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• 2018-12-01 15:49发布了问答

  碳纳米管 属于什么材料

  　

  343人看过

• 2018-11-12 13:31发布了问答

  量子点中悬空键是什么样子的键

  　

  434人看过

• 2017-10-23 14:52发布了问答

  量子点荧光检测金属离子机理怎么分析

  　

  357人看过

• 2017-06-25 12:13发布了问答

  什么是天然橡胶纳米复合材料

  　

  380人看过

• 2017-05-16 09:32发布了问答

  石墨烯 怎么证明 化学接枝 物理混合

  　

  271人看过

• 2017-02-23 06:19发布了问答

  一般制备的纳米材料和纳米晶体有什么区别

  　

  457人看过

• 2016-12-26 15:16发布了问答

  香港城市大学材料工程及纳米技术怎么样

  　

  296人看过

• 2015-05-03 03:48发布了问答

  预焙阳极生坯冷却后温度偏高在焙烧装炉后会产生那些影响？

  目前成型车间产量有限，输送过来的生坯温度偏高，有60度左右吧，焙烧车间为保证曲线的正常运行，急于装炉，然后用温度大约200度左右的填充料做为覆盖或层间。不知会对产品产生哪些影响？

  440人看过

• 2015-04-19 21:10发布了问答

  小叶黄杨树生虫打什么药

  　

  354人看过

• 2014-10-02 05:16发布了问答

  若某分散系中分散质直径大小为纳米级，该分散系是胶体。对吗？

  　

  392人看过

• 2014-04-20 02:40发布了问答

  大家知道 贬石带着有什么好处啊

  　

  312人看过

• 2013-08-31 11:44发布了问答

  红色警戒3为什么我建不了矿石精炼厂？

  我造了一辆MCV在矿脉旁边展开了，为什么我建不了矿石精炼厂？我再建了个基地车过去展开了。还是建不了。

  786人看过

• 2010-07-26 00:48发布了问答

  什么是纳米陶瓷材料

  什么是纳米陶瓷材料

  452人看过

• 2009-04-11 11:36发布了问答

  很急！在线等答案！！关于纳米材料的制备！

  我的本科论文是关于纳米ZnO的制备，目前所用的几种方法，如水热法，直接沉淀法等，那么用这些方法是怎么样保证得出的产品是纳米级的呢？？？很急！在线等答案！

  393人看过

• 2006-10-18 01:46发布了问答

  翻译纳米材料摘要（2）

  Moreover， the particle size of incorporated ZnO calculated from the effective mass model was close to the results obtained from HRTEM. The synthesis method developed in course of this work can be used for the fabrication of different polym... Moreover， the particle size of incorporated ZnO calculated from the effective mass model was close to the results obtained from HRTEM. The synthesis method developed in course of this work can be used for the fabrication of different polymer-inorganic transparent nanocomposites with other functionalities. In the second part of the thesis， we studied a method for the fabrication of micro-porous surface layer – made of copper nanoparticles – on the surface of copper plates (suitable for heat exchangers). The micro-porous surfaces were formed from dendritic network of copper nanoparticles obtained by electrodeposition from solution using dynamic bubble formation and removal as template. The surface layer engineered and its structures were optimized in order to enhance the boiling heat transfer coefficient. To further optimize the dendritic structure， additional annealing step was introduce and its effect on the surface layer structure and properties were investigated. The properties of the deposited surface structures were investigated and its effect on the enhancement of the heart transfer coefficient has been studied. The fabricated enhanced surface has shown an excellent performance in nucleate boiling. Pool boiling tests were performed on refrigerant fluids (R134a) to evaluate the boiling performance of the electrodeposited nanostructured micro-porous structures. At heat flux of 1 W/cm2， the heat transfer coefficient is enhanced over 15 times compared to a plain reference surface. A model has been presented to explain the enhancement based on the structure characteristics. 展开

  360人看过

• 2005-11-13 10:45发布了问答

  什麽叫量子点

  用通俗点的话说

  444人看过