نتایج جستجو برای: powders solid state reaction
تعداد نتایج: 1387945 فیلتر نتایج به سال:
This paper presents a new aqueous precipitation method to prepare silicon-substituted hydroxyapatites Ca10(PO4)6-y(SiO4)y(OH)2-y(VOH)y (SiHAs) and details the characterization of powders with varying Si content up to y=1.25molmolSiHA(-1). X-ray diffraction, transmission electron microscopy, solid-state nuclear magnetic resonance and Fourier transform infrared spectroscopy were used to accuratel...
In this research, solid state carbothermal synthesis of HfB2 Nano powders was investigated. For this purpose, HfO2,H3BO3, carbon active or phenolic resin were used as raw materials for carbothermal reaction. After 2-4 hours of milling the raw materials by a planetary ball in an ethanol media, the mixture was heat dried and pressed in to disks under pressure of 20-30 bar. The disks were then pla...
The simple fluorinated precursor, copper(II) trifluoroacetate, Cu(CF3COO)2 can be effectively utilised in the synthesis of copper(I) nitride, Cu3N, powders and films by combinations of wet processing and gas–solid (ammonolysis) techniques. The resulting materials were characterized by powder X-ray diffraction (PXD), scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (E...
Gasification slag is a solid waste generated by the coal chemical industry which has emerged in recent years. In this paper, effect of gasification (CGS) powder content on reaction kinetics, gel structure and compressive strength Portland cement was investigated for potential application CGS powders cementitious materials. The blended with analyzed using X-ray diffraction, Fourier transform inf...
Long-lasting phosphors, SrAl2O4: Eu, Dy and CaAl2O4: Nd, have been prepared by a short process using the spark plasma sintering method. The raw oxide powders were mixed for 5 min high-energy mill. Subsequently, solid-state reaction simultaneously performed approximately 20 apparatus. temperatures set to 1150–1500°C 1100–1400°C Nd. X-ray diffraction patterns showed that temperature of 1400°C or ...
The nanopowders of SnO2, CaSnO3 and Ca2SnO4 in the size rang of 5-70 nm have been prepared using solid-state reaction technique. The technique is convenient and inexpensive in comparison to the conventional routes of compound prepared and processing where, many steps of mixing and annealing are i...
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