Investigation of the hygroscopic properties of Ca(NO&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt; and internally mixed Ca(NO&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;/CaCO&lt;sub&gt;3&lt;/sub&gt; particles by micro-Raman spectrometry

Abstract. To understand and predict the role of mineral aerosol particles processed by reactive nitrogen species in the atmosphere, the hygroscopic properties of both Ca(NO3)2 and Ca(NO3)2-containing mineral particles must be well understood. Using a micro-Raman system, the dehydration and hydration processes of micro-sized individual Ca(NO3)2 and internally mixed Ca(NO3)2/CaCO3 particles were investigated systematically. In addition to accurate quantification of the dependence of water content on relative humidity (RH), significant new spectroscopic evidence related to chemical structure was also obtained to confirm the occurrence of amorphous solid state and to better understand the phase transition process. The Ca(NO3)2 particles exhibit reversible behavior in the dehydration and hydration processes; they are in the state of solution droplets above 10% RH and amorphous hydrates below 7% RH, and phase transition occurs at 7–10% RH. The hygroscopic behavior of Ca(NO3)2/CaCO3 particles is identical to that of pure Ca(NO3)2 particles, suggesting a negligible effect of the inclusion of slightly soluble CaCO3.

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Investigation of the hygroscopic properties of Ca(NO3)2 and internally mixed Ca(NO3)2/CaCO3 particles by micro-Raman spectrometry

Atmospheric Chemistry and Physics ◽

10.5194/acp-8-7205-2008 ◽

2008 ◽

Vol 8 (23) ◽

pp. 7205-7215 ◽

Cited By ~ 48

Author(s):

Y. J. Liu ◽

T. Zhu ◽

D. F. Zhao ◽

Z. F. Zhang

Keyword(s):

Phase Transition ◽

Amorphous Solid ◽

Transition Process ◽

Raman Spectrometry ◽

Mineral Particles ◽

Hygroscopic Properties ◽

Phase Transition Process ◽

Hygroscopic Behavior ◽

Accurate Quantification

Abstract. To understand and predict the role of mineral aerosol particles processed by reactive nitrogen species in the atmosphere, the hygroscopic properties of both Ca(NO3)2 and Ca(NO3)2-containing mineral particles must be well understood. Using a micro-Raman system, the hygroscopic behaviors of micro-sized individual Ca(NO3)2 and internally mixed Ca(NO3)2/CaCO3 particles in both dehumidifying and humidifying processes were investigated systematically. In addition to accurate quantification of the dependence of water content on relative humidity (RH), significant new spectroscopic evidence related to chemical structure was also obtained to confirm the occurrence of amorphous solid state and to better understand the phase transition process. The Ca(NO3)2 particles exhibit reversible behavior in the dehumidifying and humidifying processes; they are in the state of solution droplets above 10% RH and amorphous hydrates below 7% RH, and phase transition occurs at 7–10% RH. The hygroscopic behavior of Ca(NO3)2/CaCO3 particles is identical to that of pure Ca(NO3)2 particles, suggesting a negligible effect of the slightly soluble CaCO3 inclusion on the hygroscopic behavior of a(NO3)2/CaCO3 particles.

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Water Mediates the Metastable Crystal-to-Stable Crystal Phase Transition Process in Phospholipid Aqueous Dispersion

The Journal of Physical Chemistry B ◽

10.1021/jp810820d ◽

2009 ◽

Vol 113 (4) ◽

pp. 869-872 ◽

Cited By ~ 10

Author(s):

Fu-Gen Wu ◽

Lin Chen ◽

Zhi-Wu Yu

Keyword(s):

Phase Transition ◽

Aqueous Dispersion ◽

Transition Process ◽

Crystal Phase ◽

Phase Transition Process ◽

Crystal Phase Transition

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The effect of Argon pressure dependent V thin film on the phase transition process of (020) VO2 thin film

Applied Surface Science ◽

10.1016/j.apsusc.2017.08.242 ◽

2018 ◽

Vol 427 ◽

pp. 304-311 ◽

Cited By ~ 9

Author(s):

Yifan Meng ◽

Kang Huang ◽

Zhou Tang ◽

Xiaofeng Xu ◽

Zhiyong Tan ◽

...

Keyword(s):

Thin Film ◽

Phase Transition ◽

Transition Process ◽

Argon Pressure ◽

Phase Transition Process

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Exploration of Doubly Thermal Phase Transition Process of PDEGA-b-PDMA-b-PVCL in Water

Langmuir ◽

10.1021/acs.langmuir.6b01785 ◽

2016 ◽

Vol 32 (26) ◽

pp. 6691-6700 ◽

Cited By ~ 13

Author(s):

Zhangxin Ye ◽

Youcheng Li ◽

Zesheng An ◽

Peiyi Wu

Keyword(s):

Phase Transition ◽

Transition Process ◽

Thermal Phase Transition ◽

Phase Transition Process ◽

Thermal Phase

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A New Lattice Boltzmann Model for Phase Transition Process

Volume 13: New Developments in Simulation Methods and Software for Engineering Applications; Safety Engineering, Risk Analysis and Reliability Methods; Transportation Systems ◽

10.1115/imece2009-10961 ◽

2009 ◽

Author(s):

Longjian Li ◽

Jianbang Zeng ◽

Quan Liao ◽

Wenzhi Cui

Keyword(s):

Phase Transition ◽

Lattice Boltzmann ◽

Equations Of State ◽

Density Ratio ◽

Transition Process ◽

Lattice Boltzmann Model ◽

New Model ◽

Phase Transition Process ◽

Simulation Results ◽

Boltzmann Model

A new lattice Boltzmann model, which is based on Shan-Chen (SC) model, is proposed to describe liquid-vapor phase transitions. The new model is validated through simulation of the one-component phase transition process. Compared with the simulation results of van der Waals fluid and the Maxwell equal-area construction, the results of new model are closer to the analytical solutions than those of SC model and Zhang model. Since the range of temperature and the maximum density ratio are increased, and the value of maximum spurious current is between those of SC and Zhang models, it is believed that this new model has better stability than SC and Zhang models. Therefore, the application scope of this new model is expanded. According to the principle of corresponding states in Engineering Thermodynamics, the simulations of water and ammonia phase transition process are implemented by using this new model with different equations of state. Compared to the experimental data of water and ammonia, the results show that the Peng-Robinson equation of state is more suitable to describe the water, ammonia and other substances phase transition process. Therefore, these simulation results have great significance for the real engineering applications.

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Influence of the surface layer on the phase transition process in an inhomogeneous medium with account of heat flux relaxation

Journal of Applied Mechanics and Technical Physics ◽

10.1007/bf02369781 ◽

1995 ◽

Vol 36 (3) ◽

pp. 422-427

Author(s):

N. V. Solov'ev ◽

A. V. Talonov

Keyword(s):

Phase Transition ◽

Heat Flux ◽

Surface Layer ◽

Inhomogeneous Medium ◽

Transition Process ◽

Phase Transition Process ◽

Flux Relaxation ◽

Heat Flux Relaxation

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CROSSOVER FROM RABI TO JOSEPHSON DYNAMICS IN TWO-COUPLED BOSE–EINSTEIN CONDENSATES AS A PHASE TRANSITION PROCESS

Modern Physics Letters B ◽

10.1142/s0217984902004640 ◽

2002 ◽

Vol 16 (27) ◽

pp. 1021-1026 ◽

Cited By ~ 3

Author(s):

ARANYABHUTI BHATTACHERJEE ◽

MAN MOHAN

Keyword(s):

Phase Transition ◽

Mean Field ◽

Perturbation Expansion ◽

Transition Process ◽

Field Energy ◽

Linear Perturbation ◽

Small Oscillations ◽

Phase Transition Process ◽

Tunneling Matrix Element ◽

Bose Einstein

Crossover from individual Rabi dynamics to collective Josephson dynamics in two-coupled Bose–Einstein condensates is studied as a phase transition process. We obtain the critical value of the parameter Λ (ratio of the mean field energy to the tunneling matrix element) for the π-phase oscillations from the non-linear perturbation expansion of small oscillations around the saddle point of the first-order Euclidean (imaginary time) differential equations for polar and azimuthal angles θ and ϕ without approximation.

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