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  • Physics  (4)
  • UA 4381.B  (4)
  • 1
    Online Resource
    Online Resource
    AlSb THIN FILMS PREPARED BY DC MAGNETRON SPUTTERING AND ANNEALING
    World Scientific Pub Co Pte Ltd ; 2008
    In:  International Journal of Modern Physics B Vol. 22, No. 14 ( 2008-06-10), p. 2275-2283
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 22, No. 14 ( 2008-06-10), p. 2275-2283
    Abstract: Aluminum antimonide (AlSb) is thought to be a potential material for high efficiency solar cells. In this paper, AlSb thin films have been fabricated by DC magnetron sputtering on glass substrates. The sputtering target consists of aluminum and antimony, and the area ratio of Al to Sb is 7:3, which is derived from research into the relationship between the deposition rates of both the metals and sputtering power. XRD and AFM measurements show that the as-deposited films are amorphous, but become polycrystalline with an average grain size of about 20 nm after annealing in an argon atmosphere. From optical absorption measurements of annealed AlSb films, a band gap of 1.56 eV has been demonstrated. Hall measurements show that the films are p-type semiconductors. The temperature dependence of dark conductivity tested in vacuum displays a linear lnσ to 1/T curve, which indicates a conductivity activation energy of around 0.61 eV.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979208039447
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2008
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  • 2
    Online Resource
    Online Resource
    Analysis of gas flow over a cylinder at all Knudsen numbers based on non-newtonian constitutive models
    World Scientific Pub Co Pte Ltd ; 2020
    In:  International Journal of Modern Physics B Vol. 34, No. 14n16 ( 2020-06-30), p. 2040076-
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 34, No. 14n16 ( 2020-06-30), p. 2040076-
    Abstract: This paper is focused on the gas properties over a cylinder from continuum to rarefied regimes based on the non-Newtonian constitutive model. This new constitutive model is first derived from Eu’s nonequilibrium ensemble method, which is intended for accurate description of nonequilibrium flows. Some assumptions and simplifications are made during the establishing progress of the new constitutive model by both Eu and Myong. To verify its accuracy, temperature contours and skin frictions around the cylinder are simulated by this new model. The inflow Mach number is equal to 10 and the Knudsen number ranges from 0.002 to 0.05. All simulation results are compared with Navier–Stokes (NS) and the direct simulation Monte Carlo (DSMC) methods in detail. The comparisons of friction around the surface show that the non-Newtonian constitutive models are better than the linear constitutive relations of NS equations for the prediction of nonequilibrium flow and much more close to DSMC simulation results.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979220400767
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2020
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  • 3
    Online Resource
    Online Resource
    Effect of interface morphology on thermal contact resistance in thermal management of electronic devices
    World Scientific Pub Co Pte Ltd ; 2022
    In:  International Journal of Modern Physics B Vol. 36, No. 17 ( 2022-07-10)
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 36, No. 17 ( 2022-07-10)
    Abstract: The interfacial thermal resistance between two solid materials is usually obvious in thermal management technology, but there is still no way to eliminate it nor uniform measurement standard. When taking thermal measurements because the surface roughness of instrument probe and device package directly affects the interface morphology, the change of total thermal resistance caused by the thermal contact resistance (TCR) fluctuations disturbs the accuracy of internal thermal analysis of device. We prepared samples with different surface roughness and performed thermal measurements on them, compared with test under vacuum environment and the condition filled with thermal interface materials, respectively. We found the heat-transfer mechanism of interface. More importantly, it is shown that in the interval of surface roughness [Formula: see text], the TCR shows good consistency when filled with thermal interface materials. This result will help to improve the convenience of measurement for the accuracy of thermal measurement technology.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979222500928
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2022
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  • 4
    Online Resource
    Online Resource
    Factors of the Transition from Dilute Flow to Dense Flow in Two-Dimensional Channel
    World Scientific Pub Co Pte Ltd ; 2003
    In:  International Journal of Modern Physics B Vol. 17, No. 22n24 ( 2003-09-30), p. 4382-4386
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 17, No. 22n24 ( 2003-09-30), p. 4382-4386
    Abstract: Granular flow of steel beads from dilute flow to dense flow on an inclined two-dimensional channel is studied. The initial inflow Q 0 is always a dilute flow. A transition from dilute to dense is observed when D≤D c . In the dense flow the outflow rate (Q) depends only on opening (D), given by [Formula: see text]. For different inflow rate Q 0 in the dilute flow case, the relation between the transition critical exit width (D c ) and the channel width (W) is given. And in larger inflow, the critical exit width is approximately in proportion to the square root of inflow rate, [Formula: see text].
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979203022490
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2003
    Location Call Number Limitation Availability
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    Online Resource
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