低QI含量煤沥青氢化产物的结构性质研究

以低QI净化沥青为原料，采用四氢萘高压加氢制取了氢化沥青，采用IR，NMR和TGA分析对氢化沥青及其原料净化沥青进行了对比研究，结果发现氢化沥青含有大量脂环结构，其独特的热解缩聚行为有利于可溶性中间相沥青的制备。     

由沥青制备多孔炭的工艺研究

采用沥青加发泡剂加炭黑制备了孔结构较好的多孔炭材料，分析和讨论了该工艺中沥青、发泡剂及炭黑的作用和影响，对多孔炭材料进行了力学性能测试和微观电镜观察分析，探讨了其可能的应用前景。     

浸渍增重率和反渗率研究

对浸溃过程中浸渍剂沥青的浸入率和反渗率进行了分析与探讨。提出了理想增重率、理论增重率与实际增重率的概念和计算方法。并比较了实际增重率与操作增重率的差别。同时分析了抽真空的绝对压力与施压的绝对压力对各项增重率和反渗率的影响。     

煤沥青氧化热聚合工艺的研究

采用空气氧化法对中温沥青进行了氧化热聚合处理，研究了氧化温度、氧化时间和空气用量对煤沥青软化点和结焦值的影响，发现煤沥青的氧化热聚合是匀速进行的，增加空气用量可以起到降低氧化温度和缩短氧化时间的效果。     

Influence of granular carbons on pitch properties

This paper deals with the study of the variation of properties of four pitches (a commercial impregnating coal tar pitch, an air-blown and two thermally treated pitches) when mixed with four granular carbons (anthracite, graphite, green petroleum coke and foundry coke). As a first step, optical microscopy was used to determine the distribution of the pitch among the granular carbons. The anthracite seems to attract the primary quinoline insolubles present in the commercial and thermally treated pitches. This allows the mesophase spheres to coalesce at unusually low temperatures during the mixing process. In general, the toluene insoluble content of the pitch showed a significant increase after mixing with the granular carbons. This is an indication of the interactions between the different granular carbons and some compounds present in the pitches. Analytical techniques like size exclusion chromatography and differential scanning calorimetric analysis were used in order to obtain information about the characteristics of the components of the pitches that interact with the different granular carbons and their effect on pitch properties. Graphite seems to interact preferentially with the larger molecules whereas the green petroleum coke acts on a wider molecular range.     

Stabilisation of low softening point petroleum pitch fibres by HNO3

This paper deals with the stabilisation of low softening point pitch fibres obtained from petroleum pitches using HNO₃ as oxidising agent. This method presents some advantages compared with conventional methods: pitches with low softening point (SP) can be used to prepare carbon fibres (CF), the stabilisation time has been reduced, the CF yields are similar to those obtained after general methods of stabilisation, and the initial treatments to increase SP when low SP pitches are used to prepare CF, are avoided. The parent pitches were characterised by different techniques such as diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), elemental analysis and solvent extraction with toluene and quinoline. The interaction between HNO₃ and the pitch fibres, as well as the changes occurring during the heat treatment, have been followed by DRIFTS.     

煤焦油沥青的深度利用及发展前景

煤焦油沥青的深加工对提高煤焦油沥青利用价值和经济性至关重要。本文主要概述了煤焦油沥青深加工利用的主要技术,重点概述了球形活性炭、中间相沥青、通用级沥青基碳纤维以及针状焦等。对各种产品的关键技术进行了分析,介绍了当前在各项关键技术方面的研究进展。煤焦油沥青基球形活性炭、通用级沥青基碳纤维以及针状焦已经得到了比较广泛的应用,当前研究的难点是提高各项产品的品质,缩短加工周期。另外,中间相沥青的发现与应用拓展了传统碳材料的应用领域,并大幅提高了炭材料的相关性能。     

Processing of mesocarbon microbeads to high-performance materials: Part I. Studies towards the sintering mechanism

Owing to their exceptional properties, carbon-carbon composites have a variety of important applications. One attractive approach for the efficient and low-cost production of such materials is to utilize the unique sintering ability of mesocarbon microbeads (MCMB). However, the mechanism of MCMB sintering is not fully understood. In this work, detailed studies are made towards this goal, using dilatometric, thermogravimetric, and mass spectrometry techniques along with microstructural analysis. It is shown by independent measurements that significant changes in pycnometric density, mass loss, and shrinkage all occur in the same temperature range (800-1200 K). Based on the obtained results, a new explanation is suggested for the high sinterability of the investigated material, which includes two main stages: (i) neck formation between particles by a viscous phase non-densifying sintering mechanism (<800 K); (ii) rapid sample shrinkage due to crystallographic transformations leading to changes of theoretical particle density in the temperature range 800-1200 K.     

一种风力发电软并网控制器的研究与设计

介绍定桨距风力发电机软并网技术的核心部件——软并网控制器的设计,给出系统结构和各部分的硬件电路设计和软件流程。采用基于ARM内核的单片机STM32103作为主控芯片发送触发脉冲,脉冲变压器作为驱动电路,软并网控制器与PLC配合完成软并网和软脱网功能,具有结构简单、功能可靠和适用性强的特点。     

液相浸渍法制备C／C复合材料

介绍了液相渍炭纤维坯体的两种方法。探讨了沥青浸渍和树脂浸渍的浸渍过程和增密效果,比较了两种浸渍方法的相似之处和不同之处。