Low-Temperature Combustion Synthesis and Characterization of Ce1-xPrxO2-δ Solid Solutions

2008 ◽  
pp. 253-255
Author(s):  
Cheng Peng ◽  
Zhen Zhang ◽  
Dong Lin Huang ◽  
Yan Li Liu
Keyword(s):  
Low Temperature ◽  
Combustion Synthesis ◽  
Solid Solutions ◽  
Synthesis And Characterization ◽  
Low Temperature Combustion ◽  
Temperature Combustion

Synthesis and Characterization of Nano CoFe[sub 2]O[sub 4] by Low-Temperature Combustion Synthesis Using Different Fuels

2011 ◽  
Author(s):  
D. M. Jnaneshwara ◽  
R. Gopala Krishna ◽  
H. Nagabhushana ◽  
B. M. Nagabhushana ◽  
C. Shivakumara ◽  
...  
Keyword(s):  
Low Temperature ◽  
Combustion Synthesis ◽  
Synthesis And Characterization ◽  
Low Temperature Combustion ◽  
Temperature Combustion

Low Temperature Combustion Synthesis and Characterization of Pr-CeO2 Doped with Zr Red Ceramic Pigments

2011 ◽  
Vol 399-401 ◽  
pp. 514-518
Author(s):  
Li Dan Yang ◽  
Ming Quan Ye ◽  
Ai Jun Han
Keyword(s):  
Low Temperature ◽  
Combustion Synthesis ◽  
Solid Solutions ◽  
Charge Transfer Band ◽  
Blue Shift ◽  
Fluorite Structure ◽  
Electronic Energy ◽  
Low Temperature Combustion ◽  
Visible Absorption ◽  
Temperature Combustion

New inorganic pigments Ce0.95ZrxPr0.05-xO2(x = 0, 0.01, 0.02, 0.03, 0.04, 0.05) based on CeO2-ZrO2-Pr6O11solid solutions were synthesized by low-temperature combustion synthesis (LCS) method using citric acid as a reductant and metal nitrate as an oxidant. The pigments are CeO2solid solutions doped with praseodymium and zirconium ions, and display colors ranging from dark brown via brick red to bright cream. The prepared pigments were characterized by X-ray powder diffraction, transmission electron microscopy, ultraviolet-visible absorption spectroscopy and colorimetrical measurements. Results show that cubic fluorite structure solid solution of 100 nm Ce0.95ZrxPr0.05-xO2particles can be obtained at 1000 °C. There was an effective absorption of visible blue and green in 600 nm, which is originated from the shift of charge transfer band in CeO2by doping of zirconium and praseodymium ions. Effective red hue was obtained for Ce0.95Zr0.02Pr0.03O2composition, which exhibited better L*, a*,and b* values (57.64, 23.83 and 23.78). The coloring mechanism is based on the introduction of an additional electronic energy level of unpaired 4f electron of the lanthanide ion into the cerianite forbidden band. Furthermore, the doping of Zr in Pr-CeO2system raises the slope of the absorption edge with a blue shift resulting in enhanced lightness. The prepared pigments were prospective to be alternatives for toxic pigments used in coloration of plastics.

scholarly journals Synthesis and characterization of zinc ferrite nanoparticles obtained by self-propagating low-temperature combustion method

2011 ◽  
Vol 34 (7) ◽  
pp. 1325-1330 ◽  
Author(s):  
P. M. Prithviraj Swamy ◽  
S. Basavaraja ◽  
Arunkumar Lagashetty ◽  
N. V. Srinivas Rao ◽  
R. Nijagunappa ◽  
...  
Keyword(s):  
Low Temperature ◽  
Zinc Ferrite ◽  
Combustion Method ◽  
Ferrite Nanoparticles ◽  
Synthesis And Characterization ◽  
Low Temperature Combustion ◽  
Temperature Combustion

Synthesis and Characterization of Nano-Sized AlN Powders by CRN Route from a Sol-Gel Low Temperature Combustion Precursor

2012 ◽  
Vol 557-559 ◽  
pp. 644-648 ◽  
Author(s):  
Qing Hua Yang ◽  
Huan Ping Wang ◽  
Wen Juan Zhang ◽  
Shi Feng Wang ◽  
Shi Qing Xu
Keyword(s):  
Low Temperature ◽  
Carbothermal Reduction ◽  
Sol Gel ◽  
Synthesis And Characterization ◽  
Low Temperature Combustion ◽  
Preparation Process ◽  
Small Particle Size ◽  
Temperature Combustion ◽  
Amorphous Alumina

Nano-sized aluminum nitride (AlN) powders were synthesized through a carbothermal reduction nitridation (CRN) route from a sol-gel low temperature combustion precursor. The precursor was precalcined at 600-1200 °C and then nitrided at 1400-1550 °C for different holding time to obtain AlN powders. During the whole preparation process, the amorphous alumina in the precursors first transformed to γ-Al2O3, then to α-Al2O3, and AlN was obtained through the nitridation of α-Al2O3with the reduction of carbon. The results show that the appropriate precalcination benefits the activity of precursors and promotes the formation of AlN phase due to the transition of amorphous alumina to γ-Al2O3, and the optimum precalcination temperature is 1000 °C. The effects of different nitridation parameters on the microstructure of AlN powders were also investigated. By being nitrided at 1500-1550 °C for 2 h, the AlN powders present a good distribution and small particle size of 30-90 nm from the precursor precalcinated at 1000 °C.

Sign in / Sign up

Export Citation Format

Share Document