TANG Huiqing
,
GUO Zhancheng
,
ZHAO Zhilong
钢铁研究学报(英文版)
A large deposit of high phosphorus iron ore in China contains an average of 1.2% phosphorus and 50% iron and it has not been utilized. In current work, a novel process to remove phosphorus of the ore has been proposed. The novel process has been demonstrated theoretically and experimentally. The theoretical work (numerical simulation) was carried out with HSC chemistry package and a mathematical model developed using the coexistence theory of slag structure. Gas-based reduction and melt separation experiments were then designed and conducted. Simulation results shows that that all iron compounds in the ore could be reduced to metallic iron using CO/ H2 under temperature above 1000K and the yield of iron is more than 90% under either atmosphere; P can not be reduced and exists as Ca3(PO4)2; in the melt separation process, iron metallization ratio, melting temperature and CaO-adding ratio affect the phosphorus partition between slag and molten metal and CaO-adding ratio is the most distinguished parameter. Results of gas-based reduction agreed well with the simulation except for iron metallization ratio being less than predicted. This difference is mainly attributed to kinetic condition. Results of melt separation experiment show most P is left in the slag sample and some P in the metal sample exists as slag inclusion..
关键词:
High phosphorus iron ore;Numerical simulation;Gas-based reduction;Melt separation
中国腐蚀与防护学报
N。1Atmospheric Corrosivlty for Steels………………………………………………… .LIANG Caideng HO[I i。-tat（6）Caustic Stress Corrosion Cr。king of Alloy 800 Part 2.The Effect of Thiosul执e……………………………………… KONG De-sheng YANG Wu ZHAO Guo-zheng HUANG De.ltL。ZHANG Yu。。he CHEN She。g-bac（13）SERS slid E16CttOCh6iniC81 Stlldy Of Illhibit1Oli M6ch＆tllsth Of ThlollY68 Oil ITOll ID H....
关键词:
程开甲
,
程漱玉
稀有金属材料与工程
应用Cheng-Born能带对称破缺理论和TFDC(Thomas-Fermi-Dirac-Cheng)电子理论研究了薄膜层内电子的特性.对金属铂上的TiO2膜层来说,TFDC理论指出电子(或空穴)将由金属与膜的间界面一侧迁移到另一侧.根据Cheng-Born对称破缺理论,当能带中只有很少的电子时,则只有极少的角区中存在电子,动量空间即产生对称破缺,从而导致超导电性,并由热力学估算出薄膜超导体的转变温度.结果显示薄膜超导体的转变温度至少比块材超导体的转变温度高一个量级.作者还设计了一个研究薄膜超导电性的实验.
关键词:
超导电性
,
薄膜
,
对称破缺
,
TFDC
李翔宇
,
赵霄龙
,
郭向勇
,
曹力强
材料导报
在Cheng-Vachon模型的基础上提出了一种针对由连续相和分散相组成的两相复合材料的新导热系数模型.通过引入一个新的参数,即分散相的修正体积含量来改进Cheng-Vachon模型不适用于分散相体积含量较大的缺点.使用新的导热系数模型预测泡沫混凝土的导热系数,与实验结果的对比表明,新的模型可以准确预测泡沫混凝土的导热系数.
关键词:
泡沫混凝土
,
复合材料
,
导热系数
,
无机材料
王姗姗
,
祝要民
,
任凤章
,
赵士阳
,
田保红
材料科学与工程学报
直流电沉积法在Fe基体上制备Ni膜和在Cu基体上制备Ag膜,利用悬臂梁法在线测量了膜中的平均应力,并计算了膜内分布应力,且对膜内平均应力的实验结果与Thomas-Feimi-Dirac-Cheng(TFDC)电子模型理论估算结果进行了对比.结果表明,Fe基体上Ni膜的平均应力和分布应力均为拉应力,而Cu基体上Ag膜的平均应力和分布应力均为压应力.两种膜的内应力均由界面应力引起.对于相同的基体和镀膜,膜内平均内应力的理论估算值与实验值较接近.
关键词:
薄膜
,
内应力
,
悬臂梁法
,
电子理论
任凤章
,
曹轲
,
郑茂盛
,
马战红
,
苏娟华
,
田保红
稀有金属材料与工程
采用电沉积法在Ni基体上制备Cu膜.悬臂梁法在线测量沉积Cu膜后的Ni基片挠度,由测得的挠度值计算出Cu膜内的平均内应力和分布内应力.结果表明,Cu膜内的平均内应力和分布内应力均随膜厚的增加而急剧减小.膜内的界面应力很大,而生长应力很小.基于改进的Thomas-Feimi-Dirac-Cheng(TFDC)电子理论,对由于界面电子密度调整而引起的Cu膜内平均内应力作出了初步估算.结果表明,理论估算结果与实验结果较接近.这说明理论计算模型具有较高的准确性.
关键词:
薄膜
,
内应力
,
悬臂梁法
,
电子密度
,
TFDC电子理论
温伟
,
王彪
,
王华平
材料导报
采用原位聚合法制备了碳纳米管/聚丙烯腈(CNT/PAN)复合材料,用MDSC的测试方法研究了复合材料的热性能,并由此推导了复合材料的热导率.应用Cheng-Vachon、Nielsen-Lewis和Okamoto-Ishida 3种导热理论模型对CNT/PAN复合材料的热导率进行估算.对比实验测试与导热理论模型的计算结果,考虑到碳纳米管在聚合物基体中的分散和取向情况,得出Nielsen-Lewis理论在低填充含量及室温条件下可以较准确地估算无规分散的CNT/PAN复合材料体系的热导率.
关键词:
碳纳米管/聚丙烯腈复合材料
,
导热理论模型
,
热导率
,
比热容
