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热处理温度对ZrO_(2)纤维复合ZrO_(2)-C材料性能的影响

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硅酸盐通报 2021年第10期40卷 3219-3225,3240页

作者：陈海军徐恩霞李淼高金星葛铁柱郑州大学材料科学与工程学院河南省高温功能材料重点实验室郑州450052

浸入式水口是钢铁连铸工序中关键的功能耐火材料,其中以渣线部位的工作环境最为恶劣。目前,最适合的渣线材料是ZrO_(2)-C材料。为了提高浸入式水口的性能,本文以氧化锆与鳞片石墨为主要原料,添加增强材料氧化锆纤维及金属硅粉等,以酚醛... 详细信息

浸入式水口是钢铁连铸工序中关键的功能耐火材料,其中以渣线部位的工作环境最为恶劣。目前,最适合的渣线材料是ZrO_(2)-C材料。为了提高浸入式水口的性能,本文以氧化锆与鳞片石墨为主要原料,添加增强材料氧化锆纤维及金属硅粉等,以酚醛树脂为结合剂制备ZrO_(2)-C复合材料。比较了1000℃、1200℃和1500℃三种热处理温度对ZrO_(2)-C材料的性能及显微结构的影响,结果表明,在热处理温度高于1200℃时,ZrO_(2)-C材料中的硅粉与石墨发生反应生成碳化硅,大量晶须状碳化硅与ZrO_(2)纤维交错在一起形成网络结构,提高了材料的力学性能和抗热震性。

关键词：耐火材料 ZrO_(2)-C材料热处理温度抗热震性能碳化硅晶须浸入式水口

烧成工艺对堇青石-莫来石窑具材料性能的影响

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中国陶瓷 2017年第1期53卷 86-90页

作者：陈宁李素平丁颖颖马成良葛铁柱郑州大学高温功能材料河南省重点实验室郑州450052

以堇青石、莫来石、高岭土和氧化铝微粉为原料制备堇青石-莫来石窑具材料,研究了烧成温度、保温时间对堇青石-莫来石窑具材料的常温性能、高温抗折强度和抗热震性的影响。并通过XRD分析了试样烧成后的物相变化,通过SEM观察了试样的显微... 详细信息

以堇青石、莫来石、高岭土和氧化铝微粉为原料制备堇青石-莫来石窑具材料,研究了烧成温度、保温时间对堇青石-莫来石窑具材料的常温性能、高温抗折强度和抗热震性的影响。并通过XRD分析了试样烧成后的物相变化,通过SEM观察了试样的显微结构。结果表明:随烧成温度从1340℃提高到1400℃,试样的线膨胀率增加,显气孔率增加,常温抗折、常温耐压强度和高温抗折强度增大,但1370℃烧成后的试样的抗热震性最好;对1370℃烧成的试样,随保温时间从3 h延长到5 h,试样的常温性能、高温抗折强度及抗热震性都有所降低。综合分析,在1370℃下保温3 h烧成的试样性能较为优良。

关键词：堇青石莫来石窑具烧成工艺抗热震性

热处理温度对矾土基莫来石材料结构及晶体生长的影响

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耐火材料 2023年第4期57卷 314-319页

作者：麦海香赵飞安建成王亚利连伟康胡杨葛铁柱刘新红郑州大学、河南省高温功能材料重点实验室河南郑州450052 北京金隅通达耐火技术有限公司北京100085 阳泉金隅通达高温材料有限公司山西阳泉045000

为了优化矾土基莫来石材料的性能,以Al_(2)O_(3)含量约为70%(w)的Ⅱ等高铝矾土为原料,采用湿法均化、高温热处理工艺制备矾土基莫来石试样,研究了热处理温度(空气气氛下分别在1350~1650℃保温4 h)对试样物相组成与显微结构的影响,并探... 详细信息

为了优化矾土基莫来石材料的性能,以Al_(2)O_(3)含量约为70%(w)的Ⅱ等高铝矾土为原料,采用湿法均化、高温热处理工艺制备矾土基莫来石试样,研究了热处理温度(空气气氛下分别在1350~1650℃保温4 h)对试样物相组成与显微结构的影响,并探讨了柱状莫来石晶体的生长机制。结果表明,莫来石符合固-液环境下生长发育的特征:1)1350~1500℃时,大量Al_(2)O_(3)溶解至SiO_(2)非晶质中加快了二次莫来石化反应进程,该阶段液相的过饱和度较高,莫来石晶粒伴随有台阶生长的特征;2)在重结晶烧结阶段(1500~1650℃),结晶相的增加消耗了液相中的Al_(2)O_(3),液相过饱和度降低,莫来石晶体表现出螺旋位错为主的生长特征;3)随热处理温度的升高(1350~1650℃),试样中的液相黏度降低,从而减少了晶体各向异性生长的阻力,使莫来石晶粒逐渐发育成长柱状并形成连续交叉的网络结构。

关键词：高铝矾土矾土基莫来石材料晶体结构晶体生长

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居民小区的供配电设计研究

城市建筑 2014年第18期11卷 187-187页

作者：戈铁柱新疆钢铁设计院有限责任公司 830022

作为居民小区建筑设计的基本内容，供配电设计对于保证居民小区用电的安全性和可靠性具有重要作用。

关键词：居民小区供配电设计分析

Unregulated emissions from diesel engine with particulate filter using Fe-based fuel borne catalyst

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Journal of Environmental Sciences 2014年第10期26卷 2027-2033页

作者： Hong Zhao Yunshan ge tiezhu Zhang Jipeng Zhang Jianwei Tan Hongxin Zhang College of Mechanical & Electronic Engineering Qingdao University National Lab of Auto Performance & Emission Test Beijing Institute of Technology

The alteration and formation of toxic compounds and potential changes in the toxicity of emissions when using after-treatment technologies have gained wide attention. Volatile organic compound（VOC）, carbonyl compound and particle-phase polycyclic aromatic hydrocarbon（PAH） emissions were tested at European Steady State Cycle（ESC） to study unregulated emissions from a diesel engine with a fuel-borne catalyst and diesel particulate filter（FBC–DPF）. An Fe-based fuel-borne catalyst was used for this study. According to the results, brake specific emissions of total VOCs without and with DPF were 4.7 and4.9 mg/kWh, respectively, showing a 4.3% increase. Benzene and n-undecane emissions increased and toluene emission decreased, while other individual VOC emissions basically had no change. When retrofitted with the FBC–DPF, total carbonyl compound emission decreased 15.7%, from 25.8 to 21.8 mg/kWh. The two highest carbonyls, formaldehyde and acetaldehyde, were reduced from 20.0 and 3.7 to 16.5 and 3.3 mg/kWh respectively. The specific reactivity（SR） with DPF was reduced from 6.68 to 6.64 mg/kWh. Total particle-phase PAH emissions decreased 66.4% with DPF compared to that without DPF. However, the Benzo[a]pyrene equivalent（BaPeq） with DPF had increased from 0.016 to 0.030 mg/*** and Pyrene had the greatest decrease, 91.1% and 88.4% respectively. The increase of two- and three-ring PAHs with DPF indicates that the fuel-borne catalyst caused some gas-phase PAHs to adsorb on particles. The results of this study expand the knowledge of the effects of using a particulate filter and a Fe-based fuel-borne catalyst on diesel engine unregulated emissions.

关键词： Fuel-borne catalyst DPF VOCs Carbonyl compounds Particle-phase PAHs

基于残差编解码网络的矿用摄像仪视频图像畸变校正方法

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自动化与仪器仪表 2023年第10期 241-245页

作者：戈铁柱赵越陈贺华泽勋籍慧琴杨豪放煤炭资源高效开采与洁净利用国家重点实验室北京100013 煤科(北京)检测技术有限公司北京102608 煤炭科学技术研究院有限公司北京100013

为了获得无像素点密集、边缘细节丢失以及扭曲的高质量矿用摄像仪视频图像,设计了基于残差编解码网络的矿用摄像仪视频图像畸变校正方法。确定包括径向畸变、离心畸变和薄棱镜畸变的矿用摄像仪视频图像畸变类型,以U-Net构架为基本条件,... 详细信息

为了获得无像素点密集、边缘细节丢失以及扭曲的高质量矿用摄像仪视频图像,设计了基于残差编解码网络的矿用摄像仪视频图像畸变校正方法。确定包括径向畸变、离心畸变和薄棱镜畸变的矿用摄像仪视频图像畸变类型,以U-Net构架为基本条件,构建由上下采样、编解码以及全卷积层三大模块组成的残差编解码网络,将拍摄获取矿用摄像仪视频图像作为该网络的输入,对网络进行特征提取、非线性映射与反卷积重组操作完成残差编解码网络的训练,最终输出矿用摄像仪畸变细微环节重组视频图像,实现矿用摄像仪视频图像畸变校正;并采用随机梯度算法SGD不断优化残差编解码网络获取最佳输出结果。实验表明:该方法可实现矿用摄像仪视频图像畸变校正,获得最佳质量矿用摄像仪视频图像;且该方法校正后矿用摄像仪视频图像具备较高峰值信噪比。

关键词：残差编解码矿用摄像仪视频图像畸变校正 U-Net构架随机梯度算法

Detection of Phaeocystis globosa using sandwich hybridization integrated with nuclease protection assay(NPA-SH)

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Journal of Environmental Sciences 2008年第12期20卷 1481-1486页

作者： Zhen Yu Mi tiezhu Yu Zhigang Ocean Univ China Minist Educ Key Lab Marine Chem Theory & Technol Qingdao 266100 Peoples R China Ocean Univ China Minist Educ Key Lab Marine Environm & Ecol Qingdao 266100 Peoples R China

Phaeocystis globosa Scherffel is one of the common harmful algae species in coastal waters of the southeastern *** this study,sandwich hybridization integrated with nuclease protection assay(NPA-SH)was used to qualitatively and quantitatively detect P. *** showed that this method had good applicability and validity in analyzing the samples from laboratory cultures and from *** linear regression equation for *** was obtained,and the lowest detection number of cells was 1.8×104 c...

关键词： harmful algae blooms Phaeocystis globosa Scherffel sandwich hybridization integrated with nuclease protection assay (NPA-SH)

FEM analysis of large thermo-deflection of strips being processed in a continuous annealing furnace

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Journal of University of Science and Technology Beijing 2007年第6期14卷 580-584页

作者： Jiangbo Dai Qingdong Zhang tiezhu Chang Mechanical Engineering Scheol University of Science and Technology Beijing Beijing 100083 China

No matter what the flatness of a strip is, flat or defective, at an annealing furnace entrance, the strip can not keep its original shape and a remarkable change of its shape can be seen at the annealing furnace exit. By investigating this phenomenon at the 2030 mm continuous annealing line which belonged to Baosteel, a finite element model of thermo-mechanical buckling deformation of strips in a continuous annealing furnace were established, and the mechanism of flatness changing and the contributing factors were researched by the finite element software ANSYS.

关键词： strip annealing furnace thermo-deflection finite element simulation

Influence of Valve's Characteristic on Total Performance of Three Cylinders Internal Combustion Water Pump

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Chinese Journal of Mechanical Engineering 2009年第1期22卷 91-96页

作者： ZHANG Hongxin ZHANG tiezhu WANG Weichao College of Mechanical and Electronic Engineering Qingdao University Qingdao 266071 China Electronic Technology Institute of Vehicle Qingdao University Qingdao 266071 China

Intenal combustion pump （ICP） is a new type power device turning the thermal energy from fuel combustion into fluid pressure energy. Three cylinders prototype has just been developed. The study on the influence of valve＇s characteristic on ICP＇s total performance will found the base for its optimum design. Based on the theoretical and testing fruits of single cylinder prototype, the performance of the valves and complete appliance of the latest is simulated. When the natural frequency of valves is approximately to the round number times of the working frequency, volumetric efficiency is seriously low. The nominal rotational speed of the prototype is nearly to the speed where the volumetric efficiency is lowest, which is harmful to the normal work of ICP, so further structure optimization of valves should be carried out. The change of volumetric efficiency has great influence on the fuel consumption rate, output flow, effective thermal efficiency, effective power, and so on, but little on output pressure.

关键词： internal combustion engine water pump valve model performance