Effect of stirring on the growth rate anisotropy of the metastable α-glycine single crystals

2013 ◽  
Author(s):  
K. Renuka Devi ◽  
K. Srinivasan
Keyword(s):  
Growth Rate ◽  
Single Crystals ◽  
Growth Rate Anisotropy

Measurement of growth rates for single crystals and pressed tablets of CuSO4.5 H2O on a rotating disc

1989 ◽  
Vol 54 (11) ◽  
pp. 2951-2961 ◽  
Author(s):  
Miloslav Karel ◽  
Jaroslav Nývlt
Keyword(s):  
Growth Rate ◽  
Single Crystal ◽  
Single Crystals ◽  
Growth Rates ◽  
Diffusion Coefficients ◽  
Preferred Orientation ◽  
Rotating Disc ◽  
Dissolution Rates ◽  
Rates Of Growth ◽  
Good Agreement

Measured growth and dissolution rates of single crystals and tablets were used to calculate the overall linear rates of growth and dissolution of CuSO4.5 H2O crystals. The growth rate for the tablet is by 20% higher than that calculated for the single crystal. It has been concluded that this difference is due to a preferred orientation of crystal faces on the tablet surface. Calculated diffusion coefficients and thicknesses of the diffusion and hydrodynamic layers in the vicinity of the growing or dissolving crystal are in good agreement with published values.

Growth Rate Problems of KDP Type Single Crystals

1991 ◽  
pp. 123-134 ◽  
Author(s):  
V. I. Bespalov ◽  
V. I. Bredikhin ◽  
V. P. Ershov ◽  
V. I. Katsman ◽  
S. Yu. Potapenko
Keyword(s):  
Growth Rate ◽  
Single Crystals

scholarly journals Effect of Composition on the Growth of Single Crystals of (1−x)(Na1/2Bi1/2)TiO3-xSrTiO3 by Solid State Crystal Growth

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2357 ◽  
Author(s):  
Le ◽  
Fisher ◽  
Moon
Keyword(s):  
Growth Rate ◽  
Crystal Growth ◽  
Solid State ◽  
Single Crystal ◽  
Single Crystals ◽  
Grain Growth ◽  
Ceramic Powder ◽  
Single Crystal Growth ◽  
Crystal Growth Rate ◽  
Mixed Control

The (1−x)(Na1/2Bi1/2)TiO3-xSrTiO3 (NBT-100xST) system is a possible lead-free candidate for actuator applications because of its excellent strain vs. electric field behaviour. Use of single crystals instead of polycrystalline ceramics may lead to further improvement in piezoelectric properties but work on single crystal growth in this system is limited. In particular, the effect of composition on single crystal growth has yet to be studied. In this work, single crystals of (NBT-100xST) with x = 0.00, 0.05, 0.10 and 0.20 were grown using the method of Solid State Crystal Growth. [001]-oriented SrTiO3 single crystal seeds were embedded in (NBT-100xST) ceramic powder, which was then pressed to form pellets and sintered at 1200 °C for 5 min–50 h. Single crystal growth rate, matrix grain growth rate and sample microstructure were examined using scanning and transmission electron microscopy. The results indicate that the highest single crystal growth rate was obtained at x = 0.20. The mixed control theory of grain growth is used to explain the single crystal and matrix grain growth behaviour.

scholarly journals Electrical Phenomena accompanying the Phase Change of Dilute KCl Solutions into Single Crystals of Ice

1970 ◽  
Vol 9 (56) ◽  
pp. 269-277 ◽  
Author(s):  
T. E. Osterkamp ◽  
A. H. Weber
Keyword(s):  
Growth Rate ◽  
Liquid Phase ◽  
Phase Change ◽  
Distribution Coefficient ◽  
Single Crystals ◽  
Phase Distribution ◽  
Distribution Coefficients ◽  
Solute Distribution ◽  
Ice Crystals ◽  
Apparent Diffusion Coefficients

The Workman-Reynolds effect was investigated during the phase change of dilute (about 2 × 10-4 N) KCl solutions into single crystals of ice. The ice crystals were oriented with the c-axes either parallel or perpendicular to the growth direction. The solute distribution in the liquid phase. near the interface (within 10 mm), was obtained with a wire-type conductivity cell. For a crystal growth rate 8.8 μm/s the freezing potentials were + 10.0 V and + 6.0 V and the specific charge séparations were 1.3 ± 0 1 × 10-6 C/g of ice and 1 4 ± 0.1 × 10-6 C/g of ice for growth parallel and perpendicular. Respectively, to the c-axes of the ice crystals . The equilibrium solute distribution coefficient was found to be 4 × 10-3 for KCl solutions for both crystal orientations. An “apparent” (because of convection in the liquid phase) distribution coefficient ranged from 0.031- 0.074. The “apparent” diffusion coefficients ranged from 1.3–4.9 × 10-3 mm2/s and varied linearly with growth rate. The ionic distribution coefficients. K+ and K-, were approximately K+ - K- = - 2 × 10-5 and K+ + K - = 8 × 10-3 for the KCl solutions.

scholarly journals Topological traits of a cellular pattern versus growth rate anisotropy in radish roots

PROTOPLASMA ◽  
2019 ◽  
Vol 256 (4) ◽  
pp. 1037-1049 ◽  
Author(s):  
Anna Piekarska-Stachowiak ◽  
Joanna Szymanowska-Pułka ◽  
Izabela Potocka ◽  
Marcin Lipowczan
Keyword(s):  
Growth Rate ◽  
Cellular Pattern ◽  
Growth Rate Anisotropy ◽  
Pattern Versus

Growth Rate Analysis of Gibbsite Single Crystals Growing from Aqueous Sodium Aluminate Solutions

2004 ◽  
Vol 4 (1) ◽  
pp. 185-198 ◽  
Author(s):  
C. Sweegers ◽  
H. Meekes ◽  
W. J. P. van Enckevort ◽  
I. D. K. Hiralal ◽  
A. Rijkeboer
Keyword(s):  
Growth Rate ◽  
Single Crystals ◽  
Sodium Aluminate ◽  
Aqueous Sodium ◽  
Rate Analysis
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