Aluminas combustion synthesis

A recent comparative investigation of the NO + CO reaction shows a significant rate enhancement in the formation of N2 on Ce0.98Pda02O2 8 prepared via a combustion synthesis method in comparison with conventional Pd-based catalysts supported on alumina... 

Kazakov AI, Rubtsov Yul, Lempert DB, Manelis GB (2003) Kinetics of oxidation of organic acids by ammonium nitrate. Russ J Appl Chem 76 1214-1220 Behera SK, Barpanda R Prathar SK, Bhattacharyya S (2004) Synthesis of magnesium-aluminium spinel from autoignition of citrate-nitrate gel. Mater Lett 58 1451-1455 Chandradass J, Kim K, Ki H (2004) Effect of activity on the citrate-nitrate combustion synthesis of alumina-zirconia composite powder. Metals Mater Int 15 2039-2043 Purohit RD, Saha S, Tyagi AK (2006) Nanocrystalline ceria powders through citrate-nitrate combustion. J Nanosci Nanotech 6 209-214... 

Biamino, S., Fino, P., Pavese, M. and Badini, C. (2005) Alumina-zirconia-yttria nanocomposites prepared by solution combustion synthesis. Ceramics International, 32, 509-13. 

BH Rabin, GE Korth, RL Williamson. Fabrication of titanium carbide-alumina composities by combustion synthesis and subsequent dynamic consolidation. J Am Ceram Soc 73 2156, 1990. 

Feng, H. J., Moore, J. J., Wirth, D. G. (1992). Combustion Synthesis of Ceramic-Metal Composite Materials The Zirconium Diboride-Alumina-Aluminum System. International Journal of Self-Propagating High-Temperature Synthesis, 1,228-238. 

The apparatus employed in the synthesis is shown in Fig. 3. The combustion tube (24 in. long and 1 - in. o.d-) is made of fused quartz and the sample boats (3 in. long, i in. wide, and in. deep) are of high-purity alumina. Pure gallium(III) oxide (1.5057 g. 0.00803 mol), obtained... 

Toniolo JC, Lima MD, Takimi AS, Bergmann CP (2005) Synthesis of alumina powders by the glycine-nitrate combustion process. Mater Res Bull 40 561—571... 

An emulsion combustion method was developed by Tani et al. [172] for synthesis of alumina and other oxides. The method consists of three steps (i) atomization of a W/O emulsion, (ii) firing the oil phase in the atomized emulsion (SOO C), and (iii) oxidation of the precursors into the metal oxide. In the specific example of aluminum oxide (see BaTiOj for another example), the oil phase was kerosene and the aqueous phase, a solution of Al-nitrate. The surfactants were SUNSOFT 818H, hexa(2-hydroxy-l,3-propyleneglycol)diricinoleate and NP-6, hexaethyleneglycol nonyl phenyl ether. The three components were varied in ratio... 

The formation of open and porous structures with extremely large surface area is of high technological significance, because this structure type is very suitable for electrodes in many electrochemical devices, such as fuel cells, batteries and sensors [1,2], and in catalysis applications [3]. The template-directed synthesis method is most commonly used for the preparation of such electrodes. This method is based on a deposition of desired materials in interstitial spaces of disposable hard template. When interstitial spaces of template are filled by deposited material, the template is removed by combustion or etching, and then the deposited material with the replica structure of the template is obtained [4, 5]. The most often used hard templates are porous polycarbonate membranes [6, 7], anodic alumina membrane [8-10], colloidal crystals [11, 12], echinoid skeletal stractures [13], and polystyrene spheres [14, 15]. 

In the case of the synthesis of alumina, chrome, nickel, iron and nanocrystalline cobalt oxides using the solution combustion technique, for example, we lack, so far, a deep understanding of the influence of the fuel-oxidant ratios well as a model of the thermodynamic variables associated with enthalpy, adiabatic flame temperature and the total number of moles of gas generated related to the powder characteristics, such as crystallite size and surface area. 

Kingsley, J.J., Patil, K.C. A novel combustion process for the synthesis of fine particle a-alumina and related oxide materials. Mater. Lett. 6,427-432 (1988)... 

---