Results 221 to 230 of about 41,527 (247)

Hydrothermal Synthesis of Crystals

Chemical & Engineering News Archive, 1987
During 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...
openaire   +1 more source

Hydrothermal synthesis of zeolites

Current Opinion in Solid State and Materials Science, 1998
Recent 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
openaire   +1 more source

Hydrothermal Zeolite Synthesis

1989
The diversity of structure among the zeolite frameworks surpasses that of other three-dimensional networks with 60 different topologies and numerous variations within a given topology. The number of possible novel zeolites thus is great. Today, over 150 zeolite structures have been synthesized, some of them counterparts to the naturally occurring ...
openaire   +1 more source

Hydrothermal Synthesis Under Pressure

2003
The hydrothermal synthesis method under high pressure is able to simulate the natural synthesis conditions and to “reconstruct” natural zeolites, but also to provide a way to obtain substituted zeolites, e.g. by transition metal ions, where only very few cases are known in nature (e.g. zeolite VSV-Gaultite).
Habbib Ghobarkar, Oliver Schäf, Yvan Massiani, Philippe Knauth   +3 more
openaire   +1 more source

Hydrothermal Synthesis of Brookite

Chemistry Letters, 1999
Abstract 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, Takeo Ebina, Takashi Iwasaki, Hiromichi Hayashi, Yoshio Onodera, Maya Chatterjee   +5 more
openaire   +1 more source

Hydrothermal Synthesis of Tabular Perovskite Particles

Key Engineering Materials, 2001
Phase 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, Anderson, J, Messing, G. L., Adair, JH   +3 more
openaire   +2 more sources

Hydrothermal Synthesis of Bismuth Titanate Powders

Journal of the American Ceramic Society, 2003
Bismuth titanate was synthesized under hydrothermal conditions from an amorphous bismuth–titanium precursor gel. The gel was formed by mixing a bismuth acetate complex with titanium butoxide and then adding the solution dropwise into 6 M NaOH.
Huiwen Xu, Keith J. Bowman, Elliott B. Slamovich   +2 more
openaire   +1 more source

Hydrothermal Synthesis of Nanofibrous Bismuth Vanadate

Chemistry Letters, 2005
Abstract Bismuth vanadate (BiVO4) nanofibrous arrays were synthesized by a hydrothermal route. Fibrous structure with the average diameter of 100 nm and length of up to several micrometers was fabricated by the hydrothermal process at 160 °C for 48 h under the assistance of a cationic surfactant, cetyltrimethylammonium bromide (CTAB ...
Jianqiang Yu, Akihiko Kudo
openaire   +1 more source

Hydrothermal synthesis of gallium orthophosphate crystals

Journal of Crystal Growth, 1986
Some orthophosphates are known to have polymorphism similar to SiO2. The low temperature form of gallium phosphate, GapO4, is especially attractive due to its electrical character superior to α-quartz. In the present work, single crystals of GaPO4 have been grown hydrothermally at temperatures below 400 °C in phosphoric acid solution. Highly pure GaPO4
Shin-ichi Hirano, Kazuo Miwa, Shigeharu Naka   +2 more
openaire   +1 more source

Hydrothermal Synthesis of Ytterbium Silicate Nanoparticles

Inorganic Chemistry, 2010
A simple, low-cost hydrothermal method was developed to synthesize 20-nm-diameter single-crystalline ytterbium silicate (Yb(2)Si(2)O(7) and Yb(2)SiO(5)) nanoparticles at 200 degrees C. This is nearly 1000 degrees C lower than that for the typical sol-gel route to ytterbium silicate powders.
Hongfei, Chen, Yanfeng, Gao, Yun, Liu, Hongjie, Luo   +3 more
openaire   +2 more sources