An abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds. 一种丰富的非金属四价元素,有三种同素异形体:无定形碳、石墨、金刚石。
Two kinds of carbon materials, i. e. amorphous carbon and natural graphite, were included. 炭材料包括无定形炭和改性天然石墨两种。
The nanometer amorphous mixture of α-quartz and graphite was prepared by high-energy MBM. The lowest pressure and temperature for synthesizing coesite are 3.7 GPa, 970 K. 利用高能机械球磨制备了α-石英和石墨纳米非晶混合粉末,其高温高压合成柯石英的最低条件是970K和3.7GPa。
Amorphous carbon nitride a-CN. x. thin films are prepared by reactive ion beam sputtering deposition method using N 2 as working gas and a graphite target. 采用离子束溅射反应沉积技术,以高纯N2为工作气体,利用在不同气压下产生的离子束轰击石墨靶,在石英基片上溅射出的碳原子与氮离子反应,沉积出a-CNx薄膜。
The latest research and development on anode materials for Li-ion batteries were reviewed, which included amorphous carbons, novel anode materials and modification of natural graphite. 对近期锂离子电池负极材料方面的研究和开发工作进行了综述。主要包括无定形碳材料、新型负极材料和天然石墨的改性。
X-ray diffraction and SEM analysis show that the graphite becomes amorphous and the metal Sn is embedded in the ductile graphite matrix after intensive ball milling. 结果表明:经过高能球磨后,石墨变为无定形结构,金属锡与柔软的石墨基体形成复合物材料。
Diamond film formed during the first stage possesses an amorphous morphology richedr in graphite, which is determined to be a transition lager of non diamond structure by XRD spectrum. 观察到成核初期的金刚石不具有明显晶形,含有较高的石墨相。XRD谱表明:成核初期衬底表面形成非金刚石结构的过渡层。
Finally the non-diamond type carbon impurities was found between the diamond grains in the diamond film, which are amorphous carbon and/ or microcrystalline graphite. 此外,在金刚石薄膜中还观察到存在于金刚石颗粒间的非金刚石型碳(C),即无定形碳及微晶石墨。
The XPS and Raman results show that the C element is in presence of amorphous graphite. CrCN则没有出现结晶,通过XPS和Raman分析,发现薄膜中C含量很高,以无定形石墨相存在。
Preparation of Bulk Amorphous Alloy by Electric Arc Furnace with Graphite Crucible 在石墨坩埚电弧炉中制备大块非晶合金
Large quantities of high-purity β-SiC nanowires without and with amorphous SiO2 wrapping layers have been synthesized at relatively low temperature and with no confined spaces via a new simple method-the vapor-chemical-reaction approach, in a homemade graphite reaction cell. 于自制石墨反应室中,用简单的气相化学反应法,在无空间限制和较低的温度下,合成出大量的高质量不带和带有非晶SiO2包覆层的β-SiC纳米线。
In this paper, boron-doped diamond was synthesized at high pressure and high temperature by adding amorphous boron powder into the system of graphite and metal catalyst powder using cubic multi-anvil high pressure apparatus. 本文通过将一定比例的无定形硼粉均匀加入到粉末石墨&触媒体系中,在六面顶压机上利用高温高压方法合成了掺硼金刚石。
Application of Amorphous Graphite Sand to Iron Castings 无定形石墨砂在铸铁中的应用
Super-hard amorphous carbon films were deposited on such substrates as single-crystalline silicon and K9 glass by pulse laser ablating graphite target. 本文研究用脉冲激光烧蚀石墨靶方法在单晶硅、K9玻璃等衬底上生长超硬非晶碳膜。
The result from X-ray diffraction shows that the carbon in the stripping foil occurs as amorphous graphite. 碳剥离膜的X衍射谱测试结果表明,膜上的碳以非晶体石墨形式存在。
The result of MD simulation means that: ( 1) the microstructure in the amorphous carbon has no obvious change, the slippage which is parallel to the fiber axes in the graphite slices of the PyC interphase was found; 分子动力学模拟结果表明,(1)界面相内部无定形碳部分微结构无明显变化,石墨片层部分沿纤维轴向滑移;
The results indicate that the structure of C N films is amorphous with diamond and graphite phases. 结果表明:C-N薄膜的结构为非晶态,同时含有金刚石和石墨相;
The apparent rate of transition reaction from amorphous carbon to graphite is a constant and the reaction order is quasi-zero. 由无定形碳向石墨转变的反应为准零级,其表观速度为常数。
According to analysis, the most of Sb 2O 3 are isometric while a small amount is oblique crystal. The other minerals in it are amorphous carbon, graphite, hematite and quartz. 其物相组成以等轴晶系Sb2O3为主,另有少量斜方晶系Sb2O3,其它则为无定形碳、石墨、赤铁矿(Fe2O3)、石英(SiO2)等。
Thereinto, the magnetic particles can not only improve the mechanical stresses of carbon microspheres, but also play a role of catalyst for the phase transformation from amorphous carbon to graphite, and the transition temperature was reduced dramatically. 磁性粒子的存在不但增强了碳微球的机械强度,而且也对无定形碳向石墨碳的转化起到催化作用,大大降低了石墨化温度。
XRD analysis shows that nano-crystal silicon ( partly amorphous) is obtained by high-energy ball milling of raw silicon powders. Two-step ball milling method used in this thesis makes the nano-structured Si and graphite contact intimately and also prevents the formation of electrochemical inactive SiC. XRD分析表明,高能球磨可以得到纳米晶并有部分无定形化的硅,而二步球磨可以使硅与石墨紧密接触,同时又可以防止生成电化学惰性的炭化硅(SiC)。
XRD patterns and Raman spectra indicated that the carbon spheres were amorphous graphite phase. 拉曼光谱和X射线衍射(XRD)表明这些碳微球是无定形碳相。
Under the instant high temperature caused by the high speed sliding, the metastable amorphous carbon will break the energy barrier and transform into stable graphite. It lubricates the coating and decreases both friction coefficient and wear rate. 高速滑动中,DLC涂层在摩擦过程中产生的瞬时高温下,亚稳态的无定型碳打破能量壁垒转化为稳定的石墨,对涂层起到了润滑的作用,有效降低了摩擦系数和磨损量。