It is verified that the temperature of graphitization increases up to 300 ? in the film deposition by hipib ablated plasma , which is much higher than the other film deposition methods with graphitization temperature of less than 200 ? 当基片温度达到300时所沉积的dlc薄膜中sp ~ 3c含量开始减少,表明hipib烧蚀等离子体沉积的dlc薄膜的石墨化转变温度提高到300 (其他方法一般低于200 ) 。
The choices of parameters of transformer , secondary output voltage , maximum output current , capability , voltage regulating progression and step voltage are the crucial factors , which determines the degree of lw graphitization process 内串石墨化工艺的关键设备是变压器,变压器的参数:二次输出电压、最大输出电流、容量、调压级数、级差电压选择的合理与否,决定了内串石墨化工艺水平的高与低。
The degree of graphitization and diameter of cnts increased with elevated temperature , which showed that high temperature improved the catalysis of catalyst , and was attributed to uniform arrangement of atomic carbon , and hindered amorphous carbon 随着生长温度的升高,催化剂的活性提高,有利于碳的有序排列,生长的碳纳米管直径增大。氨气对纳米碳管的定向排列影响显著,而氢气、氮气则无影响。
In this paper , the necessary and sufficient conditions such as the diameter and some physical properties of the baked electrodes in the lengthwise graphitization furnace are highlighted and discussed in terms of single series or in multi - series packing types of the electrodes in the furnace 摘要讨论了串接石墨化炉内焙烧坯料单串装炉和多串并联装炉时,坯料的直径和一些物理性质必须满足的充要条件。
Using xrd and raman spectrum , in the temperature range of 650 - 850 , the rule of graphitization of multiwalled carbon nanotubes synthesized by catalytic decomposition of c2h2 was found : graphitization of multiwalled carbon nanotubes was improved with the increase of growth temperature 采用xrd和raman光谱,在650 - 850温度范围内,研究了催化裂解乙炔法制备的多壁纳米碳管的石墨化程度变化规律,结果表明纳米碳管的石墨化程度随生长温度的提高而提高。
This article will introduce the factors that cause the cracking of carbon - graphite products in the process of graphitization producing technology and give the preventive measures on the basis of analyzing the main reasons for the waste products with cracking during the best treated of graphitization 摘要主要介绍了在石墨化生产工艺过程中,引起炭石墨制品裂纹的各种因素,分析了在石墨化热处理过程中产生裂纹废品的主要原因,并提出了相应的预防措施。
Change of the size and the physical - chemical properties of the samples made from eca and three different low ashes raw materials with different mixing ratio have been studied during baking and graphitization , and the influence of the sort of raw material on the properties of the samples obtained has been discussed by the comparison between the physico - chemical properties of the samples 考察了无烟煤和3种少灰料以不同配比混合制成的试样在焙烧和石墨化过程中的尺寸变化及理化性能变化规律,并通过对4种以单一原料制备的试样的理化性能分析,探讨了原料种类对试样性能的影响。
The graphitized cathode block samples have been trial - produced using high quality eca ( electrically calcined anthracite ) rationed petroleum coke and pitch coke and quantitative pitch used as raw materials by the conventional carbon technics concluding moulding , baking , high pressure impregmating , after - baking and graphitization 摘要选取优质电煅无烟煤,分别配以一定比例的石油焦和沥青焦作为骨料,与煤沥青混合后按照模压成型、焙烧、高压浸渍、二次焙烧和石墨化等常规炭素制品生产工艺流程制备石墨化阴极材料试样。
Because of this , the paper first presents the graphitization process and its equipment of longitudinal wise graphitization ( lwg ) , based on the building of lwg furnace in shanxian xinxin graphitization electrode co . , ltd , henann province . it also introduces the design of automation control system with programming logic controller ( plc ) and intelligent instrument , which can automatically trace the power chart and acquire protective signal 该控制系统采用可编程逻辑控制器( plc )和智能仪表来实现送电曲线的自动跟踪、保护信号的采集,并且采用组态软件和rs485网络实现了数据记录、报表打印、报警处理等功能,提高了石墨化过程的自动化水平和产品质量。
In addition , the system can record data , print report and process the alarm event automatically by using configuration software and rs485 network , so it greatly increments the automation level in graphitization process and the quality of product second , the paper analyzes the defect of power supply in graphitization , the development of temperature measure and the furnace has big time - delay , large inertial , no exact model characteristic , so introduces a new control method in temperature grad by using fuzzy logic controller with predictive model 其次,针对目前国内石墨化送电过程的缺陷和石墨化炉具有纯滞后、大惯性、难以建立数学模型的特点,并且考虑了测温技术的发展,研究运用预估模糊控制系统实现石墨化过程温度梯度的自动控制,建议对石墨化生产控制策略进一步改进。最后,利用matlab中的simulink ,对设计的系统进行仿真,并给出了仿真结果分析。