Journal of Materials Synthesis and Processing
SCOPUS (1994-2002)
1573-4870
1064-7562
Cơ quản chủ quản: N/A
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Mechanochemical Synthesis of Double Hydroxides
Tập 8 - Trang 251-253 - 2000
It has been demonstrated that the formation of magnesium-aluminium double
hydroxides [Mg(1 − X)Al X (OH)2] X+(A n− X/n ) • m H2O, (A–Cl−, NO− 3, SO2− 4)
occurs during mechanical activation of the mixture of magnesium hydroxide
(brucite) with aluminium chloride, nitrate and sulphate in high-energy
planetary-type activators. The effect of activation time on the formation of the
double hydroxide has ...
Conversion of the Echinoderm Mellita eduardobarrosoi Calcite Skeleton into Porous Hydroxyapatite by Treatment with Phosphated Boiling Solutions
Tập 7 - Trang 211-219 - 1999
The influence of the boiling solution technique (a nonhydrothermal wet
treatment) in the formation of hydroxyapatite (HA) from a novel source, an
echinoderm known as Mellita eduardobarrosoi, whose skeleton contains calcite as
an inorganic constituent, was investigated. The experimental plan explores the
conversion using a batch boiling system composed of KH2PO4 + KOH aqueous
solutions at initial p...
MSR Reduction of Hexachlorobenzene
Tập 8 - Trang 295-300 - 2000
This paper deals with the mechanochemical degradation of hexachlorobenzene over
Li, Na, K, Mg, Ca, Ba, Ti, and W. Apart from the mixtures containing Ti and W,
the other systems react in a combustive mode leading to the chlorides and the
carbides of the inorganic substrates. Reaction stoichiometries and heats were
experimentally determined. The activation time required to ignite the reaction
decrea...
Combustion Synthesis of Glass (B2O3-Al2O3-MgO)-Ceramic (TiB2) Composites
Tập 10 - Trang 163-174 - 2002
The combustion synthesis, or self-propagating high temperature synthesis (SHS),
technique has been used to produce glass ceramic composites that have a glass
matrix based on B2O3-MgO-Al2O3and a crystalline ceramic phase of TiB2.
Conditions for producing glassy materials by the SHS technique are discussed and
the thermodynamics of these combustion reactions are analyzed. The combustion
characterist...
Chemical Durability of Waste Fluorescent Glass and Shell–Derived Glass-Ceramics
Tập 10 - Trang 37-42 - 2002
In order to obtain glass-ceramics reinforced by β-wollastonite, pressed
specimens prepared by powdered waste fluorescent glass and refuse shell dumped
in the seashore were heat-treated at 800°C, 900°C, and 1000°C. Chemical
stability of the heat-treated specimens was analyzed by weight changes and by
observation of surface morphology and composition, by field-emission scanning
electron microscopy a...
Computer Modeling of the Evolution of Dendrite Microstructure in Binary Alloys During Non-isothermal Solidification
Tập 10 - Trang 191-203 - 2002
Two-dimensional simulations of the evolution of dendrite microstructure during
isothermal and non-isothermal solidifications of a Ni-0.41Cu binary alloy are
carried out using the phase-field method. The governing evolution equation for
the phase field variable, the solute mole fraction and the temperature are
formulated and numerically solved using an explicit finite difference scheme. To
make the...
Reaction Bonding of Three-Layer Alumina-Based Composites
Tập 7 - Trang 195-203 - 1999
Three-layer alumina-based composites with Al2O3-containing mullite as the outer
layer and ZrO2-containing alumina as the inner layer were fabricated by
die-pressing and reaction bonding. The effects of the outer-layer compositions
on the densification behavior of three-layer composites were investigated. The
existence of residual stresses in the layers was verified using indentation
methods. Compa...
Effect of Sol-Gel Processing Parameters on Optical Properties of TMOS Silica Aerogels
Tập 6 - Trang 37-48 - 1998
To optimize and produce silica aerogels with high direct transmittance and low
diffusive values, systematic and detailed experiments were carried out on the
effect of sol-gel processing parameters on optical properties of silica
aerogels. A series of aerogel samples of different molar ratio combinations was
optically examined in the UV–visible–NIR range by a spectrophotometer equipped
with an inte...
Preparation of Nanocrystalline Calcium Aluminate Powders
Tập 10 - Trang 157-161 - 2002
Nanocrystalline calcium aluminate (CaAl2O4and Ca3Al2O6) powders have been
prepared by pyrolysis of complex compound of aluminium and calcium with
triethanolamine (TEA). The soluble metal ion-TEA complex forms the precursor
material on complete dehydration of the mixtures of the complex of calcium-TEA
and aluminium-TEA. The single-phase CaAl2O4and Ca3Al2O6powders have resulted
after heat treatment ...
Mechanochemical Transformations in Mixtures of the Silicate Phases of Granite
Tập 8 - Trang 259-263 - 2000
The effect of mechanical treatment of different degrees of action on the changes
in the composition of silicate phases of natural granite is studied.
Mechanochemical treatment is demonstrated to cause disordering of silicate
structures. Layered hydrosilicates are most easily destroyed, which is explained
by their dehydration. This destruction is accompanied by the formation and
crystallization of ...