Results 31 to 40 of about 7,016 (252)

Hydrodynamics and heat exchange of crystal pulling from melts. Part I: Experimental studies of free convection mode [PDF]

Modern Electronic Materials, 2019
This work is a brief overview of experimental study results for hydrodynamics and convective heat exchange in thermal gravity capillary convection modes for the classic Czochralski technique setup obtained at the Institute of Thermophysics, Siberian ...
Vladimir S. Berdnikov
doaj   +3 more sources

Czochralski-grown LaxGdyRzSc4-x-y-z(BO3)4 (R = Yb, Nd) crystals - A review of recent developments

Optical Materials: X, 2020
Bifunctional crystals, in which the laser effect and a nonlinear optical (NLO) process, e.g. frequency doubling, can occur simultaneously, play a key role in the development of new laser sources with emission in the near-infrared (NIR) or visible (VIS ...
Lucian Gheorghe, Alin Broasca, Madalin Greculeasa, Flavius Voicu, George Stanciu, Stefania Hau, Gabriela Croitoru, Catalina Alice Brandus, Cristina Gheorghe, Federico Khaled, Pascal Loiseau, Gérard Aka   +11 more
doaj   +1 more source

Phonon anomalies in optical spectra of LnNbO3 single crystals [PDF]

Journal of the Serbian Chemical Society, 2004
LiNbO3 single crystals were grown by the Czochralski technique in an air atmosphere. The critical crystal diameter Dc = 1.5 cm and the critical rate of rotation ωc=35 rpm were calculated by equations from the hydrodynamics of the melt.
Golubović Aleksandar V., Gajić Radoš, Hinić Ivana I., Valčić Andreja   +3 more
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Nd pronounced anharmonicity in IR spectra of CaWO4 single crystals [PDF]

Science of Sintering, 2006
CaWO4 and Nd:CaWO4 (0.8 at. % Nd) single crystals were grown from the melt by the Czochralski technique in air. The crystal growth parameters dc and ωc were calculated by equations from the hydrodynamics of the melt, whereas the rate of crystal growth ...
Golubović A., Gajić R., Dohčević-Mitrović Z., Nikolić S.   +3 more
doaj   +1 more source

Concentration of atomic hydrogen diffused into silicon in the temperature range 900–1300 °C [PDF]

, 1991
Boron-doped Czochralski silicon samples with [B]~1017 cm−3 have been heated at various temperatures in the range 800–1300 °C in an atmosphere of hydrogen and then quenched.
E. C. Lightowlers, J. H. Tucker, M. Goulding, Peale R. E., Ponce F. A., R. A. A. Kubiak, R. C. Newman, S. A. McQuaid   +7 more
core   +1 more source

Control of Oxygen Impurities in a Continuous-Feeding Czochralski-Silicon Crystal Growth by the Double-Crucible Method

Crystals, 2021
The continuous-feeding Czochralski method is a cost-effective method to grow single silicon crystals. An inner crucible is used to prevent the un-melted silicon feedstock from transferring to the melt-crystal interface in this method.
Wenhan Zhao, Jiancheng Li, Lijun Liu
doaj   +1 more source

Smart Design of Cz-Ge Crystal Growth Furnace and Process

Crystals, 2022
The aim of this study was to evaluate the potential of the machine learning technique of decision trees to understand the relationships among furnace design, process parameters, crystal quality, and yield in the case of the Czochralski growth of ...
Natasha Dropka, Xia Tang, Gagan Kumar Chappa, Martin Holena   +3 more
doaj   +1 more source

Growth and Investigation of Nd_{1-x}Sm_{x}ScO_{3} and Sm_{1-x}Gd_{x}ScO_{3} Solid-Solution Single Crystals

, 2013
The pseudo-cubic lattice parameters of rare-earth (RE) scandate, REScO3, single crystals grown by the Czochralski technique with RE=Dy to Pr lie between about 3.95 and 4.02 Angstrom.
Bernhagen, M., Bertram, R., Brützam, M., Gesing, Th. M., Klimm, D., Kwasniewski, A., Schlom, D. G., Schulze-Jonack, I., Uecker, R.   +8 more
core   +1 more source

Electromigration process for the purification of molten silicon during crystal growth [PDF]

, 1982
A process for the purification of molten materials during crystal growth by electromigration of impurities to localized dirty zones. In the Czochralski crystal growing process, the impurities are electromigrated away from the crystallization interface by
Shlichta, P. J.
core   +1 more source

The growth of ZnO crystals from the melt

, 2008
The peculiar properties of zinc oxide (ZnO) make this material interesting for very different applications like light emitting diodes, lasers, and piezoelectric transducers.
Bates, D. Klimm, D. Schulz, Desgreniers, Frank, Gadzhiev, Halvorson, Helbig, Iwanaga, Jordan, Logan, Look, Machida, Maeda, Miller, Naumowicz, Nause, Nause, Ohshima, R. Fornari, Reynolds, Richman, S. Ganschow, Sadofev, Sato, Schiefelbein, Schulz, Tomm, Uecker, Wanklyn, Wenzl   +30 more
core   +1 more source