Pretraživanje
Prikaz rezultata 1-10 od 11
Synthesis of Si3N4-celsian composite materials
(Ceramics International, 2000)
The synthesis of Si3N4-celsian composite materials was studied in this paper. To obtain celsian, two different types of additives were used. In the first case the appropriate mixture of BaCO3, Al2O3 and SiO2 was added to ...
Crystal structure of Ce-doped CaMnO3 perovskite
(Ceramics International, 2009)
The synthesis and crystal structure of Ce-doped CaMnO3 perovskite has been investigated. Two powders with nominal compositions Ca0.5Ce0.5MnO3 and CaMn0.5Ce0.5O3 were prepared using a modified glycine/nitrate procedure. The ...
Behavior of silicon carbide/cordierite composite material after cyclic thermal shock
(Ceramics International, 2009)
In the present work Mg-exchanged zeolite and silicon carbide were used as starting materials for obtaining cordierite/SiC composite ceramics with weight ratio 30:70. Samples were exposed to the water quench test from 950 ...
Stability of alumina suspensions in the presence of Tiron
(Ceramics International, 2008)
The stability of alumina suspensions in the presence of Tiron was studied and discussed in the light of surface properties of alumina powder used, ionization chemistry of Tiron, and sedimentation behavior of the suspensions. ...
Modified glycine nitrate procedure (MGNP) for the synthesis of SOFC nanopowders
(Ceramics International, 2007)
Nanopowders with perovskite type crystal structure were synthesized by modified glycine nitrate procedure. Modification of the procedure was performed by partial replacement of nitrates by acetates, in order to control the ...
Chemical reduction of nanocrystalline CeO2
(Ceramics International, 2009)
The reduction of commercial and mechanochemically processed CeO2 powders was studied. Nanostructured CeO2, with the crystallite size of 21 nm and the lattice distortion of 0.37%, was obtained during 60 min of milling in a ...
Effect of beta-Si3N4 seeds on densification and fracture toughness of silicon nitride
(Ceramics International, 2006)
Composite materials based on Si3N4 were synthesized by introducing previously prepared beta-Si3N4 seeds into a mixture of alpha-Si3N4 and 10 wt% of sintering additive. The densification process during pressureless sintering ...
Thermal shock damage characterization of refractory composites
(Ceramics International, 2008)
The possibility of using dolomite and bauxite for synthesis of high temperature castable was studied. Behavior of the material in conditions of rapid temperature changes was investigated. Water quench test was applied to ...
Doped and Co-doped CeO2: Preparation and properties
(Ceramics International, 2008)
Glycine/nitrate method was modified and applied to synthesize ceria solid solutions doped with rare earth cations and yttrium (Gd, Sm, Nd, Y) in the concentration range 0 LT = x LT = 0.25. The modification of glycine nitrate ...
Optimal thermal plasma processes for zirconium carbide powder production from zircon concentrates
(Ceramics International, 2001)
Available results of equilibrium composition and total enthalpy computation for the systems: Zr-Si-O-Ar and Zr-Si-O-C-H-Ar? presented in the paper, enables thermodynamic optimization of the plasma process for zirconium ...