Academic literature on the topic 'Sublimation Temperature'

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Journal articles on the topic "Sublimation Temperature"

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Anishchenko, Oleksandr, Volodymyr Kukhar, Viktor Agarkov, and Alla Vorobeva. "Mathematical model development for superplastic forming of sheet shells by subliming agent gas pressure." E3S Web of Conferences 135 (2019): 01002. http://dx.doi.org/10.1051/e3sconf/201913501002.

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The authors presented in the article an analytical model of superplastic forming of spherical shells by pressure of the gas (gaseous phase) created upon sublimation of sublimate agent. Sublimate was placed in a hermetic cavity between the workpiece and the presser cover and heated to the temperature of its sublimation. The model uses the Berthelot equation for the state of real gases, the Bernoulli relation, and the F. Jovane equations for adjusting the shell forming pressure as a function of its relative height, the heat balance equation for the sublimation process, and the Clausius-Clapeyron
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Mikalauskas, Kazys, Emilis Urba, Paulius Miškūnas, Dmitrij Smirnov, Andrius Burokas, and Rimantas Miškinis. "Realization of the sublimation temperature point of carbon dioxide." Lithuanian Journal of Physics 53, no. 3 (2013): 127–34. http://dx.doi.org/10.3952/physics.v53i3.2717.

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Matsumura, Keisuke, Kodo Kawase, and Kei Takeya. "Observation of sublimation of ice using terahertz spectroscopy." Royal Society Open Science 7, no. 9 (2020): 192083. http://dx.doi.org/10.1098/rsos.192083.

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Although many studies have investigated the phase change of water, few have focused on the sublimation of ice. This study revealed that ice sublimation can be observed using terahertz (THz) spectroscopy. From measurements in the range of 210–270 K, the sublimation was observed over the entire temperature range and the rate of sublimation was increased proportionally with temperature. Particularly on a time scale of a few hundred minutes, the sublimation progresses visibly above 250 K. Above a certain temperature, the absorption coefficient increased during sublimation. These findings suggest t
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Magee, Nathan, Kayla Spector, Yi-Hsuan Lin, Corey Tong, and John Beatty. "Initial Ice Microparticle Sublimation Measurements from the Levitating Upper-Tropospheric Environmental Simulator (LUTES)." Journal of Atmospheric and Oceanic Technology 28, no. 7 (2011): 884–90. http://dx.doi.org/10.1175/jtech-d-11-00028.1.

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Abstract Initial ice particle sublimation data are presented from the new Levitating Upper-Tropospheric Environmental Simulator (LUTES) at The College of New Jersey. This experimental system mimics the conditions of a typical cirrus cloud in order to evaluate the phase-change kinetics of single ice particles. These ice particles are charged and then trapped in a levitating electrodynamic balance where they can be observed as they sublimate in a subsaturated atmosphere. Levitation and sublimation take place within a vacuum chamber, which is contained in a freezer at a temperature of −40° to −80
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Neumann, T. A., M. R. Albert, R. Lomonaco, C. Engel, Z. Courville, and F. Perron. "Experimental determination of snow sublimation rate and stable-isotopic exchange." Annals of Glaciology 49 (2008): 1–6. http://dx.doi.org/10.3189/172756408787814825.

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AbstractSnow sublimation is a fundamental process that affects the snow crystal structure and is important for ice-core interpretation, remote sensing, snow hydrology and chemical processes in snow. Prior studies have shown that sublimation can change the isotopic content of the remaining snow; these studies have inferred sublimation rates using field data, and were unable to control many of the environmental parameters that determine sublimation rate (e.g. temperature, relative humidity, snow microstructure). We present sublimation rate measurements on snow samples in the laboratory, where we
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Bintanja, Richard. "The contribution of snowdrift sublimation to the surface mass balance of Antarctica." Annals of Glaciology 27 (1998): 251–59. http://dx.doi.org/10.3189/1998aog27-1-251-259.

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This paper presents model calculations of snowdrift sublimation rates for year-round automatic weather station (AWS) data in Terre Adélie, Antarctica. The model calculates vertical profiles of wind speed, temperature, humidity and suspended-snow particles in the atmospheric surface layer, and takes into account the buoyancy effects induced by the stably stratified suspended-snow profile by means of an appropriate Richardson number. The model is able to simulate accurately vertical profiles of sublimation rate derived from direct measurements. The model is used to parameterise snowdrift-sublima
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Beretta, Gian Paolo, Alfonso Niro, and Mario Silvestri. "Solid Slider Bearings Lubricated by Their Own Melting or Sublimation." Journal of Tribology 109, no. 2 (1987): 296–300. http://dx.doi.org/10.1115/1.3261355.

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We study the steady-state hydrodynamic lubrication of a solid-solid sliding bearing with spontaneous fusion or sublimation of the solid slider substance. Lubrication is sustained by the fluid film produced by fusion or sublimation. Our analysis extends the recent literature on liquid film lubrication of a melting solid slider to the interesting case of gaseous film lubrication of a sublimating solid slider. The results are in the form of analytical expressions showing the explicit influence of every parameter of the problem, together with conditions specifying the range of validity, and condit
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Lysenko, Vladimir I., Sergey A. Gaponov, Boris V. Smorodsky, Alexander D. Kosinov, and Mikhail I. Yaroslavtsev. "Stability of Supersonic Boundary Layer on the Sublimation Surface." Siberian Journal of Physics 15, no. 1 (2020): 42–61. http://dx.doi.org/10.25205/2541-9447-2020-15-1-42-61.

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Theoretical investigation of the supersonic flat-plate boundary-layer properties under conditions of the surface material sublimation has been performed for Mach number M = 2. Naphthalene (C10H8) was chosen as the substance for the sublimation coating. Performed computations show that with increasing surface temperature due to stagnation temperature increase, the mass flow rate of naphthalene evaporation increases. Calculations performed on the basis of linear stability theory show that such an increase of evaporation leads to a noticeable decrease of the local growth rates of unstable perturb
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Sharma, Varun, Francesco Comola, and Michael Lehning. "On the suitability of the Thorpe–Mason model for calculating sublimation of saltating snow." Cryosphere 12, no. 11 (2018): 3499–509. http://dx.doi.org/10.5194/tc-12-3499-2018.

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Abstract. The Thorpe and Mason (TM) model for calculating the mass lost from a sublimating snow grain is the basis of all existing small- and large-scale estimates of drifting snow sublimation and the associated snow mass balance of polar and alpine regions. We revisit this model to test its validity for calculating sublimation from saltating snow grains. It is shown that numerical solutions of the unsteady mass and heat balance equations of an individual snow grain reconcile well with the steady-state solution of the TM model, albeit after a transient regime. Using large-eddy simulations (LES
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Lin, Sui. "Exact Solution for Determination of the Maximum Sublimation Rate in a Porous Medium." Journal of Heat Transfer 124, no. 3 (2002): 525–29. http://dx.doi.org/10.1115/1.1470168.

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The optimum condition for the sublimation process taking place in a porous half space are determined in this paper. The vapor mass concentration at the surface of the porous medium and the initial frozen mass concentration in the frozen region are predetermined. The optimum condition is found by determining the vapor mass concentration at the sublimation front between the vapor and frozen phases, that yields the maximum flux of the vapor mass at the sublimation front. Exact solutions of the temperature and vapor mass concentration as well as the location of the moving sublimation front are obt
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Dissertations / Theses on the topic "Sublimation Temperature"

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Chen, I. Kang. "Design of a Polymeric Coating for Protecting Thermoelectric Materials from Sublimation and Oxidation." Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1538763/.

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Thermoelectric (TE) devices can undergo degradation from reactions in corrosive environments and at higher operating temperatures by sublimation and oxidation. To prevent the degradation, we have applied two high temperature polymers (HTPs) as coatings for TE materials. Sintering temperatures were from 250°C to 400°C. We explain why dip coating is better technique in our study and had two potential HTPs for tests. By applying TGA (thermogravimetric analysis), we were able to figure out which HTPs have better thermal resistivity. Besides, TGA also help us to find proper curing cycles for HTPs.
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Berlin, Katja. "In-situ transmission electron microscopy on high-temperature phase transitions of Ge-Sb-Te alloys." Doctoral thesis, Humboldt-Universität zu Berlin, 2018. http://dx.doi.org/10.18452/19219.

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Das Hochtemperaturverhalten beeinflusst viele verschiedene Prozesse von der Materialherstellung bis hin zur technologischen Anwendung. In-situ Transmissionselektronenmikroskopie (TEM) bietet die Möglichkeit, die atomaren Prozesse während struktureller Phasenübergänge direkt und in Realzeit zu beobachten. In dieser Arbeit wurde in-situ TEM angewendet, um die Reversibilität des Schmelz- und Kristallisationsprozesses, sowie das anisotropen Sublimationsverhaltens von Ge-Sb-Te (GST) Dünnschichten zu untersuchen. Die gezielte Probenpräparation für die erfolgreiche Beobachtung der Hochtemperatur-Phas
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Apte, Pankaj A. "Phase equilibria and nucleation in condensed phases: a statistical mechanical study." The Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1135876018.

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Mullenix, Nathan Joel. "Fully Coupled Model for High-Temperature Ablation and a Reative-Riemann Solver for its Solution." University of Akron / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1271035105.

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Wongpromrat, Wichitra. "Étude de la sublimation du chrome lors de l’oxydation haute température de l’alliage AISI 441 et recherche de solutions de protection." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAI070/document.

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Les aciers inoxydables ferritiques sont actuellement les meilleurs candidats pour répondre au cahier des charges des matériaux destinés aux interconnexions de piles à combustibles à oxyde solide (SOFC acronyme anglo-saxon pour Solid Oxide Fuel Cell). Cependant, du coté du compartiment cathodique de ces piles, le phénomène de sublimation du chrome à haute température conduit à des dégradations importantes, réduisant ainsi la durée de vie en service des SOFC. Les objectifs de ce travail de thèse sont (i) d'étudier le phénomène de sublimation du chrome sur l'acier inoxydable ferritique AISI 441 e
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Gustaitytė, Indrė. "Vaistinės augalinės žaliavos džiovinimas žematemperatūrinėje aplinkoje." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130621_140707-18818.

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Pasaulio sveikatos organizacijos duomenimis, vaistiniai augalai apibūdinami kaip labai vertingi gydomieji augalai. Didžiausią įtaką vaistinės augalinės žaliavos kokybei ir biologiškai veikliųjų medžiagų kiekiui turi džiovinimo būdas, džiovinimo sąlygos ir žaliavos nuėmimo laikas. Tyrimų tikslas – ištirti šalčio poveikį vaistinės augalinės žaliavos paprastosios sukatžolės (Leonurus cardiaca L.) kokybei ir džiūvimo procesui sublimacinėmis sąlygomis. Atlikti palyginamieji vaistinės augalinės žaliavos, paprastosios suktžolės (Leonurus cardiaca L.), džiovinimo tyrimai -16 °C , -10 °C ir 40 °C tempe
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Lambrinos, Grégoire. "Sublimation des milieux disperses congeles soumis a des temperatures negatives." Paris 6, 1988. http://www.theses.fr/1988PA066637.

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Benchkoura, Abdel-Illah. "Modélisation du transport de volatils à la surface des planètes et satellites glacés du système solaire : application à Triton et Pluton." Université Joseph Fourier (Grenoble), 1996. http://www.theses.fr/1996GRE10222.

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Le but general de cette these est la modelisation numerique de l'evolution spatio-temporelle de la composition et de la temperature de la surface des satellites et planetes glaces, en particulier de triton et pluton. On expose tout d'abord l'etat actuel de nos connaissances concernant les surfaces de triton et pluton (nature, composition, temperature, albedos) et on etablit un bilan complet des modeles de transport de volatils a la surface de ces deux corps cryogeniques. En se basant sur ces derniers travaux on a, au depart, developpe un modele thermodynamique permettant d'etudier le transport
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Books on the topic "Sublimation Temperature"

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Magee, Patrick, and Mark Tooley. Physics in anaesthesia. Edited by Antony R. Wilkes and Jonathan G. Hardman. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780199642045.003.0023.

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This chapter covers the basic science of physics relevant to anaesthetic practice. Equipment and measurement devices are covered elsewhere. Starting with fundamentals, atomic structure is introduced, followed by dimensions and units as used in science. Basic mechanics are then discussed, focusing on mass and density, force, pressure, energy, and power. The concept of linearity, hysteresis, and frequency response in physical systems is then introduced, using relevant examples, which are easy to understand. Laminar and turbulent fluid flow is then described, using flow measurement devices as app
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Book chapters on the topic "Sublimation Temperature"

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Delsemme, A. H. "The Sublimation Temperature of the Cometary Nucleus: Observational Evidence for H2O Snows." In Ices in the Solar System. Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5418-2_24.

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Chen, Lin. "New Mechanisms for Cryogenic Solid-Gas Sublimation Refrigeration." In Handbook of Research on Advances and Applications in Refrigeration Systems and Technologies. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-8398-3.ch004.

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Sublimation is one phase change mechanism which usually happens under low-to-moderate temperatures and at the same time large amounts of latent heat is absorbed or released. Low temperature sublimation has been proposed in a lot of applications as one useful fast cooling/refrigeration mechanisms, such as medical cooling, food engineering, chemical synthesis, domestic cooling and many industrial sectors. In this brief chapter, the basic mechanisms of static sublimation process and sublimation two-phase flows are clarified and analyzed first, which covers the theoretical and physical problems of sublimation phase-change. Then the previous studies are classified into numerical modeling and experimental verifications. Representative refrigeration systems are also introduced and compared in this chapter, which may give useful indications for future innovations in this field. Future research focuses are also summarized and proposed in this chapter.
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Odetola, Peter Ifeolu, Patricia A. P. Popoola, and Philip Oladijo. "Thin Coating Deposition by Magnetron Sputtering." In Production, Properties, and Applications of High Temperature Coatings. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-4194-3.ch015.

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Advances in thin-film deposition expose new frontiers to structures and phases that are inaccessible by conventional chemical means and have led to innovative modification of existing materials' properties. Thin-film deposition by magnetron sputtering is highly dependent on ion bombardments; coupled with sublimation of solid target unto the substrate through momentum transfer. It is summarily base on phase change of target material under high-energy influence; corresponding controlled condensation of sputtered atoms on substrate material during which process parameters and growth conditions dictate the pace of the atomic scale processes for thin-film formation. Magnetron sputtering is a state-of-the-art thin film deposition technique versatile for several unique applications, especially in the semiconductor industry. Magnetron sputtering is very novel in its use to achieve low-pressure condition that maximizes and conserve stream of electrons for effective knocking of inert atoms into ions. This ensures the high-energy acquired is not dissipated in gas-phase collisions.
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Low, I. M., and W. K. Pang. "Decomposition Kinetics of MAX Phases in Extreme Environments." In MAX Phases and Ultra-High Temperature Ceramics for Extreme Environments. IGI Global, 2013. http://dx.doi.org/10.4018/978-1-4666-4066-5.ch002.

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MAX phases are remarkable materials but they become unstable at elevated temperatures and decompose into binary carbides or nitrides in inert atmospheres. The susceptibility of MAX phases to thermal dissociation at 1300-1550 °C in high vacuum has been studied using in-situ neutron diffraction. Above 1400 °C, MAX phases decomposed to binary carbide (e.g., TiCx) or binary nitride (e.g., TiNx), primarily through the sublimation of A-elements such as Al or Si, which results in a porous surface layer of MXx being formed Positive activation energies were determined for decomposed MAX phases with coarse pores but a negative activation energy when the pore size was less than 1.0 µm. The kinetics of isothermal phase decomposition at 1550 °C was modelled using a modified Avrami equation. An Avrami exponent (n) of < 1.0 was determined, indicative of the highly restricted diffusion of Al or Si between the channels of M6X octahedra. The role of pore microstructures on the decomposition kinetics is discussed.
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"Formation of Graphene Layers by High-Temperature Sublimation of Silicon Carbide in Vacuum." In Graphene Science Handbook. CRC Press, 2016. http://dx.doi.org/10.1201/b19606-40.

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Anikin, M. M., P. A. Ivanov, A. A. Lebedev, S. N. Pytko, A. M. Strel'chuk, and A. L. Syrkin. "HIGH-TEMPERATURE DISCRETE DEVICES IN 6H-SiC: SUBLIMATION EPITAXIAL GROWTH, DEVICE TECHNOLOGY AND ELECTRICAL PERFORMANCE." In Semiconductor Interfaces and Microstructures. WORLD SCIENTIFIC, 1992. http://dx.doi.org/10.1142/9789814261722_0012.

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Blanchard, Lynnette A., and Gang Xu. "Phase Behavior and Its Effects on Reactions in Liquid and Supercritical Carbon Dioxide." In Green Chemistry Using Liquid and Supercritical Carbon Dioxide. Oxford University Press, 2004. http://dx.doi.org/10.1093/oso/9780195154832.003.0005.

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Carbon dioxide, either as an expanded liquid or as a supercritical fluid, may be a viable replacement for a variety of conventional organic solvents in reaction systems. Numerous studies have shown that many reactions can be conducted in liquid or supercritical CO2 (sc CO2) and, in some cases, rates and selectivities can be achieved that are greater than those possible in normal liquid- or gas-phase reactions (other chapters in this book; Noyori, 1999; Savage et al., 1995). Nonetheless, commercial exploitation of this technology has been limited. One factor that contributes to this reluctance is the extremely complex phase behavior that can be encountered with high-pressure multicomponent systems. Even for simple binary systems, one can observe multiple fluid phases, as shown in Figure 1.1. The figure shows the pressure–temperature (PT) projection of the phase diagram of a binary system, where the vapor pressure curve of the light component (e.g., CO2) is the solid line shown at temperatures below TB. It is terminated by its critical point, which is shown as a solid circle. The sublimation curve, melting curve, and vapor pressure curve of the pure component 2 (say, a reactant that is a solid at ambient conditions) are the solid lines shown at higher temperatures on the right side of the diagram; that is, the triple point of this compound is above TE. The solid might experience a significant melting point depression when exposed to CO2 pressure [the dashed–dotted solid/liquid/vapor (SLV) line, which terminates in an upper critical end point (UCEP)]. For instance, naphthalene melts at 60.1 °C under CO2 pressure (i.e., one might observe a three-phase solid/liquid/vapor system), even though the normal melting point is 80.5 °C (McHugh and Yogan, 1984). To complicate things even further, there will be a region close to the critical point of pure CO2 where one will observe three phases as well, as indicated by the dashed–dotted SLV line that terminates at the lower critical end point (LCEP). The dotted line connecting the critical point of the light component and the LCEP is a vapor/liquid critical point locus.
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Conference papers on the topic "Sublimation Temperature"

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Medina, Henry, Shi Wun Tong, Carlos Manzano, et al. "Low Temperature and Fast Growth of Polycrystalline MoS2 Films using Low Temperature Sublimation Sources." In 2019 Electron Devices Technology and Manufacturing Conference (EDTM). IEEE, 2019. http://dx.doi.org/10.1109/edtm.2019.8731147.

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Jianping, Ma, Chen Zhiming, and Feng Xianfeng. "Numerical Simulation of the Temperature Distribution in SiC Sublimation Growth System." In 2007 8th International Conference on Electronic Measurement and Instruments. IEEE, 2007. http://dx.doi.org/10.1109/icemi.2007.4350761.

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Wu, Bei, Ronghui Ma, and Hui Zhang. "Design and Optimization of an Aluminum Nitride Sublimation Growth System." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-41980.

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In this paper, an integrated model considering induction heating, heat transfer, growth kinetics and thermo-elastic stress has been developed to study temperature distribution in the growth system, crystal shape and stress distribution in the asgrown aluminum nitride (AIN) crystal. The electromagnetic field and induction heat generation are calculated by the Maxwell equations. Transient temperature distribution in the growth chamber is simulated by energy accounting for conduction/radiation within and between various components. To reduce thermal stress and dislocation, a growth method to enla
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Wu, Bei, and Hui Zhang. "Vapor Transport Controlled Process Models for AlN Bulk Sublimation Growth." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56564.

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Sublimation vapor transport method is a widely used technique for the production of optoelectronic materials, such as AlN single crystals. Inductively heated method is most commonly used in high temperature materials processing. In the literature, a one-step reaction with two vapor species, i.e. aluminum (Al) vapor and nitrogen (N2) gas, is usually assumed and a diffusion-controlled growth mechanism is used with thermodynamic equilibrium calculations. In the growth experiments, crystal growth may be in the kinetic controlled region, the interplay between surface kinetics and vapor transport is
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Wu, Bei, and Hui Zhang. "Dynamics of Thermal Field and Powder Sublimation in an Inductively Heated AlN Bulk Crystal Growth Process." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59169.

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In this paper, an integrated model considering induction heating, transient heat transfer and crystal growth has been developed to study dynamic response of temperature and powder sublimation in an aluminum nitride (AlN) growth system. The electromagnetic field and induction heat generation are calculated by the Maxwell equations. Transient temperature distribution in the growth chamber is simulated by energy equation accounting for conduction/radiation within and between various components. In order to provide proper temperature control during sublimation growth, dynamic responses of temperat
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Zhang, Dujiao, Guodong Meng, Kejing Wang, et al. "Effect of Flow Rate and Precursor Sublimation Temperature on the LPCVD Growth of Hexagonal Boron Nitride." In 2018 IEEE 2nd International Conference on Dielectrics (ICD). IEEE, 2018. http://dx.doi.org/10.1109/icd.2018.8468456.

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Zhang, Dujiao, Guodong Meng, Kejing Wang, et al. "Effect of Flow Rate and Precursor Sublimation Temperature on the LPCVD Growth of Hexagonal Boron Nitride." In 2018 IEEE 2nd International Conference on Dielectrics (ICD). IEEE, 2018. http://dx.doi.org/10.1109/icd.2018.8514601.

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Sakly, M., Jaime Aguirre-Puente, and G. Lambrinos. "Experimental Study of the Sublimation of Pure Ice under Very Low Temperature and Relative Humidity Conditions." In International Symposium on Heat and Mass Transfer in Refrigeration and Cryogenics. Begellhouse, 1986. http://dx.doi.org/10.1615/ichmt.1986.intsymphmtinrefcryo.220.

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Vorhauer, Nicole, P. Först, H. Schuchmann, and E. Tsotsas. "Pore network model of primary freeze drying." In 21st International Drying Symposium. Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/ids2018.2018.7284.

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The pore scale progression of the sublimation front during primary freeze drying depends on the local vapor transport and the local heat transfer as well. If the pore space is size distributed, vapor and heat transfer may spatially vary. Beyond that, the pore size distribution can substantially affect the physics of the transport mechanisms if they occur in a transitional regime. Exemplarily, if the critical mean free path is locally exceeded, the vapor transport regime passes from viscous flow to Knudsen diffusion. At the same time, the heat transfer is affected by the local ratio of pore spa
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Ohkubo, Hidetoshi, Masahiro Matsumura, Masayuki Ueno, and Koji Yamashita. "Effect of Cooling Surface Temperature on Frosting Phenomena Under Natural Convection." In ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ht2007-32749.

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Frosting is a phenomenon that takes place on a surface that has been cooled to a temperature below solidification temperature of water vapor in air. Frosting occurs by either sublimation or by solidification of condensate on the surface, and frost layer is a porous layer of ice and air. Advances in air-conditioning and refrigeration technology have brought about frosting issues in several fields as well as a broadening of the temperature range in which frosting occurs. In the present work, we investigated mass transfer characteristics in frosting phenomenon under natural convection condition i
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