Results 241 to 250 of about 2,624,596 (293)
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Journal of the American Ceramic Society, 1953
The underlying theory of hydrothermal synthesis is presented and the apparatus used is described. By way of illustration the determination of the solubility of quartz in superheated steam at high pressures and the determination of the compositions of coexisting gas and liquid phases in the system H 2
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The underlying theory of hydrothermal synthesis is presented and the apparatus used is described. By way of illustration the determination of the solubility of quartz in superheated steam at high pressures and the determination of the compositions of coexisting gas and liquid phases in the system H 2
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Hydrothermal synthesis of K4Nb6O17
Journal of Materials Science, 1998A new approach for the synthesis of K4Nb6O17.3H2O by hydrothermal method was examined using different alkaline solutions such as Nb2O5-KOH-NaOH-H2O, Nb2O5-KOH-NH4OH-H2O and Nb2O5-KOH-H2O. K4Nb6O17.3H2O was formed as single phase in Nb2O5-KOH-H2O system in the region of KOH concentration 1.0-1.5 m and temperature 220-285°C.
Satoshi Uchida +3 more
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Hydrothermal synthesis of magadiite
Applied Clay Science, 2006Abstract Intercalation of organic guest species into layered silicates is a way to construct clay mineral–polymer nanocomposites. An example is magadiite Na 2 Si 14 O 29 ·9H 2 O which like smectites intercalates organic species. Using hydrous silica precipitated from water glass with dilute HCl in aqueous dispersions of NaOH and Na 2 CO 3 , well ...
Yuh-Ruey Wang +2 more
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Hydrothermal synthesis of chalcopyrite
Economic Geology, 1966Natural chalcopyrite was dissolved by NaCl solution at the warmer end of a reaction vessel and synthetic chalcopyrite was precipitated at the cooler end at temperatures of 400 degrees -500 degrees C. No transfer occurred with pure water.
W. M. Barnard, P. A. Christopher
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Hydrothermal Synthesis of Brookite
Chemistry Letters, 1999Abstract Hydrothermal synthesis of brookite was performed at 110-200 °C within 24 h using amorphous TiO2 and sodium salts as the starting material. Brookite was obtained as an almost single phase at 200 °C and TiO2 / NaOH mole ratio ≅ 1.
Takako Nagase +5 more
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Hydrothermal synthesis of zeolites
Current Opinion in Solid State and Materials Science, 1998Recent developments have included the synthesis of new, large pore zeolite structures, zeotypes and metal substituted zeolites, along with the in situ investigation of zeolite synthesis and control of morphologies. In terms of new zeolite structures there is increasing realisation of the aim to specifically design templates to control zeolite ...
Mark T Weller, Sandra E Dann
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Hydrothermal Synthesis of Crystals
Chemical & Engineering News Archive, 1987During the past two decades, the needs of the electronics industry for such recalcitrant materials as single crystals has sparked research on methods for preparing those crystals, including even ge...
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Hydrothermal Synthesis and Biocompatibility of Hydroxyapatite Nanorods
Journal of Nanoscience and Nanotechnology, 2011A facile micelle precursor having cyclohexane/ethanol/cetyl trimethyl ammonium bromide/aqueous phase was treated hydrothermally to form nanohydroxyapatite. The synthesized products were characterized by means of X-ray diffraction, thermogravimetric analysis, transmission electron microscopy and energy-dispersive X-ray spectroscopy.
Kai, Li, Sie Chin, Tjong
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Combinatorial Approach to the Hydrothermal Synthesis of Zeolites
Angewandte Chemie International Edition, 1998One hundred or more solid-state syntheses can be conducted in parallel and employed for the combinatorial hydrothermal syntheses of zeolites by using a novel multiautoclave design. The operation of the multiautoclave was ascertained by the reinvestigation of the complete Na2 O-Al2 O3 -SiO2 ternary system in a single experiment.
Duncan E, Akporiaye +3 more
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Hydrothermal Synthesis of Tabular Perovskite Particles
Key Engineering Materials, 2001Phase pure perovskite lead titanate and lead zirconate titanate powders were produced by hydrothermal synthesis. Reaction temperature and time are critical processing parameters for formation of phase-pure perovskite particles. In addition, solution pH should be greater than 14 to produce well-crystallized lead-based perovskite particles. Particle size
Suvacı, Ender +3 more
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