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The influence of double carburization upon the microstructure of WC powder is investigated by adopting of different tungsten oxides.

通过对不同氧化钨前驱氧化物的采用,研究两步碳化法对 WC粉末微观结构的影响,在国内首次探讨 WC粉末中生长孪晶的形成机制及其结构特点,阐述生长孪晶对硬质合金性能的影响。

The effect of six types of powder activated carbon on decolorizing of maltose solution was studied.

研究了六种不同的粉末活性炭对麦芽糖液的脱色效果,结果表明,粉末活性炭F的脱色效果较好,且对麦芽糖液中的色素吸附符合Freundlich方程。

Pore structure experiment shows that porosity of high volume fine mineral mixture RPC is about 5%, the pore distribution is uniform and the main pore is small. When the cement content of high volume fine mineral mixture RFC is 300 kg/m^3, its sclerotium hydration products is dense packed by irregular equal Ⅲ style C-S-H gels. The gels are fine, dense, and integrate with the aggregate.

孔结构试验表明,大掺量矿物细粉活性粉末混凝土的孔隙率均在5%左右,孔分布情况很均匀,主要以微小的小孔为主;水泥用量为300 kg/立方公尺的大掺量矿物细粉活性粉末混凝土硬化体水化产物主要由不规则等粒子状的Ⅲ型C-S-H凝胶紧密堆积在一起,凝胶精细、致密,且与骨料融为一体。

Through the analysis of the flowing character of metal injection molding, a set ofessential equations describing the flowing process of metal ring injection molding areestablished on the bases of the general principles of hydrodynamics and calorifics.

通过对金属粉末注射成形流动过程规律的分析,从流体力学和传热学的基本原理出发,建立了一组描述圆筒形金属粉末注射成形流动过程的基本微分方程,经过假设与简化,得到一组简化的控制方程,采用有限差分法求解了这组微分方程,得到温度场。

The structures and composition of the precipitates at PHT powder surface and at PPB of hipped materials are investigated. The formation of PPB precipitation is directly related to the surface conditions of as-atomized powder. Precipitates at PPB are mainly MC carbides and ZrO〓.

预处理粉末表面及压坯原始颗粒边界的表面成分及析出相分析表明,原始颗粒边界析出的形成是与雾化粉末表面状况直接相关的,表面或界面析出相主要是MC型的碳化物和ZrO〓。

In this paper, a number of procedures were designed for studying the mechanism of forming hard agglomerates of Z〓O〓 powders, and the properties of resulting powders were investigated extensively.

研究超细粉末团聚体的形成机理、寻找控制粉末团聚状态的工艺方法是〓性能陶瓷制备理论与技术的焦点,是个十分重要的研究课题。

The results indicate that in the same reaction conditions the powders prepared by ammoniated silicon sol had smaller pellet diameter and bulk density than the direct sol-gel handling metho...

结果表明:采用氨解硅溶胶方法制得的原料粉末比直接溶胶-凝胶方法制得的粉末颗粒直径细小,团聚松散,堆积密度小。在同样合成条件下前者反应获得的碳化硅的转化率高,晶须含量高,质量好。

It is shown that uniform powder cloth with proper thickness can be produced by using appropriate rolling parameters. Thermogravimetic and pyrolysis residuum analysis indicate that the burnout process of fugitive binder used to produce the cloth is found to take place in two stages, no residuum is left when degassed properly.

结果表明,采用合适的轧制参数即可容易地获得厚度合适、均匀的粉末布;热失重分析和热解残余物分析指出用来制备粉末布的有机粘结剂的去除过程分成两个阶段,合理除气后,基本没有残余物。

Chintin with chintin film processing is not complicated, first of all the industrial processing of accumulation of crab and shrimp when chintin inmnersion hydrochloride, and a strong base to calcium and protein deposits, you can be assured of semi-finished chintin powder; and then add the acetic acid powder soluble in chintin erjia polyamlnes vlproic bisprone nitrogen and licl mixture, mixed solution evenly onto a glass plate, and lixiviating propylalcohol solution would reflect on the glass panes for the transparent on the film.

用甲壳质加工甲壳薄膜的工艺并不复杂,首先将工业加工蟹虾时积聚的甲壳质用盐酸浸泡,再用强碱使钙和蛋白质沉淀,就可得到半成品的甲壳粉末;然后将甲壳粉末溶于醋酸二甲胺、氮戊环酮和氯化锂混合液中,再将混合溶液均匀地洒在玻璃板上,并在异丙醇溶液中浸一下,玻璃板上便形成了透明的甲壳薄膜。

Through research, the relationship among cured depth and concentration of photoinitiator, exposure energy, concentration of monomer, ratio of monomer to cross linker, refractive index of liquid, volume fraction of powders, mean diameter of powders are confirmed.

通过对浆料固化性能的研究,得出了固化厚度随引发剂浓度,曝光能量,单体质量分数,单体和交联剂比例,单体溶液的折射率,粉末体积分数以及粉末粒径的变化关系,并得出相应的最佳值。

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Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

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