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, ZHANG Xiao-jun, ZHANG Dong-en. Preparation of Fe (core)/SiO2 (shell) composite particles with improved oxidation-resistance[J]. Materials Research Bulletin, 2006, 41(8): 1424-1429. [9] ZHAO Y W...文章编号:1004-0609(2013)04-1065-08 溶胶-凝胶法制备SiO2包覆Fe85Si9.6Al5.4软磁复合粉末 李爱坤1,李丽娅1,吴隆文1,易健宏1, 2 (1. 中南大学 粉末冶金国家重点实验室,长沙 410083; 2. 昆明理工大学 材料科学与工程学院,昆明 650093) 摘要:采用溶胶-凝胶法,通过控制正硅酸乙酯(TEOS......
Electrorheological Performance of SiO2 Particle Materials of Ce-Doping and Adsorbed Chitosan ZHANG Yuanjing1,Xu Mingyuan2,Li Junran3,Shang Yanli3,Ma Shuzhen2,Zhang Shaohua4,Gao Song3,Li Shuxin3..., Beijing 100081, China) Abstract:The electrorheological(ER) materials of pure SiO2 ( Sample 1 ), Ce-doping SiO2 ( Ce-SiO2, Sample 2) and Ce-SiO2 adsorbed chitosan (Ce-SiO2-chitosan, Sample 3 ) were......
Influence of SiO2 Particles on Microstructures and Properties of Ni-W-P-CeO2-SiO2 Nano-Composite Coatings Wang Junli1,Guo Zhongcheng2,Wang Hua2,Xu Ruidong2 (1.Research Center for Analysis...) Abstract:Ni-W-P-CeO2-SiO2 nano-composite coatings were prepared on the carbon steel surface by pulse co-deposition of nickel, tungsten, phosphorus, nano-CeO2 and nano-SiO2 particles. The influence......
Anneal and Concentration Effect on PL Properties of Sol-Gel Derived Eu3+ Doped SiO2 Glass Zhu Huiqun1,Wang Yi1,Ling Langsheng2,Ding Ruiqin1 (1.Institute of Thin Film and Nano Materials, Wuyi University, Jiangmen 529020, China;2.Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China) Abstract:Eu3+ doped SiO2 nano-crystalline glasses were prepared......
球形SiO2颗粒的合成及反应机理 董景伟1,高美珍1,孙恕富1,张志荣1 (1.兰州大学物理科学与技术学院,兰州,730000) 摘要:利用Stober方法合成了球形SiO2颗粒.在乙醇和水的混合溶剂中,以正硅酸乙酯(TEOS)为硅源,氨水作催化剂,在40℃水浴下制备SiO2球形颗粒.通过改变反应物TEOS以及催化剂氨水的加入量,制备了不同粒径的球形SiO2颗粒.利用扫描电镜(SEM)可以看出,随着TEOS和氨水加入量的增加,SiO2颗粒的粒径增大,并探讨了其变化机理. 关键词:SiO2颗粒; 粒径; TEOS; 氨水; SiO2 particle; particle size; TEOS; ammonia; [全文内容正在添加中] ......
Effects of A Top SiO2 Surface Layer on Cavity Formation and Helium Desorption in Silicon Lü Yiying1,Alquier D2,Yin Lijun1,Liu Changlong1 (1.Department of Physics, School of Science, Tianjin... Technology, Institute of Advanced Materials Physics Faculty of Science, Tianjin 300072, China) Abstract:Cz n-type Si (100) samples with and without a top SiO2 layer were implanted with 40 keV helium ions......
particles is 1.644 KPa and the relative viscosity ηr(=ηE/η0) is 20.3 (under field strength E=4200 V*mm-1) while the adsorbed content of Y2(CO3)3 in the SiO2 particle materials is 12.4%(mass fraction...Preparation and Electrorheological Performance of SiO2 Particle Materials Adsorbed with YF3, Y2(CO3)3, Y2(C2O4)3 or YPO4 李淑新1,马淑珍1,李俊然2,张邵华3,许明远2,高松2 (1.Department of Chemistry, Baoding Teacher′s......
疏水型 SiO2气凝胶 陈玲燕1,吴爱梅2,魏建东1,邓忠生1,周斌1,沈军1,暴玉萍1,王珏1 (1.同济大学波耳固体物理研究所, 上海 200092;2.上海化工研究院, 上海 200062) 摘要:以多聚硅为硅源,通过溶胶-凝胶,表面修饰及超临界干燥过程制备出了疏水型SiO2气凝胶. 表面修饰后SiO2气凝胶孔洞由修饰前的23.1nm减小到18.2nm,比表面积由修饰前的477m2g-1增加到563m2g-1,骨架颗粒比修饰前略大,饱和水蒸汽吸附量由吸附前的0.04(重量比)降低到0.0012, 且与水不浸润. 关键词:疏水; SiO2气凝胶; 溶胶-凝胶; 表面修饰; 超临界干燥; hydrophobic; SiO2 aerogel; sol-gel; surface modification; super critical drying; [全文内容正在添加中] ......
SiO2基药物可控释放材料 游来江1,蒋燕1,向虹1,吴志坚1 (1.华侨大学材料科学与工程学院,泉州,362021) 摘要:综述了SiO2基药物可控释放材料,分析了简单,掺杂,杂化SiO2药物可控释放凝胶,以及介孔SiO2药物可控释放材料的特点,讨论了水和前驱物的比例,催化剂,掺杂剂,凝胶前驱物的种类,凝胶比表面积与孔径,凝胶尺寸及药物负载量,以及药物与凝胶基质及掺杂剂之间的相互作用对可控释放的影响.对于SiO2基药物可控释放材料来说,基质溶胀和基质溶解对药物可控释放的影响不大,药物扩散是释放的主要机制.基于介孔SiO2的pH敏感和光敏开关效应,为SiO2基药物可控释放材料提供了新思路. 关键词:SiO2凝胶; 介孔SiO2; 药物; 可控释放; 扩散; 开关效应; [全文内容正在添加中] ......
硅片抛光剂SiO2溶胶的制备和性能研究 温劲波1 (1.北京有色金属研究总院稀土材料国家工程研究中心,北京100088) 摘要:以NaOH和有机碱为介质,制成两种乳白色碱性SiO2溶胶,溶胶粒径在50~70nm范围,性能稳定.当SiO2浓度低于50%(质量分数),pH=8.5~11时,溶胶可以长时间存放而不沉淀分层.超微SiO2颗粒细制成的两种SiO2溶胶粘度低,能通过中速滤纸. 关键词:SiO2溶胶; 硅片抛光剂; 超微细; 稳定性; [全文内容正在添加中] ......