氧化锌粉体表面改性的机理。结果表明, 硬脂酸中的羧基与氧化锌颗粒表面的羟基发生了酯化反应, 并在表面形成有机膜, 氧化锌粉末由亲水性转化为亲油性。当球磨时间为50 min、硬脂酸加入量为氧化锌质量的4.5%时, 可以得到平...
进行了聚苯胺溶出液、聚苯胺粉末和聚苯胺复合漆膜的抗菌性实验, 用FT--IR检测了溶出液的成分, 研究了本征态聚苯胺和掺杂态聚苯胺对大肠杆菌、金黄色葡萄球菌、白色念珠菌和枯草芽孢菌的抗菌性能及其随作用时间的变化,研究了与聚苯胺作用前后细菌的形貌变化以及聚苯胺的抗菌机制。
O--季铵化--N, N--双十二烷基壳聚糖/胆固醇的混合单分子膜性质研究
壳聚糖 衍生物 胆固醇 单分子膜
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2010/8/19
制备O--季铵化--N,N--双十二烷基壳聚糖, 用FTIR、EA、1H NMR对其进行表征, 并研究其与胆固醇的混合单分子膜性质。结果表明,随着胆固醇的摩尔分数从0.2增加到0.8, O--季铵化--N,N--双十二烷基壳聚糖/胆固醇混合单分子膜的极限分子占据面积Aex及崩溃压πc逐渐减小。混合单分子膜两组分分子间的作用力从相互吸引作用转变为相互排斥作用的转折点出现在胆固醇的摩尔分数为0.4时...
超临界CO2中CS--g--PDLLA的合成及其与PDLLA多孔支架材料的原位构建
复合材料 超临界CO2 壳聚糖 聚乳酸 共聚 多孔支架 原位构建
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2010/8/19
首先以辛酸亚锡为催化剂, 消旋丙交酯(D,L-LA)与壳聚糖(CS)为原料, 在超临界二氧化碳(scCO2)中合成了以PDLLA为基体、CS--g--PDLLA共聚物为填充相的共混体系, 然后通过scCO2萃取/致孔技术原位构建了CS--g--PDLLA/PDLLA多孔支架材料。对共聚物的结构与性能、PDLLA的分子量进行了表征, 对多孔支架的结构形态进行观察, 并对支架材料的孔隙率进行测定。结果...
An investigation of machining efficiency of internal roller burnishing
An investigation machining efficiency internal roller burnishing
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2010/8/12
Fine machining process of cylindrical surfaces exposed to the high exploitation loadings has to ensure acceptable surface quality and it’s as longer functionality. In the last decades, selection of th...
Wear of plasma nitrided and nitrocarburised AISI 316L austenitic stainless steel
Wear of plasma nitrided nitrocarburised AISI 316L stainless steel
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2010/8/12
The use of coatings and surface engineered components is increasing and is driven by the need for improved hardness, corrosion and wear resistance [1]. Austenitic stainless steels are the most importa...
Shipbuilding pipeline production quality improvement
Shipbuilding pipeline production quality improvement
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2010/8/12
Failure Mode and Effect Analysis (FMEA) is a systematic method to detect and prevent problems in the product or in the manufacturing process before they arise [1]. The FMEA method focuses on preventio...
Parameter identification of a fullcar model for active suspension design
Parameter identification fullcar model active suspension design
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2010/8/12
System identification is the art of determining a model of a dynamical process by combining information obtained from experimental data with that derived from an a priori knowledge of the physical beh...
Application of thermovision method to welding thermal cycle analysis
Application thermovision method welding thermal cycle analysis
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2010/8/12
Indirect investigations of temperature by infrared method depend on measurement infrared radiation emitted by applied object. The detection circuit of system transforms this radiation into electric si...
低碳经济的发展促使纸蜂窝材料走俏市场
低碳经济 发展 纸蜂窝材料
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2010/8/10
近年来，高新技术成果交易会、高端论坛或博览会劲吹新风，“绿色”氛围一届胜过一届，各种以减排、低碳经济为主题的技术和产品，显示着人类对环境恶化的焦虑，也预示低碳经济的发展将成为不可阻挡的潮流。“低碳经济”已成为人们最为热门的话题。