Redox Effects in Self-Sustainiing Combustion Synthesis of Oxide Ceramic Powders

1991 ◽  
Vol 249 ◽  
Author(s):  
L.A. Chick ◽  
G.D. Maupin ◽  
G.L. Graff ◽  
L.R. Pederson ◽  
D.E. Mccready ◽  
...  

ABSTRACTThe glycine/nitrate process (GNP) is a combustion synthesis method that is particularly useful for synthesizing ultra-fine, multi-component oxide powders. During the self-sustaining combustion, the precursor solution is rapidly converted into an oxide product with glycine serving as the fuel and nitrates providing the oxidant. This paper examines the effects of altering the fuel/oxidant ratio on the characteristics of the product. Examples discussed include La(Sr)CrO3 and La(Sr)FeO3 perovskites and NiO.

1990 ◽  
Vol 10 (1-2) ◽  
pp. 6-12 ◽  
Author(s):  
L.A. Chick ◽  
L.R. Pederson ◽  
G.D. Maupin ◽  
J.L. Bates ◽  
L.E. Thomas ◽  
...  

2004 ◽  
Vol 111 (1) ◽  
pp. 49-56 ◽  
Author(s):  
Chyi-Ching Hwang ◽  
Tsung-Yung Wu ◽  
Jun Wan ◽  
Jih-Sheng Tsai

1995 ◽  
Vol 10 (3) ◽  
pp. 748-755 ◽  
Author(s):  
K.R. Venkatachari ◽  
Dai Huang ◽  
Steven P. Ostrander ◽  
Walter A. Schulze ◽  
Gregory C. Stangle

Materials with nanocrystalline features are expected to have improved or unique properties when compared to those of conventional materials. Methods for the practical and economical production of nanoparticles in large quantities are not presently available. A method based on combustion synthesis for preparing nanocrystalline powders was investigated in this work. Yttria-doped zirconia powders with an average crystallite size of 10 nm were synthesized. The characteristics of the powder (e.g., surface area and phase content) were found to depend strongly on the fuel content in the starting mixture and on the ignition temperature used in the process. The method is expected to be suitable for commercial fabrication of nanocrystalline multicomponent oxide ceramic powders.


2021 ◽  
pp. 160745
Author(s):  
Zhanglin Chen ◽  
Wei Cui ◽  
Kaiming Zhu ◽  
Chunguang Zhang ◽  
Chuandong Zuo ◽  
...  

RSC Advances ◽  
2016 ◽  
Vol 6 (95) ◽  
pp. 92360-92370 ◽  
Author(s):  
Raunak Kumar Tamrakar ◽  
D. P. Bisen ◽  
Kanchan Upadhyay ◽  
I. P. Sahu ◽  
Manjulata Sahu

Er3+ doped Gd2O3 phosphors were prepared via a combustion synthesis method. The prepared phosphor emits visible green colour.


2003 ◽  
Vol 18 (8) ◽  
pp. 1842-1848 ◽  
Author(s):  
F. Maglia ◽  
C. Milanese ◽  
U. Anselmi-Tamburini ◽  
Z. A. Munir

Microalloying of MoSi2 to form Mo(1−x)MexSi2 (Me = Nb or V) was investigated by the self-propagating high-temperature synthesis method. With alloying element contents up to 5 at.%, a homogeneous C11b solid solution was obtained. For higher contents of alloying elements, the product contained both the C11b and the hexagonal C40 phases. The relative amount of the C40 phase increases with an increase in the content of alloying metals in the starting mixture. The alloying element content in the hexagonal C40 Mo(1−x)MexSi2 phase was nearly constant at a level of about 12 at.% for all starting compositions. In contrast, the content of the alloying elements in the tetragonal phase is considerably lower (around 4 at.%) and increases slightly as the Me content in the starting mixture is increased.


2011 ◽  
Vol 186 ◽  
pp. 7-10 ◽  
Author(s):  
Gui Yang Liu ◽  
Jun Ming Guo ◽  
Bao Sen Wang ◽  
Ying He

Single phase Al3+ doped LiMn2O4 has been prepared by flameless solution combustion synthesis method at 600oC for 1h. X-ray diffraction (XRD) and scanning electric microscope (SEM) were used to determine the phase composition and micro morphology of the products. XRD analysis indicates that the purities increase and the lattice parameters of the products decrease with increasing Al3+ content. Electrochemical test indicates that the cycling performance of the products with Al3+ doping are better than that of the product without Al3+ doping. The product LiAl0.10Mn1.90O4 gets the best electrochemical performance. At the current density of 30mA/g, the initial discharge capacity of LiAl0.10Mn1.90O4 is 124.8mAh/g, and after 20 cycles, the capacity retention is more than 89%. SEM investigation indicates that the particles of LiAl0.10Mn1.90O4 are sub-micron in size and well dispersed.


Sign in / Sign up

Export Citation Format

Share Document