Solution combustionsynthesismethod is a simple method to synthesize metal oxides at low temperature . Due to the ionic level’s mixture of the raw materials in solution, doping could be easily carried out. In this paper, we introduced a modified low temperature solution combustionsynthesismethod to prepare Al and Mg doped LiNi 0.5 Mn 1.5 O 4 . Based on the optimization of the
combustion syntheses method at temperature of 550° C. This method is one of the best method because it is relatively simple, efficient,low cost and time consuming method. The scope of this work is to analyze crystalline nature, spectrum and atomic percentage of sample. The present results prove that the combustion technique using MgO:Dy 3+ can produce the materials
Figure 6 shows the TL glow curve of aluminium oxide doped with 3.0 mol% germanium after being irradiated to Cobalt-60 gamma rays at dose ranging from 10Gy to 80 Gy. The glow curves recorded for all doses delivered the glow peak falls at around 175 °C and 230°C. The figure also indicates the TL intensity increase as the delivered dose increase. This results also agrees when - Al 2 O 3 doped either with Tb 3+ or Tm 3+ was prepared by combustionsynthesis techniques
doped with impurities that induce many different types of trapping centers at which charged particles produce ionizing radiation . Since then, there are a lot of efforts have been directed towards the improvements on its sensitivity via various dopants such as Si, Ti, , Mg and Y , Cr and Ni . Study by Ravichandran., (2014)  of undoped and (2-10mol%) Al doped ZrO 2 nano powder were synthesized using solution combustion
0.5:0.5:0.75:0.75:0.25:0.25 were firstly dissolved in 10 ml distilled water to obtain a solution. The solution was then put into a muffle furnace which presets at 800 ˚C and then ignited and combusted for 10 minutes. After that, for SC-LNMO, the furnace was stopped heating and then the sample was cooled in the furnace to room temperature naturally. For FC-LNMO, the sample was taken out from the furnace immediately after combustion and then cooled down to room temperature in air.
The lattice parameters increases with starch additive, because of the increased amount of starch, additional heat can be released during the combustion of starch, and improved system temperature. Mn ions are present in the Mn 4+ state due to the more stability of Mn 4+ at low temperature , so,the radius of Mn 4+ (0.60 Å) is smaller than Mn 3+ (0.68 Å) , result in declined values of lattice parameters.
Zinc Oxide (ZnO) is a wide band gap semiconductor with wurtzite structure. The physical and chemical prop- erties of nano-scale particles are different when com- pared with the bulk materials. Nano powders controlled to nanocrystalline size can show atom-like behavior which results from higher surface energy. It is due to the large surface area and wider band gap between the con- duction and valence band . There is always a need for the improvement of the synthesis of ZnO for the Indus- trial needs with less time and less expensive. Alternate method was proposed by various people Park et al. pro- posed and reported a novel solution combustionmethod (SCM) . Noori et al.  obtained ZnO powder with 30 nm size combustionmethod using zinc nitrate, urea, gly- cine and citric acid at neutral pH and calcination at 500˚C. This zinc oxide powder is widely used in the various applications such as coatings for papers, oint- ments, and cream lotions to protect against sunburn. Zinc Oxide is used in the functional devices, catalysts, pig- ments, optical material and other important applications. Therefore in the present paper ZnO nano crystallites synthesis follows a novel solution combustionsynthesismethod with surfactant assistance and its structural, op-
The aluminum oxide materials are widely used in ceramics, refractories and abrasives due to their hardness, chemical inertness, high melting point, non-volatility and resistance to oxidation and corrosion. The paper describes work done on synthesis of α-alumina by using the simple, non-expensive solution combustionmethod using glycine as fuel. Aluminum oxide (Al 2 O 3) nanoparticles were
outside. A small amount of MgO peaks appeared in both intermediate and out- side parts. Combined with the temperature history shown in Figure 2, due to the high temperature at central part, Mg evaporated over 1091˚C. The Mg vapor diffused from center to outside of the sample. In addition, a heavy odor was smelled when the CS equipment was opened. Combining the above phenomena, when the combustionsynthesis reaction is ignited, the target product MgSiN 2 is
However, it seems that there is still great room for im- provement in the former methods from viewpoints of proc- essing time and cost. Therefore, in this study, we propose a more simple and inexpensive production method for the production of hard ceramic particle dispersed FeAl alloys based on the combustionsynthesis or the Self-propagating High-temperature Synthesis (SHS) 4) from elementary pow-
Fig.9 shows the FTIR spectra of the synthesized nanomaterials via a combustionmethod at different conditions. The FTIR spectra of the synthesized nanomaterial annealed at 600 and 1000 ˚C is shown in fig. 9. The peaks at 1625- 1650 cm -1 are assigned to the bending vibrations of hydroxide. The weak peak at 1508 and 2340 cm -
ABSTRACT: In the present study, a facile, cost effective, synthetic route low temperature solution combustionsynthesis was introduced to prepare Magnesium oxide (MgO) nano particles and chemical oxidative polymerization method to synthesize PAni / MgO Nano Composites. Further these nano composites were characterized by PXRD, FESEM and EDAX to investigate their structural and morphological studies. As a part of electrical studies, dielectric constant and AC conductivity measurements were done by AC6500B precision impedance analyser.
mixture was ignited and a molten mixture of YAG and Ni was then generated. Solidiﬁcation of the pure YAG melt was realized under ultra-high-gravity ﬁelds due to the diﬀerent densities of YAG and Ni melts, and the maximum relative density of a YAG ceramic ingot reached 99.30%. The range of the grain size distribution was 30–50 mm, and the polished as-fabricated ceramic sample was translucent. However, due to the lack of suﬃcient microstructural detail regarding the fabricated samples, information pertaining to microstructural evolution during the combustionsynthesis process remains unclear.
The characterization data for all the BN samples showed that there is no any significant change in the phase composition of the product for all the reactant system. From the above results, we have concluded that glycine played a vital role in the formation of boron nitride. When borax was heated at high temperature in the presence of glycine, combustion reaction takes place and due to that exothermic reaction, borax decomposed into B 2 O 3 28 . Subsequently it reacts with nitrogen to
structure are successfully synthesized by combustionmethod using glycine as a fuel. The structure, morphology and photoluminescent properties of materials have been characterized by X-ray diffraction, scanning electron microscopy and fluorescence spectrometry. The XRD results indicate that crystals of CaZrO 3 :Tb 3+ belongs to
After the synthesis process, the samples were firstly allowed to cool and then removed from the furnace. Phase identification and crystallite size determination of both milled powders and synthesized products were made by using XRD analysis (mod.PW1830, Philips Analytical B.V, the Netherland) with Cu Kα radiation and Ni filter. The analysis of green powders and synthesized samples was performed in diffraction angle (2θ) range 0-80 o with scan step and scan time of 0.01 o
suitable method that involve in this project is using the citrate-nitrate auto combustion reaction. One of the benefits of this technique were the materials have improved the limitation of stoichiometry. Next, the final oxide results of crystalline dimensions are invariably in the nanometer range which having high contact of surface area. Characterisation of the Na x CoO 2 materials is test in variable type of characterisation
diffusion of metal ions, which may result in inhomogeneity, a larger particle size and longer calcination times . Our research group has investigated the influence of various fuels on solid-state combustionsynthesis. These fuels include glucose  and citric acid . Experimental results show that different fuels can greatly affect the particle morphology and electrochemical performance of the products. The micro-morphology of samples prepared using an acid fuel is mainly a spherical-like particle while the micro-morphology of specimens prepared using glucose is a lump. In this research, spinel LiMn 2 O 4 with Fd3m space group was rapidly prepared by solid-state combustionsynthesis
can measure the distortion from the inversion symmetry of the Eu 3+ ion local environment . Generally, phosphor having luminescence properties are strongly affected by concentration of rare earths materials. It is seems that in different type of synthesismethod.