Top Seeded Solution Growth of 4H-SiC Bulk Crystal Using Graphite Block for Long-Term Growth

2016 ◽  
Keyword(s):  
Bulk Crystal ◽  
Solution Growth ◽  
Graphite Block ◽  
Top Seeded Solution Growth

Top-Seeded Solution Growth of 3 Inch Diameter 4H-SiC Bulk Crystal Using Metal Solvents

2014 ◽  
Vol 778-780 ◽  
pp. 79-82 ◽  
Author(s):  
Kazuhiko Kusunoki ◽  
Kazuhito Kamei ◽  
Nobuhiro Okada ◽  
Koji Moriguchi ◽  
Hiroshi Kaido ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Growth Process ◽  
Single Crystal Growth ◽  
Solution Growth ◽  
Process Conditions ◽  
Process Stability ◽  
Growth Interface ◽  
Formation Technique ◽  
Top Seeded Solution Growth

We performed top-seeded solution growth of 4H-SiC for obtaining longer length crystal. Si-Cr and Si-Ti melts were used as solvents. Meniscus formation technique was applied to the present study. Special attention was paid to improve the process stability during long-term growth. One of major technological problems in the solution growth is that the precipitation of polycrystalline SiC which hiders the stable single crystal growth. Another problem is the fluctuation of supersaturation at the growth interface during the growth. Through the optimization of growth process conditions, we have successfully grown 4H-SiC single crystals up to 14 mm long with three-inch-diameter, and evaluated their crystalline quality.

Top-Seeded Solution Growth of 4H-SiC Bulk Crystal Using Si-Cr Based Melt

2012 ◽  
Vol 717-720 ◽  
pp. 61-64 ◽  
Author(s):  
Hironori Daikoku ◽  
M. Kado ◽  
H. Sakamoto ◽  
Hiroshi Suzuki ◽  
T. Bessho ◽  
...  
Keyword(s):  
Growth Rate ◽  
Seed Crystal ◽  
Solution Growth ◽  
Bulk Crystals ◽  
High Quality ◽  
Cross Sectional ◽  
Formation Technique ◽  
Top Seeded Solution Growth ◽  
Microscopy Images

We have grown high-quality long cylindrical (12 mm thick) 4H-SiC bulk crystals by the meniscus formation technique, which was first applied for the solution growth of bulk SiC. It enabled long-term growth by suppressing parasitic reactions such as polycrystal precipitation around the seed crystal. In addition, we could control the growth angle from −22° to 61° by adjusting the meniscus height. The thickness of the grown cylindrical crystals was 12 mm, which is the largest reported until now, and corresponded to a growth rate of 0.6 mm/h. Smooth morphology growth was maintained on the (000-1) C-face. In cross-sectional transmission optical microscopy images, few solvent inclusions and voids were observed. XRD measurements revealed that the FWHM values of the grown crystals were almost the same as those of the seed crystal.

YMgB5O10 crystal preparation and attractive multi-wavelength emission characteristics of doping Nd3+ ions

2021 ◽  
Author(s):  
Shijia Sun ◽  
Qi Wei ◽  
Bing-Xuan Li ◽  
Xingjun Shi ◽  
feifei yuan ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Transmission Spectrum ◽  
Systematic Investigation ◽  
Solution Growth ◽  
Emission Characteristics ◽  
Multi Wavelength ◽  
Growth Method ◽  
Wavelength Emission ◽  
Spectrum Band ◽  
Top Seeded Solution Growth

The pure and Nd3+-doped YMgB5O10 (YMB, Nd:YMB) crystals were grown successfully by the top-seeded solution growth method with composite fluxes Li2O-B2O3-LiF. The systematic investigation of crystal structure, transmission spectrum, band...

Growth of Ti alloyed Nb3Sn crystals from Sn-Ti-Nb solutions by top seeded solution growth

1986 ◽  
Vol 78 (3) ◽  
pp. 567-570 ◽  
Author(s):  
T. Inoue ◽  
H. Komatsu ◽  
M. Shimizu ◽  
S. Tsunekawa ◽  
H. Takei
Keyword(s):  
Solution Growth ◽  
Top Seeded Solution Growth

scholarly journals Effects of the Temperature Gradient Near the Crystal-Melt Interface in Top Seeded Solution Growth of SiC Crystal (Phys. Status Solidi A 20∕2018)

2018 ◽  
Vol 215 (20) ◽  
pp. 1870045
Author(s):  
Minh-Tan Ha ◽  
Yun-Ji Shin ◽  
Myung-Hyun Lee ◽  
Cheol-Jin Kim ◽  
Seong-Min Jeong
Keyword(s):  
Temperature Gradient ◽  
Solution Growth ◽  
Top Seeded Solution Growth

scholarly journals Relaxor-based ferroelectric single crystals grown by top-seeded solution growth method

2017 ◽  
Vol 47 (11) ◽  
pp. 1126-1138
Author(s):  
Chao HE ◽  
ZuJian WANG ◽  
XiaoMing YANG ◽  
XiFa LONG
Keyword(s):  
Single Crystals ◽  
Solution Growth ◽  
Growth Method ◽  
Top Seeded Solution Growth

Improvement of Surface Morphology by Solution Flow Control in Solution Growth of SiC on Off-Axis Seeds

2015 ◽  
Vol 821-823 ◽  
pp. 31-34 ◽  
Author(s):  
Tomonori Umezaki ◽  
Daiki Koike ◽  
S. Harada ◽  
Toru Ujihara
Keyword(s):  
Flow Direction ◽  
Seed Crystal ◽  
Solution Growth ◽  
Rotational Axis ◽  
Solution Flow ◽  
Step Flow ◽  
Unidirectional Flow ◽  
Novel Method ◽  
Set Up ◽  
Top Seeded Solution Growth

The solution growth of SiC on an off-axis seed is effective on the reduction of threading dislocations. We proposed a novel method to grow a SiC crystal on an off-axis seed by top-seeded solution growth (TSSG). In our previous study, a unidirectional solution flow above a seed crystal is effective to suppress surface roughness in the growth on the off-axis seed. However, it is difficult to apply the unidirectional flow in an axisymmetric TSSG set-up. In this study, the unidirectional flow could be achieved by shifting the rotational axis away from the center of the seed crystal. As a result, the smooth surface was obtained in the wider area where the solution flow direction was opposite to the step-flow direction.

scholarly journals Influence of Ta5+ content on the crystallographic structure and electrical properties of [001]PC-oriented (Li,Na,K)(Nb,Ta)O3 single crystals

CrystEngComm ◽  
2016 ◽  
Vol 18 (12) ◽  
pp. 2081-2088 ◽  
Author(s):  
Hairui Liu ◽  
Philippe Veber ◽  
Jurij Koruza ◽  
Daniel Rytz ◽  
Michael Josse ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Single Crystals ◽  
Perovskite Structure ◽  
Solution Growth ◽  
Lead Free ◽  
Crystallographic Structure ◽  
Growth Method ◽  
Top Seeded Solution Growth

A series of centimeter-sized lead-free piezoelectric Li+- and Ta5+-modified (Na,K)NbO3 single crystals with an ABO3 perovskite structure was successfully grown by the top-seeded solution growth method.

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