查询词典 coprecipitation

In this thesis, three major achievements were made in theoretical study: conditions and rules for preparing nano-powders by chemical precipitation are analyzed from the point of view of thermodynamics and kinetics, the principle, standards and experimental method for the aqueous dispersion of nano-scaled metal oxide powders were proposed and verified, mathematical model of nano-filming addition of dopants by chemical coprecipitation was established. In experimental research, nm-ZnO, nm-Bi〓O〓, nm-Co〓O〓 and nm-MnO powder with spherical shape, narrow particle size distribution and small particle size were prepared successfully, highly stable and dispersive aqueous suspensoid of nm-ZnO, nm-TiO〓, nm-Co〓O〓 and nm-MnO powder were prepared successfully and surface modification on these nano-powders was also achieved, 0-3 nanocomposite ZnO varistors with nm-ZnO, nm-TiO〓and nm-MnO respectively were prepared successfully by conventional mechanical attrition, and exhibited much better electrical properties than those of conventional varistors.

综上所述，本文在理论研究方面取得了三项成果：（1）从热力学和动力学角度推导并分析了液相化学沉淀法制备纳米粉体的反应条件和规律，（2）提出了纳米氧化物的水分散体系的设计原理、规范和通用实验步骤，（3）提出了共沉淀的数学模型和计算方法；在实验方面所取得的成果有：（1）成功制备了粒度小、分布窄、形貌对称的纳米氧化锌、纳米氧化铋、纳米氧化钴和纳米氧化亚锰，（2）成功地制备了纳米氧化锌、纳米二氧化钛、纳米氧化钴和纳米氧化锰的高稳定分散悬浮液并实现了干粉体的表面改性，（3）成功地进行了纳米氧化锌、纳米二氧化钛和纳米氧化锰对压敏电阻的0—3复合掺杂实验，试样性能远优于常规压敏电阻，为实现压敏电阻的高能高压化提供了新的方法和思路。

The authors are aware of work investigating the coprecipitation of both Al and Mn with Fe to form an aluminic ferrihydrite and a manganic ferrihydrite respectively.

作者们意识到调查研究 Fe与 Al和 Mn 的共同沉淀分别地形成含铝氢氧化铁和含锰氢氧化铁。

The catalyst prepared by coprecipitation-impregnation has good catalytic performance of maleic anhydride hydrogenation to γ-butyrolactone.

共沉淀-浸渍法制备的20％CuO-20％SnO〓/Al〓O〓催化剂具有较好的顺酐加氢制γ-丁内酯活性，在280℃，顺酐转化率为94.4％，γ-丁内酯选择性为100.0％。

SEPARATION OF TRACE AMOUNTS OF THORIUM BY COPRECIPITATION WITH CERIC IODATE

用碘酸高铈共沉淀法分离痕量钍

A chemical coagulatory coprecipitation method was used in the treatment of blast-furnace gas washing water.

用化学混凝共沉淀的方法处理高炉煤气洗涤水，实验确定了最佳的药剂为聚合氯化铝钙，工艺的最佳操作条件是聚合氯化铝钙加入量为33mg/L，PAM加入量为0。

A chemical coagulatory coprecipitation method was used in the treatment of blast-furnace gas washing water.

用化学混凝共沉淀的方法处理高炉煤气洗涤水，实验确定了最佳的药剂为聚合氯化铝钙，工艺的最佳操作条件是聚合氯化铝钙加入量为33mg/L，PAM加入量为0.5mg/L，搅拌时间为60s，搅拌强度为90r/min。

The activity of catalyst prepared by coprecipitation is mainly decided by its chemical components, and it is influenced by the preparation conditions at the same time.

另外还进行了反应机理的探讨，找出了催化剂的反应性能与结构的关系，为改进催化剂提供了理论依据。

The coprecipitation mechanism has also been studied.The results have shown that it belongs to adsorption copreci...

同时对共沉淀机理进行了初步的研究探讨，结果表明其属于吸附共沉淀类型。

The result indicated that the process of coprecipitation foam separation could be regarded as a first order reaction.

结果表明该泡沫分离过程可等效为一级反应，结合停留时间分布测定对该过程的数学模型进行了分析讨论。

In this paper, the optimal parameters of co-precipitation are developed aimed at al cations coprecipitation.

本文的主要创新之处在于：以阳离子共沉淀为目标，提出了合理的沉淀工艺参数。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。