在常温常压下 meaning in Chinese
at normal temperatures and pressures
Examples
- It is very important work for exploration to identify and evaluate oil layer , water layer , or gas layer from reservoir , and it is difficult for petroleum scientists to identify and evaluate light oil , whose color is weak , oiliness is light , volatility is strong , hydrocarbon saturation is low and fluorescence will disappear after a stretch
油气水层的识别与评价是勘探工作的重要环节，其中轻质油层的识别与评价是油水层识别与评价的难点。轻质油在常温常压下含油颜色浅、油质轻、易挥发、含油级别较低、时间略长荧光普照颜色无，容易漏失，进而漏算储量。 - 1 lanthanide hydrides ( m = la , nd , sm , dy and yb ) can be prepared easily by the direct hydrogenation of lanthanide metals catalyzed by ticl4 in tetrahydrofunan ( thf ) under normal pressure . the rate of hydrogenation decreased with increasing atomic number of lanthanides . transmission electron micrographs showed that the resulted lanthanide hydrides were in the form of nanoparticles with an average primary particle size around 20 - 40 nm
本论文首次提出一种在温和条件下催化合成纳米尺寸的镧系金属氢化物的方法，介绍在常温常压下，镧、钕、钐、镝、镱五种镧系金属在四氢呋喃( thf )溶剂中，催化剂作用下与氢气直接化合形成相应的纳米尺寸的镧系金属氢化物。 - In this paper , the preparing technological parameters , formation mechanism and structures of ( lithium ) vanadium oxides ( nanocrystalline vo2 , amorphous v2o5 , layered li1 + xv3o8 and inverse spinel linivo4 ) are systematically studied and discussed , and some properties of the products are measured as cathode materials for lithium ion batteries . the main results are as follows : ( 1 ) nanocrystalline vo2 has been successfully synthesized by a solution chemical reaction method in normal temperature and pressure . the procedure involves v2o5 reacts with koh to form k3vo3 in water and then k3vo3 is reduced with kbh4 around ph = 4 forming vo2 precipitation in aqueous
本文从实验与理论分析相结合的角度对(锂)钒氧化物(纳米vo _ 2 、非晶态v _ 2o _ 5 、层状li _ ( 1 + x ) v _ 3o _ 8及反尖晶石型linivo _ 4 )制备过程中工艺参数、结构和形成机理等方面进行了系统深入的研究，对(锂)钒氧化物电性能进行了初步测试，取得的主要结果如下： ( 1 )成功的在常温常压下通过溶液化学反应直接制得具有纳米结构的vo _ 2粉。 - Carbon nanotubes were separately synthesized by a new pulsed laser ablation ( pla ) for in - situ growth method and cvd support method in this paper . ft - ir , uv - vis , xfs , laman , tem , xrd , bet methods were used to characterize the sol , carbon nanotube and other products in the experiment . in the pla method , the sols containing carbon nanotubes were successively obtained by using 1064nm pulsed laser to ablate the interface of fe / c , or ni / c targets and ethanol under common temperature and pressure , and then carbon nanotubes were directly acquired by evaporating the ethanol
脉冲激光轰击原位生长法是在常温常压下使用1064nm波长的脉冲激光轰击目标靶与乙醇流动相的固液界面来连续制备含有碳纳米管的溶胶，进而除去乙醇相得到碳纳米管，其中目标靶为石墨与fe 、 ni等金属催化剂混合压制成的靶片； cvd基体法是使用自制的六方介孔mcm - 41多孔材料为基体，负载fe催化剂活性组分，通过cvd法催化裂解c2h2来生长碳纳米管。 - Nano - alkali metal hydrides and lanthanide hydrides can be prepared easily by the direct hydrogenation catalyzed by ticl4 in tetrahydrofunan ( thf ) under normal pressure . lanthanide powder of nanometric size in a finely dispersed active form was generated by the thermal decomposition of organolanthanide in vacuum . 1
本文应用络合催化法，在常温常压下，在萘/ ticl4催化体系作用下合成纳米尺寸碱金属氢化物（以nah为代表） 、纳米尺寸镧系金属氢化物（以smh3为代表）和镧系金属有机化合物（以蒽镧为代表） ，并通过真空热解镧系金属有机化合物得到高分散度的纳米尺寸镧系金属粉末（以la为代表） ，主要考察如下三个方面的内容。