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KINETICS OF CARBON OXIDATION IN CARBON-BEARING REFRACTORIES

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中国有色金属学会会刊：英文版 1997年第2期7卷 39-43页

作者： Luo, Xingyuan qiao, zhiyu Yang, Tianjun Univ of Science and Technology Beijing Beijing China

ＫＩＮＥＴＩＣＳＯＦＣＡＲＢＯＮＯＸＩＤＡＴＩＯＮＩＮＣＡＲＢＯＮＢＥＡＲＩＮＧＲＥＦＲＡＣＴＯＲＩＥＳ①ＬｕｏＸｉｎｇｙｕａｎ，ＱｉａｏＺｈｉｙｕ，ＹａｎｇＴｉａｎｊｕｎＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓｉｃａｌＣ... 详细信息

ＫＩＮＥＴＩＣＳＯＦＣＡＲＢＯＮＯＸＩＤＡＴＩＯＮＩＮＣＡＲＢＯＮＢＥＡＲＩＮＧＲＥＦＲＡＣＴＯＲＩＥＳ①ＬｕｏＸｉｎｇｙｕａｎ，ＱｉａｏＺｈｉｙｕ，ＹａｎｇＴｉａｎｊｕｎＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓｉｃａｌＣｈｅｍｉｓｔｒｙ，Ｕｎｉｖｅｒｓｉ...

关键词： kinetics oxidation carbon bearing refractory

Prediction of surface and interfacial tension based on thermodynamic data and CALPHAD approach

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Rare Metals 2006年第5期25卷 512-528页

作者： qiao zhiyu CAO Zhanmin Tanaka Toshihiro Metallurgical and Ecological Engineering School University of Science and Technology Beijing Beijing 100083 China Department of Materials Science ＆ Processing Graduate School of Engineering Osaka University Osaka Japan

In this article, following a brief introduction concerning experimental measurements of surface and interfacial tensions, methods for calculating surface tension and surface segregation for binary, ternary, and multicomponent high-temperature melts based on Bulter＇s original treatment [ 1] and on available physical properties and thermodynamic data, especially excess Gibbs free energies of bulk phase and surface phase versus temperature obtained from thermodynamic databases using the calculation of phase diagram （CALPHAD） approach, with special attention to the model parameter β, have been described. In addition, the geometric models can be extended to predict surface tensions of multicom- ponent systems from those of sub-binary systems. For illustration, some calculated examples, including Pb-free soldering systems and phase-diagram evaluation of binary alloys in nanoparticle systems are given. On the basis of surface tensions of high-temperature melts, interracial tensions between liquid alloy and molten slag as well as molten slag and molten matter can be calculated using the Girifalco-Good equation [2]. Modifications are suggested in the Nishizawa＇s model [3] for estimation of interracial tension in liquid metal （A）/ceramics （MX） systems so that the calculations can be carried out based on the sublattice model and thermodynamic data, without deliberately differentiating the phase of MX at high temperature. Finally, the derivation of an approximate expression for predicting interfacial tension between the high-temperature multicomponent melts, employing Becker＇s model [4] in conjunction with Bulter＇s equation and inteffacial tension data of the simple systems is described, and some examples concerning pyrometallurgical systems are given for better understanding.

关键词： surface tension interfacial tension thermodynamics modeling prediction

LIQUIDUS OF TERNARY SYSTEM LaCl_3-MgCl_2-LiCl

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Acta Metallurgica Sinica(English Letters) 1992年第12期5卷 443-446页

作者： ZHENG Chaogui LIU Hongping qiao zhiyu YE Yupu Peking University,Beijing.China Peking Univ Beijing China

Two surfaces correponding to LaCl_3 and α-solid solution(MgCl_***) respectively: and one secondary crystallization curve with a minimum M at 63.8 wt-％ LaCl_3,2.0 wt-％ MgCl_2,34.2 wt-％ LiCl and 492℃ were fonud by means of *** combination with liquidus *** approach was also made to the alteration in LnCl_3-MgCl_2-LiCl svstem,where Lu denotes *** or Nd.

关键词： LaCl_3-MgCl_2-LiCl LaCl_3 system phase diagram

Surface Tension Calculation of Undercooled Alloys

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Rare Metals 2001年第1期20卷 58-61页

作者： zhiyu qiao, Lijun Yan, Zhanmin Cao, Guirong Liu (Department of Physical Chemistry, University of Science and Technology Beijing, Beijing 100083, China) 北京科技大学北京 100083

Based on the Butler equation and extrapolated thermodynamic data of undercooled alloys from those of liquid stable alloys, a method for surface tension calculation of undercooled alloys is proposed. The surface tensions of liquid stable and undercooled Ni-Cu (x(Ni)=0.42) and Ni-Fe (x(Ni)=0.3 and 0.7) alloys are calculated using STCBE (Surface Tension Calculation based on Butler Equation) program. The agreement between calculated values and experimental data is good enough, and the temperature dependence of the surface tension can be reasonable down to 150-200 K under the liquid temperature of the alloys.

关键词： undercooled alloy surface tension Butler equation

Solid Solution Sm_(1+x)Ba_(2-x)Cu_3O_y and Effect of Quench Temperature on SmBa_2Cu_3O_y

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Journal of Materials Science & Technology 1994年第4期10卷 269-272页

作者： Xianran XING zhiyu qiao Wenxia YUAN and Shoukun WEI (University of Science and Technology Beijing, Beijing, 100083, China)(To whom correspondence should be addressed)Xiaolong CHEN, Guanghui RAO and Jingkui LIANG (Institute of Physics, Chinese Academy o Univ of Science and Technology Beijing China

By X-ray powder diffraction technique and oxygen content analysis, a solid solution Sm1+xBa2-xCu3Oy has been determined in the range 0≤x≤0.4. When x<0.25. the Sm1+xBa2-xCu3Oy presents orthorhombic symmetry, and the orthorhombic-tetragonaJ transition ocCurs at x = 0.25. With the increase of x, TC decreases and finally breaks. The correlation between ox ygen content and phase structure at different quench temperatures related to Sm Ba2Cu3Oy has been investigated as well

关键词： x)Ba x)Cu3Oy and Effect of Quench Temperature on SmBa2Cu3Oy Cu Solid Solution Sm

An Effectual Way to Construct Phase Diagrams

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工程科学学报 1991年第2期 154-161页

作者： qiao zhiyu Liang fingkui Rao Guanghui (Department of Physical Chemistry) Institute of Physics, Academia Sinica, Beijing Academia Sinica Beijing Institute of Physics

It is described that the effectual way to construct phase diagrams is the combination of computer calculation with some critical measurements. Examples of application to the CuO-RE2O3 (RE. La, Y, Nd), Na2 B2O4, K2B2O4... 详细信息

关键词： phase diagram computer calculation DTA

Prediction of Enthalpies of Fusion for Divalent Rare Earth Halides Based on Modeling by Artificial Neural Networks and Pattern Recognition

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International Journal of Minerals,Metallurgy and Materials 1999年第1期13卷 24-26页

作者： Yimin Sun zhiyu qiao Minghong He(Applied Science School, University of Science & Technology Beijing, Beijing 100083, China)(National Natural Science Foundation of China, Beijing 100083, China) Applied Science School University of Science and Technology Beijing Beijing 100083 China National Natural Science Foundation of China Beijing 100083 China

The artificial neural network (ANN) and the pattern recognition were applied to study the correlation of enthalpies of fusion for divalent rare earth halides with their microstructural parameters,such as ionic radius and electronegativity. The model,represented by a back-propagation netal network, was trained with a 12 set of published data for divalent rare earth halides and then was used to predict the unknown ones. Also the criterion equations were ptesented to determine the enthalpies of fuSion for divalent rare earth halides using pattern recognition in mis work. The results from the model in ANN and criterion equations are in very good agreement with reference data.

关键词： BP neural network pattern recognition enthalpy of fusion divalent rare earth halides microstructural parameters

The Anzhen Risk Scoring System for Acute Type A Aortic Dissection:A Prospective Observational Study Protocol

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Cardiovascular Innovations and Applications 2023年第1期7卷 25-31页

作者： Bo Jia Cheng Luo Chengnan Li Yipeng Ge Yongliang Zhong zhiyu qiao Haiou Hu Suwei Chen Junming Zhu Department of Cardiovascular Surgery Capital Medical University Beijing Anzhen Hospital of Capital Medical UniversityBeijing Institute of Heart Lung and Blood Vessel DiseasesBeijing Engineering Research Center of Vascular ProsthesesBeijingChina

Introduction:Acute type A aortic dissection(ATAAD)is a catastrophic disease with fatal *** syndrome(MPS)is a serious complication of ATAAD,with an incidence of 20–40%.Many studies have shown that MPS is the main risk factor for poor ATAAD ***,a risk scoring system for ATAAD based on MPS is ***,we designed a risk scoring system for ATAAD to assess mortality through quantitative assessment of relevant organ malperfusion and subsequently develop rational treatment *** and analysis:This was a prospective observational ***’perioperative clinical data were col-lected to establish a database of ATAAD(N≥3000)and determine whether these patients had malperfusion *** Anzhen risk scoring system was established on the basis of organ malperfusion by using a random forest survival model and a logistics *** better method was then chosen to establish a revised risk scoring *** and dissemination:This study received ethical approval from the Ethics Committees of Beijing Anzhen Hospital,Capital Medical University(KS2019034-1).Patient consent was waived because biological samples were not collected,and no patient rights were *** will be disseminated at scientific conferences and in peer-reviewed publications.

关键词： Acute type A Aortic Dissection 30-Day mortality Risk prediction Random Forest survival Malperfu-sion syndrome

DETERMINATION OF PrCl_3-NaCl-LiCl PHASE DIAGRAM

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Acta Metallurgica Sinica(English Letters) 1990年第7期3卷 15-19页

作者： qiao zhiyu WANG Mingsheng ZHENG Chaogui DUAN Shuzhen University of Science and Technology Beijing,Beijing,China qiao zhiyu,Professor,Dept.of Physical Chemistry University of Science and Technology Beijing,30 Xueyuan Road,Beijing 100083,China

PrCl_3-NaCl-LiCl phase diagram has been constructed from the phase diagrams of its sub-binary systems and of six quasi-binary systems measured by DTA *** is found that this ternary system is composed of five liquidus surfaces,seven second crystallization lines,two peritectic points and one eutectie *** temperatures and compositions of invariant points are as follows:P_1(416℃,30.3 mol% NaCl,44.2 mol% LiCl,25.5 mol% PrCl_3);P_2(409℃,25.0 mol% NaCl,50.0 mol% LiCl,25.0 mol% PrCl_3);E(404℃,20.0 mol% NaCl,55.4 mol% LiCl,24.6 mol% PrCl_3).

关键词： PrCl_3-NaCl-LiCl phase diagram molten salt