Research Progress on Application of Magnetic Suspension Balance in Basic Physical Properties Measurement

2011 ◽  
Vol 301-303 ◽  
pp. 1568-1573 ◽  
Author(s):  
Yong Shen ◽  
Yi Zhang ◽  
Yong Chen Song ◽  
Ying Hua Guan ◽  
Wei Wei Jian ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Diffusion Coefficient ◽  
Interfacial Tension ◽  
Physical Properties ◽  
High Precision ◽  
Specific Volume ◽  
Magnetic Suspension ◽  
Research Progress ◽  
Fluid Viscosity ◽  
Magnetic Suspension Balance

Basic physical properties of solutions with high precision are highly needed. The conventional devices can’t meet this demand. However, the magnetic suspension balance (MSB) could solve this problem. This paper summarizes the applications of MSB on the basic physical properties such as density, solubility, diffusion coefficient, adsorption, mass transfer, interfacial tension, specific volume, and so on. There is also a brief introduction about the measurement on fluid viscosity by the MSB after renovation.

Water Vapor Adsorption–Desorption Behavior of a Small Piece of Desiccant Rotor in Temperature Swing

2011 ◽  
Author(s):  
Akio Kodama ◽  
Yasuko Washio ◽  
Kumiko Okamoto ◽  
Yugo Osaka
Keyword(s):  
Mass Transfer ◽  
Water Vapor ◽  
Driving Force ◽  
Water Vapor Adsorption ◽  
Magnetic Suspension ◽  
Adsorption And Desorption ◽  
Magnetic Suspension Balance ◽  
Temperature Swing ◽  
Time Variations ◽  
Adsorption Desorption

This study aims to clarify the adsorption / desorption behavior of water vapor onto / from a desiccant rotor in temperature swing. A magnetic suspension balance followed time variations of the weight of a small piece of desiccant rotor at various desorption temperature, adsorption / desorption time and their duration time ratio. Adsorption-desorption swing in steady state settled down at certain amplitude of the amount adsorbed keeping the balance of the adsorption and desorption rates averaged over each period. At low regeneration temperature around 40–50°C, adsorption and desorption rates were affected considerably by the change of driving force of adsorption q*-q rather than the temperature dependence of the mass transfer coefficient. At constant adsorption and desorption air conditions, the adsorption /desorption rates could be summarized by the amount of adsorption and temperature, independently of the length of cycle time. Also, region of the amount of adsorption at which adsorption–desorption swing occurred was predicted considering the adsorption / desorption rates – amount adsorbed relationship and the adsorption / desorption duration ratio.

Research progress of high-precision surface metrology of a K-B mirror

2020 ◽  
Vol 13 (4) ◽  
pp. 660-675
Author(s):  
ZHANG Shuai ◽  
◽  
◽  
HOU Xi ◽  
◽  
...  
Keyword(s):  
High Precision ◽  
Research Progress ◽  
Surface Metrology

Stress Effects in Drying Polymer Films

1994 ◽  
Vol 356 ◽  
Author(s):  
S. Y. Tam ◽  
L. E. Scriven ◽  
H. K. Stolarski
Keyword(s):  
Thin Films ◽  
Mass Transfer ◽  
Diffusion Coefficient ◽  
Polymer Films ◽  
Material Properties ◽  
Film Surface ◽  
Viscoplastic Material ◽  
Stress Effects ◽  
Diffusion And Convection ◽  
Extra Stress

AbstractA model is developed to predict the magnitude and pattern of stress due to drying of polymer films. This model combines diffusion-and-convection equation with large deformation elasto-viscoplasticity, utilizing concentration dependent elastic and viscoplastic material properties to better represent the behavior of drying thin films.The results show that the highest stress occurs at film surface where the concentration depletion is the highest. The magnitude of this stress is induced by increasing mass transfer across the film surface but reduced by increasing diffusion coefficient. The edge effect is significant but local, limited to about four film thicknesses. Similarly, change in substrate induces extra stress.

scholarly journals Functional Nanoscale Phase Separation and Intertwined Order in Quantum Complex Materials

2021 ◽  
Vol 6 (4) ◽  
pp. 40
Author(s):  
Gaetano Campi ◽  
Antonio Bianconi
Keyword(s):  
Phase Separation ◽  
High Temperature ◽  
Physical Properties ◽  
High Precision ◽  
High Temperature Superconductors ◽  
Complex Materials ◽  
Structural Units ◽  
X Ray ◽  
Nanoscale Phase Separation ◽  
Complex Matter

Nanoscale phase separation (NPS), characterized by particular types of correlated disorders, plays an important role in the functionality of high-temperature superconductors (HTS). Our results show that multiscale heterogeneity is an essential ingredient of quantum functionality in complex materials. Here, the interactions developing between different structural units cause dynamical spatiotemporal conformations with correlated disorder; thus, visualizing conformational landscapes is fundamental for understanding the physical properties of complex matter and requires advanced methodologies based on high-precision X-ray measurements. We discuss the connections between the dynamical correlated disorder at nanoscale and the functionality in oxygen-doped perovskite superconducting materials.

scholarly journals Исследование коэффициента диффузии в тонких изделиях из пористых материалов

2019 ◽  
Vol 89 (10) ◽  
pp. 1630
Author(s):  
В.П. Беляев ◽  
С.В. Мищенко ◽  
П.С. Беляев
Keyword(s):  
Mass Transfer ◽  
Porous Media ◽  
Diffusion Coefficient ◽  
Transfer Process ◽  
Noise Immunity ◽  
Measurement Accuracy ◽  
High Sensitivity ◽  
Mass Transfer Process ◽  
Static Characteristic ◽  
Rapid Diffusion

A new method for studying mass transfer process in porous media has been considered, which allows the rapid diffusion coefficient control in thin products without destroying them and without the preliminary calibration of the diffuser concentration meter. The method provides an increase in the measurement accuracy due to the possibility of choosing the measured parameters included in the design expression. Parameters are taking from the segments of converter static characteristic. The converter has high sensitivity and noise immunity.

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