Homogeneous needle-like colloid particles γ-Fe_2O_3, as a kind of magnetic record material, are more and more widely applied.
均匀针状的γ-Fe_2O_3胶体粒子作为一种磁记录材料已经被越来越广泛应用,其制备一般要求在具有防尘设备的严格实验条件下进行,使其成本较高,因而限制了它的推广。
Morphology control of needle-like magnesium hydroxide nanoparticles;
针状纳米氢氧化镁的形貌控制
Production and application of needle-like nano-CaCO_3;
针状纳米级碳酸钙的工业生产与应用
Production of needle-like nano-CaCO_3 by non-refrigerating carbonization;
非冷冻碳化法工业化生产针状纳米碳酸钙
A new type of needle α-Fe2O3 coated titania composite particles were prepared via the colloidal method and characterized by XRD,TEM,and EDS methods respectively.
采用溶胶法制备了针状α-Fe2O3包覆二氧化钛的复合纳米颗粒,并通过透射电镜(TEM)、X射线衍射(XRD)、能谱元素分析(EDS)对产物形貌和晶相组成进行了表征,对其形成机理进行了初步分析。
Experimental results showed that: the period of reaction was greatly shorted under microwave radiaton ; beside , while the molar ratio of FeCl_3 and NaH_2PO_4 were 200 and 250 , we obtained uniform spheral and acicular nanometer particles respectively ; The diameter of particles were about 20nm .
采用微波辅助法由FeCl3溶液在晶体助长剂NaH2PO4的存在下制备出了针状和球状的α-Fe2O3纳米粒子。
Acicular barium ferrite, which was prepared by topotactic reaction between barium carbonate, aciculargoethite with the aspect ratio of 14 and the average length of 500nm and some doping ions, were characterized byXRD, TEM and TG-DTA.
采用α-FeOOH(平均长度为50nm,平均轴比为14)和BaCO_3 及添加离子经局部规整反应制备针状钡铁氧体。
By observing microstructures , we find they may form spheroidal A,acicular A and feathery A .
组织观察发现,除形成球状A、针状A外,还形成羽毛状A。