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Selecting the suitable fulgurite medium KCl and annealed at 600~800℃,the precursor can grow into SnO2 nanorods via self assembly.

选择合适的熔盐介质 KCl,在600~800℃对前驱物进行退火处理,前驱物纳米颗粒可自组装生长形成SnO2 纳米棒、纳米线。

In addition, after comparing the time difference between the precursor and the main PKKPbc phase at different outer core conversion point positions, we find the seismic evidence for the tangent cylinder structure in the outer core.

4通过对PKKPbc波形及其前驱波的分析,得到了外核顶部轻元素组成的刚性薄层的地震学性质:我们还通过比较不同位置的前驱波到时的差异,提出了外核可能存在tangent cylinder结构的地震学证据。

This invention discloses a method for preparing monodisperse oil-soluble surface-modified ferric oxide nanoparticles. The method comprises: mixing ethanol solution of soluble ferric salt with ethanol solution of fatty acid, adding alkali, stirring to obtain precursor of ferric oxyhydrogen fatty acid salt precipitate, and cracking at 210-280 deg.

一种制备单分散、油溶性表面修饰氧化铁纳米微粒的方法,将可溶性铁盐的乙醇溶液与脂肪酸的乙醇溶液混合,加入碱搅拌得前驱体三价铁氢氧脂肪酸盐沉淀;单元前驱体三价铁氢氧脂肪酸盐在无溶剂下直接热解得目标产品。

The paper compares the reaction of disinfectants of Cl,ClO_2 and ClO_2/Cl to 9 kinds THMs prodrome such as phenol,including volume from disinfectants on their prodrome contents,reaction pH values,reaction time,and reaction temperature.

主要考察了氯、二氧化氯和二氧化氯/氯(二氧化氯占混合溶液的质量分数为50%,90%)这3种消毒剂与苯酚等9种THMS前驱物的反应,并对这3种消毒剂在前驱物含量、反应pH值、反应时间和反应温度等条件下生成的氯仿量进行了比较。

The effect degree order is: first, organic template; second, mineralization ion precursor; third, surface treatment; fourth, lay amount of thin film. In the process of biomimetic synthesis, first of all, the stone surface was pretreated with ethanol and functionalized with organic template solution, and then filmed repetitiously by using filtered CaC_2O_4 supersaturation solution as precursor.

仿生合成的影响因素的影响程度为:有机模板的影响>成矿离子前驱液的影响>石材表面预清洁方式的影响>保护膜层数的影响,较佳的制备条件是:石材表面用乙醇预清洁,较浓浓度的有机模板溶液使之表面功能化,过滤的草酸钙过饱和溶液作前驱液,多层制膜。

The hydrolysis rate constant of TEOS in mixed systems was larger compared with TEOS in single precursor systems.

与单前驱体水解一致的是,在双前驱体系中TEOS和DDS自身的反应级数仍保持一级,但是氨和水的反应级数都有不同程度的增大。

Another important result was that the reactive orders of both ammonia and water were increased to different extent for TEOS and DDS in mixed systems.

同时, DDS在双前驱体中比单前驱体中的水解速率常数有很大程度的减少。

The use of cheap raw materials, simple processes and simple equipment, while in the legal system for a Zirconia-based ceramic materials of valuable hardware, through the precursor decomposition by zirconium oxide ceramic micro base, and on this basis, the use of dry-pressed shaped and without pressure sinter prepared for the implications for sinter explore sintering processes.

本文使用价格低廉的原料、简单的工艺和简易的设备,固相法制备出氧化锆基陶瓷粉体的前驱体,通过前驱体分解得到氧化锆基陶瓷粉体,并在此基础上,利用干压成型和无压烧结对所制备的粉体进行烧结,探讨烧结工艺。

Highly ordered mesoporous Zr-Ce-SBA-15 silica with hexagonal-platelet morphology was synthesized through a hydrothermal route by using pluronic P123 as a template, tetraethyl orthosilicate as a silica source, zirconyl chloride and cerous nitrate as a precursor. The main strategy of this method was to utilize the acidity self-generated from the hydrolysis of inorganic salts in the aqueous solutions, where no addition of mineral acids was necessary.

以P123为模板剂,正硅酸乙酯为硅源,氯化氧锆和硝酸亚铈为无机前驱盐,在不外加无机酸的条件下,利用无机前驱盐自身水解产生的弱酸性环境,通过水热合成路线一步合成了具有大的径轴比、短孔道、六方板状形貌的Zr-Ce-SBA-15介孔材料。

It includes the following steps: extract trivalent iron ion and divalent iron ion in water phase through organic extractant, get predecessor of; absterge it with secondary distilled water for2-3 times and get pure load metal predecessor of organic phase; mix organic phase of Mg2 and Fe3 with mol rate of 1:2 and introduce them into autoclave, add distilled water according to the rate of 3:1 or 4:1 of organic phase and water phase and airproof it, and then mix it fiercely, stripping with hydrothermal method at temperature between 200 degree C and 300 degree C and make them react for 2.5 hours; cool it to the room temperature under natural condition, separate liquid and centrifugalize it, absterge it with absolute alcohol for 2-3 times and dry it at temperature of 50 degree C for 30-180 minutes, then get product of magnesium ferrite.

包括如下步骤:通过有机萃取剂来萃取水相中的三价铁离子和二价镁离子,制得有机相前驱物;用二次蒸馏水洗涤2-3次,获得纯净的负载金属有机相前驱物;按照Mg 2 和Fe 3 摩尔比1∶2将有机相混合均匀后引入高压釜中,按照有机相与水相的比例为3∶1或4∶1加入蒸馏水,密封后,对溶液进行强力搅拌,水热反萃的温度在200-300℃之间反应2.5小时;自然冷却至室温,分液,离心分离,用无水乙醇洗涤2-3次,在50℃下干燥30-180分钟,得铁酸镁产品。

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