Oriented surface nucleation in inorganic glasses – A review

2020 ◽  
pp. 100758
Author(s):  
Wolfgang Wisniewski ◽  
Christian Rüssel
Keyword(s):  
Oriented Surface ◽  
Surface Nucleation ◽  
Inorganic Glasses

Oriented surface nucleation and crystal growth in a 18BaO·22CaO·60SiO2 mol% glass used for SOFC seals

CrystEngComm ◽  
2018 ◽  
Vol 20 (6) ◽  
pp. 787-795 ◽  
Author(s):  
Wolfgang Wisniewski ◽  
Christian Thieme ◽  
Ralf Müller ◽  
Stefan Reinsch ◽  
Sonja-M. Groß-Barsnick ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Oriented Surface ◽  
Surface Nucleation ◽  
Unknown Phase

Oriented nucleation of walstromite as well as an unknown phase of the composition BaCaSi3O8 is detected after crystallizing a 37BaO·16CaO·47SiO2 (wt%) glass.

Oriented surface nucleation in diopside glass

2021 ◽  
Vol 562 ◽  
pp. 120661
Author(s):  
C. Tielemann ◽  
R. Busch ◽  
S. Reinsch ◽  
C. Patzig ◽  
T. Höche ◽  
...  
Keyword(s):  
Oriented Surface ◽  
Surface Nucleation

scholarly journals Reduction Mechanism of Fine Hematite Ore Particles in Suspension

2021 ◽  
Author(s):  
Zhiyuan Chen ◽  
Christiaan Zeilstra ◽  
Jan van der Stel ◽  
Jilt Sietsma ◽  
Yongxiang Yang
Keyword(s):  
Particle Size ◽  
Temperature Drop ◽  
Reduction Rate ◽  
Reduction Process ◽  
Reciprocal Relationship ◽  
Drop Tube ◽  
Surface Nucleation ◽  
Order Of Magnitude ◽  
Relationship Of ◽  
Kinetics Of

AbstractIn order to understand the pre-reduction behaviour of fine hematite particles in the HIsarna process, change of morphology, phase and crystallography during the reduction were investigated in the high temperature drop tube furnace. Polycrystalline magnetite shell formed within 200 ms during the reduction. The grain size of the magnetite is in the order of magnitude of 10 µm. Lath magnetite was observed in the partly reduced samples. The grain boundary of magnetite was reduced to molten FeO firstly, and then the particle turned to be a droplet. The Johnson-Mehl-Avrami-Kolmogorov model is proposed to describe the kinetics of the reduction process. Both bulk and surface nucleation occurred during the reduction, which leads to the effect of size on the reduction rate in the nucleation and growth process. As a result, the reduction rate constant of hematite particles increases with the increasing particle size until 85 µm. It then decreases with a reciprocal relationship of the particle size above 85 µm.

Nonclassical Surface Nucleation of 6CB at the Air–Liquid Interface of a 6CB Oil-in-Water Nanoemulsion

Langmuir ◽  
2021 ◽  
Author(s):  
Jin Tae Park ◽  
Govind Paneru ◽  
Masao Iwamatsu ◽  
Bruce M. Law ◽  
Hyuk Kyu Pak
Keyword(s):  
Liquid Interface ◽  
Surface Nucleation ◽  
Oil In Water ◽  
Air Liquid Interface

Role of Sm3+ on Mn Nanoparticles Embedded Zinc Tellurite Glasses Absorption and Luminescence Characteristic

2020 ◽  
Vol 981 ◽  
pp. 73-77
Author(s):  
Nurul Ainaa Najihah Busra ◽  
Ramli Arifin ◽  
Sib Krishna Ghoshal ◽  
Rodziah Nazlan
Keyword(s):  
Electric Field Effect ◽  
Tellurite Glasses ◽  
Solid State Lasers ◽  
Absorption Bands ◽  
Precise Control ◽  
Amorphous Nature ◽  
Xrd Patterns ◽  
Inorganic Glasses ◽  
Rare Earth Doped

Enhancing the optical performance of rare earth doped binary inorganic glasses is an ever-demanding quest. Samarium (Sm3+) doped zinc tellurite glasses containing Manganese (Mn) nanoparticles (NPs) with composition (59-x)TeO2-20ZnCl2-10ZnO-10Li2O-1Sm2O3-(x)Mn3O4, where x = 0 to 0.06 mol% are prepared by melt quenching technique. The role played by Mn NPs in enhancing the optical behaviors are analyzed and discussed. The XRD patterns confirm the amorphous nature of the glass. The UV-Vis-NIR spectra reveal seven prominent absorption bands of Sm3+ ions. The photoluminescence spectra display four peaks corresponding to 4G5/2→6H5/2, 4G5/2 →6H7/2, 4G5/2→6H9/2 and 4G5/2 →6H11/2 transitions. An enhancement in the luminescence intensity is observed up to 0.05 mol% concentration of NPs and the intensity quenches beyond it. The enhancement is attributed to local electric field effect of NPs in the proximity of Sm3+ ion. Our results on improved optical response via precise control of NPs contents may be useful for the development of solid state lasers and amplifiers.

Volume versus surface nucleation in freezing aerosols

2008 ◽  
Vol 77 (5) ◽  
Author(s):  
Ómar F. Sigurbjörnsson ◽  
Ruth Signorell
Keyword(s):  
Volume Versus ◽  
Surface Nucleation

Molecular Dynamics Studies of Surface Nucleation and Crystal Growth of Si on SiO2 Substrates

2005 ◽  
Vol 899 ◽  
Author(s):  
Byoung-Min Lee ◽  
Hong Koo Baik ◽  
Takahide Kuranaga ◽  
Shinji Munetoh ◽  
Teruaki Motooka
Keyword(s):  
Thin Film ◽  
Molecular Dynamics ◽  
Crystal Growth ◽  
Surface Energy ◽  
Md Simulations ◽  
Lower Surface ◽  
Surface Nucleation ◽  
Lower Surface Energy ◽  
Potential Parameters ◽  
Si Thin Film

AbstractMolecular dynamics (MD) simulations of atomistic processes of nucleation and crystal growth of silicon (Si) on SiO2 substrate have been performed using the Tersoff potential based on a combination of Langevin and Newton equations. A new set of potential parameters was used to calculate the interatomic forces of Si and oxygen (O) atoms. It was found that the (111) plane of the Si nuclei formed at the surface was predominantly parallel to the surface of MD cell. The values surface energy for (100), (110), and (111) planes of Si at 77 K were calculated to be 2.27, 1.52, and 1.20 J/m2, respectively. This result suggests that, the nucleation leads to a preferred (111) orientation in the poly-Si thin film at the surface, driven by the lower surface energy.

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