These two dispersants can ameliorate dispersing state of cu - zn powders and solve the problem of agglomeration reasonably in the process of preparation . this provides with foundation for application of cu - zn ultrafine powders and study on dispersant for ultrafine powders 这两种分散剂可改善铜锌粉的分散状态，较好地解决制备过程中的团聚问题，这为超细铜锌粉的应用提供了条件，为超细粉末分散剂的研究提供了重要依据。
Ultrafine powder , the high quality ultrafine power has been got . ( 2 ) the perfect rutile has been got with flame fusion method in developed domestic sjz sintering machine , and the technology of crystal growth has been clearly analyzed . in the end the suitable techniche has been got on the basis of systemic study on the conditions of growth 通过对晶体生长中的籽晶方向、气氛等的作用的大量深入的研究，得出了金红石晶体焰熔法生长现阶段的最佳工艺条件，即籽晶( 001 )在氢氧比为1 ： 1的附近，通过加氢进行扩肩，然后在1450加氧退火24hr后就能够获得完整透明的金红石单晶。
Through preparative experiments and optimized experiments on cu ~ zn ultrafine powders that are prepared by the method of thermal spray and ball milling , the author finds that dispersants concentration , dispersing time , ph , temperature and adscititious ions have significant influences on dispersing effects 西安理工大学硕士学位论文通过对热喷涂球磨法制备的超细铜锌粉的分散性进行预试验和优化试验，发现分散剂浓度、分散时间、 ph值、温度和外加离子浓度对分散作用效果有重要影响。
Abstract : study is made of recovery of organic reagents during the preparation of ultrafine powder by metal alcoxides hydrolysis . the phase diagrams of isopropanol - benzene system and isopropanol - benzene - water system have been plotted , based on which , isopropanol and benzene can be recovered and recirculated by distillation - rectification process . the recovery and reused rate of alcohol and benzene are above 75 % . so both the environmental pollution and cost of ultrfine powder are reduced 文摘:对醇盐水解法制备超细粉末过程中有机试剂的回收进行了研究，绘制了异丙醇-苯的二元相图和异丙醇-苯-水的三元相图，在此基础上采用蒸馏-精馏的方法对制备体系中的异丙醇和苯进行回收，将有机试剂循环使用，使醇和苯的回收利用率达75 %以上，因而减少了环境污染，并降低了粉末成本。
Abstract : this paper dicussed the preparative parameteres synthesized mullite ultrafine powder by sol - gel and co2 scfd ( supercritieal fluid drying ) method from teos and al ( no3 ) 3 ? 9h2o as raw materials . the control parameteres of the colloidal particle size forming in sol - gel process and the gel structure and the scfd were studied by , xrd , tem and bet techmiques 文摘:研究了以正硅酸乙酯和硝酸铝为原料，采用溶胶一凝胶法结合co2超临界流体低温干燥技术合成莫来石超细粉的制备参数控制，并利用xrd 、 tem和bet 、技术研究了溶胶-凝胶过程中溶胶胶粒大小的控制和凝胶结构的控制及超临界流体干燥技术的控制。
The hexagonal barexfe , 2 . xo , , ( re denote la ^ nd > sm and gd ) ultrafine powders with m - type structure were firstly synthesized by a novel technique - - - - - - sol - gel combustion synthesis method which combines sol - gel method with low temperature combustion synthesis method . based on theoretical analysis and experimental study , the effects of the composition of the gel , the different kinds of intermediate , strength of solution , the amount of complexing agent , the different kinds of anions , the adding of dispersant , auto - propagating combustion and the condition in heat treatment of the gel on crystal phase , particle size , morphology and magnetic properties of bare ^ fe ^ o , , ultrafine powders were firstly investigated systematically to clarify the optimum forming conditions 本研究是在前人工作的基础上，同时从制备方法和掺杂元素两方面着手，以保证制备的粉体材料具有优异的性能，即首次利用溶胶?凝胶湿化学合成法和低温燃烧合成法相结合的一种兼具二者优点的超细粉末新型合成技术? ?溶胶-凝胶燃烧合成法来完成稀土元素掺杂钡铁氧体bare _ xfe _ ( 12 - x ) o _ ( 19 ) ( re为la 、 nd 、 sm 、 gd )超细粉末的制备。
By the method of orthogonal experiment , this paper optimizes the formulae of dispersants and analyzed kinds of factors that affect dispersing properties . the action mechanism of different dispersants is discussed and the best action conditions of these dispersants are presented . this improves the dispersing stability of cu - zn ultrafine powders and provides with effective methods for the preparation of ultrafine powders with steady properties 采用正交试验方法优化了分散剂配方，分析了影响分散性能的各种因素，讨论了各种分散剂的作用机理，找到了不同分散剂的最佳作用条件，从而提高了超细铜锌粉的分散稳定性，为得到性质稳定的超细粉体提供了有效途径。
The results show that all of them have little different effect on the crystalline size of ultrafine powder of a - ahc ^ , but they have greatly different effect on the secondary partical size . the azeotropic distillation is the most effective processing , it can prevent the formation of hard agglomerates and improve the sinter - ability of powder . the mechanism of drying stages preventing the formation of hard agglomerates has investigated 研究了三种不同的干燥方法(直接干燥法、酒精置换干燥法和共沸蒸馏干燥法)对粉体性能的影响。实验表明三种干燥方法对- al _ 2o _ 3粉体的一次粒径的差别性影响不显著，而对其二次粒径的差别性影响则很显著。
