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Preparation and Characteristic of Glass-Ceramics with Super Low Thermal Expansion Coefficient Wang Kun1,Zhao Chunxia1,Jiang Hui1,Chen Guangle1,Wang Shengjun1,Fan Shigang1 (1.Research Institute of Synthetic Crystals, Beijing 100018, China) Abstract:The preparation technics of glass-ceramics with super low coefficient of thermal expansion containing β-quartz solid solution as a main crystal......
:A Calculation model of activity coefficient for NaOH-NaAl(OH)4-Na2CO3-H2O system PENG Xiao-qi1, 2, 3, SONG Guo-hui1, SONG Yan-po1, 2, ZHANG Jian-zhi1, LIU Zhen-guo1 (1... and Na2CO3 were obtained by calibration regression on their experimental activity coefficients. The activity coefficient calculation model for NaOH-NaAl(OH)4-Na2CO3-H2O system was established based......
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took both matric suction and intermediate principal stress into account and was suitable for any lateral pressure coefficient. Comparability analysis and parametric studies were carried out...-consolidation, the critical load with lateral pressure coefficient of 1 is higher; the intermediate principal stress effect should be fully considered and an appropriate lateral pressure coefficient......
J. Cent. South Univ. (2018) 25: 1173-1181 DOI: https://doi.org/10.1007/s11771-018-3816-6 Dynamic model of saturator based on a global heat and mass transfer coefficient HUANG Di(黄地)1, 2, ZHOU Deng... saturator models are usually based on the theory of heat and mass transfer, which need two accurate coefficients to ensure convincing results. This work proposes a global heat and mass transfer coefficient......
Optimization of Coarse Aggregate Content based on Efficacy Coefficient Method汪振双School of Hydraulic and Engineering,Dalian University of Technology摘 要:coefficient method.The optimization results show that when coarse aggregate......
and RbCl-RbNO3-H2O ternary strong electrolyte aqueous solutions were developed based on the ion and molecule coexistence theory at 298.15 K. A transformation coefficient is needed to compare calculated mass.... Key words: RbCl-H2O; RbCl-RbNO3-H2O; mass action concentration; activity; coexistence theory; transformation coefficient ________________ ......
POSITIVE TEMPERATURE COEFFICIENT PHENOMENON OF CARBON LOADED NBR COMPOSITES万影摘 要:<正>The resistivity of conductive composites ofNBR(Butadiene nitrile rubber)filled with conductive car-bon black and two kinds of special organic fillers was mea-sured from room temperature to 90℃.In such semiconduc-tive systems.A possitive,temperature coefficient(PTC......
of the Cu-Bi composite coating has also been enhanced significantly. Key words: Cu-Bi coating; composite coating; microhardness; coefficient of friction; electroplating 1 Introduction Cu and Cu alloys...%. The volume fraction is even smaller. The Bi phase therefore does not affect the resistivity of Cu significantly. Fig. 8 Coefficient of friction of Cu coating (a) and Cu-Bi coating (b) prepared at 50 mA/cm2......
J. Cent. South Univ. Technol. (2011) 18: 1293-1298 DOI: 10.1007/s11771-011-0835-y Embodied coefficient of energy carriers and its calculation method LIU Meng(刘猛)1, 2, LI Bai-zhan(李百战)1, 2, YAO... production and transportation were investigated. And based on the life cycle theory, an embodied coefficient of energy carriers was proposed to quantify the embodied energy consumption. Moreover......
