Hydrothermal Synthesis of Lithium Zinc Phosphates: Structural Investigation of Twinned α-Li4Zn(PO4)2 and a High Temperature Polymorph β-Li4Zn(PO4)2

2002 ◽  
Vol 166 (2) ◽  
pp. 341-351 ◽  
Author(s):  
T.R. Jensen ◽  
R.G. Hazell ◽  
A. Nørlund Christensen ◽  
J.C. Hanson
Keyword(s):  
High Temperature ◽  
Hydrothermal Synthesis ◽  
Structural Investigation ◽  
Zinc Phosphates ◽  
High Temperature Polymorph

High-temperature in situ structural investigation on lead feldspar

1999 ◽  
Vol 84 (1-2) ◽  
pp. 120-129 ◽  
Author(s):  
Piera Benna ◽  
Mario Tribaudino ◽  
Emiliano Bruno
Keyword(s):  
High Temperature ◽  
Structural Investigation

Structural investigation of Li2O–B2O3–MoO3glasses and high-temperature solutions: toward understanding the mechanism of flux-induced growth of lithium triborate crystal

CrystEngComm ◽  
2013 ◽  
Vol 15 (2) ◽  
pp. 356-364 ◽  
Author(s):  
Di Wang ◽  
Ji Zhang ◽  
Deming Zhang ◽  
Songming Wan ◽  
Qingli Zhang ◽  
...  
Keyword(s):  
High Temperature ◽  
Structural Investigation ◽  
Lithium Triborate

scholarly journals New insights into high temperature hydrothermal synthesis in the preparation of visible-light active, ordered mesoporous SiO2–TiO2 composited photocatalysts

RSC Advances ◽  
2017 ◽  
Vol 7 (32) ◽  
pp. 19557-19564 ◽  
Author(s):  
Qin Wu ◽  
Chen Liu ◽  
Jinjun Peng ◽  
Fujian Liu
Keyword(s):  
High Temperature ◽  
Hydrothermal Synthesis ◽  
Visible Light ◽  
Carbon Doped ◽  
Ordered Mesoporous ◽  
Visible Light Active ◽  
One Step ◽  
Mesoporous Sio2

Carbon doped, visible light active and ordered mesoporous TiO2–SiO2 nanocomposites have been successfully synthesized via one step high temperature (180 °C) hydrothermal technology.

scholarly journals Crystallization kinetics of BaO–Al2O3–SiO2 glasses

1989 ◽  
Vol 4 (5) ◽  
pp. 1257-1265 ◽  
Author(s):  
Narottam P. Bansal ◽  
Mark J. Hyatt
Keyword(s):  
High Temperature ◽  
Ceramic Composites ◽  
X Ray Diffraction ◽  
Aluminosilicate Glasses ◽  
Structural Applications ◽  
Barium Aluminosilicate ◽  
Kinetics Of ◽  
High Temperature Polymorph ◽  
Large Volume Change ◽  
Glass Compositions

Barium aluminosilicate glasses are being investigated as matrix materials in high-temperature ceramic composites for structural applications. Kinetics of crystallization of two refractory glass compositions in the barium aluminosilicate system have been studied by differential thermal analysis (DTA), x-ray diffraction (XRD), and scanning electron microscopy (SEM). From variable heating rate DTA, the crystallization activation energies for glass compositions (wt. %) 10BaO–38Al2O3–51SiO2–1MoO3 (glass A) and 39BaO–25Al2O3–35SiO2–1MoO3 (glass B) were determined to be 553 and 558 kJ/mol, respectively. On thermal treatment, the crystalline phases in glasses A and B were identified as mullite (3Al2O3 · 2SiO2) and hexacelsian (BaO · Al2O3 · 2SiO2), respectively. Hexacelsian is a high-temperature polymorph which is metastable below 1590 °C. It undergoes structural transformation into the orthorhombic form at ∼300 °C accompanied by a large volume change which is undesirable for structural applications. A process needs to be developed where stable monoclinic celsian, rather than hexacelsian, precipitates out as the crystal phase in glass B.

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