In situ visualization of the quasi-periodic crystal growth interface fluctuation by growth interface electromotive force spectrum in a Czochralski system

CrystEngComm ◽  
2019 ◽  
Vol 21 (7) ◽  
pp. 1107-1113 ◽  
Author(s):  
Yunzhong Zhu ◽  
Shaopeng Lin ◽  
Zhihua Liu ◽  
Wenjia Wang ◽  
Decai Ma ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Electromotive Force ◽  
Temperature Fluctuations ◽  
Crystal Growth Rate ◽  
Growth Interface ◽  
System P ◽  
Supercooling Degree ◽  
In Situ Visualization ◽  
Interface Fluctuation

Growth interface electromotive force (GEMF) visualizes the real-time states of crystal growth rate, supercooling degree and rotation temperature fluctuations.

In Situ Visualization on Crystal Growth of Sn-Bi Alloy Under Electric Field

PRICM ◽  
2013 ◽  
pp. 2509-2514
Author(s):  
Tongmin Wang ◽  
Jing Zhu ◽  
Fei Cao ◽  
Zongning Chen ◽  
Yanan Fu ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Electric Field ◽  
In Situ Visualization

In-situ detection of convection and rotation striations by growth interface electromotive force spectrum

2018 ◽  
Vol 487 ◽  
pp. 120-125 ◽  
Author(s):  
Yunzhong Zhu ◽  
Feng Tang ◽  
Xin Yang ◽  
Mingming Yang ◽  
Decai Ma ◽  
...  
Keyword(s):  
Electromotive Force ◽  
Growth Interface ◽  
In Situ Detection

scholarly journals Optimization of the SiC Powder Source Material for Improved Process Conditions During PVT Growth of SiC Boules

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3272
Author(s):  
Ellefsen ◽  
Arzig ◽  
Steiner ◽  
Wellmann ◽  
Runde
Keyword(s):  
Crystal Growth ◽  
Size Distribution ◽  
Growth Conditions ◽  
Source Material ◽  
Process Time ◽  
Process Conditions ◽  
Powder Size ◽  
Growth Interface ◽  
X Ray

We have studied the influence of different SiC powder size distributions and the sublimation behavior during physical vapor transport growth of SiC in a 75 mm and 100 mm crystal processing configuration. The evolution of the source material as well as of the crystal growth interface was carried out using in situ 3D X-ray computed tomography (75 mm crystals) and in situ 2D X-ray visualization (100 mm crystals). Beside the SiC powder size distribution, the source materials differed in the maximum packaging density and thermal properties. In this latter case of the highest packaging density, the in situ X-ray studies revealed an improved growth interface stability that enabled a much longer crystal growth process. During process time, the sublimation-recrystallization behavior showed a much smoother morphology change and slower materials consumption, as well as a much more stable shape of the growth interface than in the cases of the less dense SiC source. By adapting the size distribution of the SiC source material we achieved to significantly enhance stable growth conditions.

In Situ Visualization Of A Solid-Liquid Interface During Crystal Growth

1988 ◽  
Author(s):  
S B. Trivedi ◽  
T S. Ananthanarayanan ◽  
R G. Rosemeier ◽  
J J. Kennedy
Keyword(s):  
Crystal Growth ◽  
Liquid Interface ◽  
In Situ Visualization ◽  
Solid Liquid Interface ◽  
Solid Liquid

Investigation of the influence of pressurized CO2 on the crystal growth of poly(l-lactic acid) by using an in situ high-pressure optical system

Soft Matter ◽  
2019 ◽  
Vol 15 (28) ◽  
pp. 5714-5727 ◽  
Author(s):  
Lei Zhang ◽  
Guoqun Zhao ◽  
Guilong Wang
Keyword(s):  
High Pressure ◽  
Lactic Acid ◽  
Crystal Growth ◽  
Optical System ◽  
System P ◽  
Rhythmic Growth

The rhythmic growth of the bamboo-like branch of PLLA crystals under pressurized CO2.

Influence of Aging and Dilution on the Crystallization of Silicalite-1

1997 ◽  
Vol 30 (5) ◽  
pp. 675-679 ◽  
Author(s):  
P. P. E. A. de Moor ◽  
T. P. M. Beelen ◽  
R. A. van Santen
Keyword(s):  
Growth Rate ◽  
Crystal Growth ◽  
Small Angle ◽  
Crystal Growth Rate ◽  
X Ray ◽  
X Ray Scattering ◽  
Colloidal Aggregates ◽  
Mixture Prior ◽  
Ray Scattering

The correlation between the formation of colloidal aggregates and the crystallization of silicalite-1 from a clear solution has been investigated with in situ combined small-angle X-ray scattering and wide-angle X-ray scattering, and in situ ultra-small-angle X-ray scattering using synchrotron radiation. Increasing the aging time at room temperature of the synthesis mixture prior to heating to the reaction temperature reduced the induction period and increased the crystal growth rate without affecting the formation of colloidal aggregates. Dilution of the synthesis mixtures did not influence the nucleation and crystal growth rate, and did not affect the formation of colloidal aggregates.

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