Formation of photonic structures in Sm2+-doped aluminosilicate glasses through phase separation

2005 ◽  
Author(s):  
Koji Fujita ◽  
Shunsuke Murai ◽  
Kazuki Nakanishi ◽  
Kazuyuki Hirao
Keyword(s):  
Phase Separation ◽  
Photonic Structures ◽  
Aluminosilicate Glasses

Formation of photonic structures in Sm2+-doped aluminosilicate glasses through phase separation

2006 ◽  
Vol 352 (23-25) ◽  
pp. 2496-2500 ◽  
Author(s):  
Koji Fujita ◽  
Shunsuke Murai ◽  
Kazuki Nakanishi ◽  
Kazuyuki Hirao
Keyword(s):  
Phase Separation ◽  
Photonic Structures ◽  
Aluminosilicate Glasses

Formation of photonic structures in glasses through phase separation

2001 ◽  
Vol 117 (12) ◽  
pp. 733-737 ◽  
Author(s):  
A.A Lipovskii ◽  
V.D Petrikov ◽  
V.G Melehin ◽  
D.K Tagantsev ◽  
B.V Tatarintsev
Keyword(s):  
Phase Separation ◽  
Photonic Structures

Structural evolution and phase separation of CaO · Al2O3 · SiO2 glasses in an electric field

1999 ◽  
Vol 14 (11) ◽  
pp. 4421-4425
Author(s):  
W. Liu ◽  
X. M. Gu ◽  
Y. K. Zheng ◽  
K. M. Liang
Keyword(s):  
Phase Separation ◽  
Electric Field ◽  
Photoelectron Spectroscopy ◽  
Structural Evolution ◽  
Nucleating Agent ◽  
Static Electric Field ◽  
Spectra Analysis ◽  
Alkali Ions ◽  
Aluminosilicate Glasses ◽  
Calcium Aluminosilicate

In the present paper, the process of phase separation in calcium aluminosilicate glasses (CAS glasses) containing TiO2 as a nucleating agent is studied. A static electric field promotes the process of phase separation even when the time of heat treatment is short. The effect of electric field on phase separation acts through the higher polarizability of Ti ions. Alkali ions, when present, will diffuse toward the cathode, which may generate different micromorphology at the parts of samples near the cathode and the anode. X-ray photoelectron spectroscopy and Raman spectra analysis confirm the conclusion that the electric field has promoted phase separation in CAS glasses.

scholarly journals High transparent mid-infrared silicon “window” decorated with amorphous photonic structures fabricated by facile phase separation

2018 ◽  
Vol 26 (14) ◽  
pp. 18734
Author(s):  
Yafeng Zhang ◽  
Xinhua Hu ◽  
Shao-Wei Wang ◽  
Bo Zhang ◽  
Lei Shi ◽  
...  
Keyword(s):  
Phase Separation ◽  
Mid Infrared ◽  
Photonic Structures

Bulk standards for low-temperature biological x-ray microanalysis

1984 ◽  
Vol 42 ◽  
pp. 282-283
Author(s):  
P. Echlin ◽  
M. McKoon ◽  
E.S. Taylor ◽  
C.E. Thomas ◽  
K.L. Maloney ◽  
...  
Keyword(s):  
Phase Separation ◽  
Low Temperature ◽  
Analytical Method ◽  
Salt Solutions ◽  
Absolute Concentration ◽  
Cooling Process ◽  
X Ray ◽  
The Absolute ◽  
Analytical Procedures ◽  
Electrical Conductors

Although sections of frozen salt solutions have been used as standards for x-ray microanalysis, such solutions are less useful when analysed in the bulk form. They are poor thermal and electrical conductors and severe phase separation occurs during the cooling process. Following a suggestion by Whitecross et al we have made up a series of salt solutions containing a small amount of graphite to improve the sample conductivity. In addition, we have incorporated a polymer to ensure the formation of microcrystalline ice and a consequent homogenity of salt dispersion within the frozen matrix. The mixtures have been used to standardize the analytical procedures applied to frozen hydrated bulk specimens based on the peak/background analytical method and to measure the absolute concentration of elements in developing roots.

Phase separation in sol gel-derived ceramic films of silica-zirconia, alumina-zirconia, and titania-zirconia system

1994 ◽  
Vol 52 ◽  
pp. 646-647
Author(s):  
J. Tong ◽  
L. Eyring
Keyword(s):  
Fracture Toughness ◽  
Phase Separation ◽  
Sol Gel ◽  
Great Influence ◽  
High Strength ◽  
Chemical Durability ◽  
Separation Method ◽  
Toughening Mechanism ◽  
Ceramic Films ◽  
Zirconia Toughened Alumina

There is increasing interest in composites containing zirconia because of their high strength, fracture toughness, and its great influence on the chemical durability in glass. For the zirconia-silica system, monolithic glasses, fibers and coatings have been obtained. There is currently a great interest in designing zirconia-toughened alumina including exploration of the processing methods and the toughening mechanism.The possibility of forming nanocrystal composites by a phase separation method has been investigated in three systems: zirconia-alumina, zirconia-silica and zirconia-titania using HREM. The morphological observations initially suggest that the formation of nanocrystal composites by a phase separation method is possible in the zirconia-alumina and zirconia-silica systems, but impossible in the zirconia-titania system. The separation-produced grain size in silica-zirconia system is around 5 nm and is more uniform than that in the alumina-zirconia system in which the sizes of the small polyhedron grains are around 10 nm. In the titania-zirconia system, there is no obvious separation as was observed in die alumina-zirconia and silica-zirconia system.

Phase separation in fluid additive hard sphere mixtures?

1998 ◽  
Vol 95 (2) ◽  
pp. 131-135 ◽  
Author(s):  
DOUGLAS HENDERSON DEZSO BODA KWONG-YU CHAN
Keyword(s):  
Phase Separation ◽  
Hard Sphere
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