Strong upconversion from Er3Al5O12 ceramic powders prepared by low temperature direct combustion synthesis

2006 ◽  
Vol 89 (8) ◽  
pp. 081109 ◽  
Author(s):  
Glauco S. Maciel ◽  
Nikifor Rakov ◽  
Michael Fokine ◽  
Isabel C. S. Carvalho ◽  
Carlos B. Pinheiro
Keyword(s):  
Low Temperature ◽  
Combustion Synthesis ◽  
Ceramic Powders ◽  
Direct Combustion

Investigation of Eu3+ luminescence intensification in Al2O3 powders codoped with Tb3+ and prepared by low-temperature direct combustion synthesis

2006 ◽  
Vol 88 (8) ◽  
pp. 081908 ◽  
Author(s):  
Nikifor Rakov ◽  
Glauco S. Maciel ◽  
Whualkuer B. Lozano ◽  
Cid B. de Araújo
Keyword(s):  
Low Temperature ◽  
Combustion Synthesis ◽  
Direct 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.

Enhanced up-conversion emission in Er3+ doped barium–natrium–yttrium–fluoride phosphor by alkali ions introduction under 1550 nm excitation

CrystEngComm ◽  
2021 ◽  
Author(s):  
Feng Hu ◽  
Qian Wan ◽  
Liping Lu ◽  
Haiying Sun ◽  
Xiyan Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Combustion Synthesis ◽  
Low Temperature Combustion ◽  
Yttrium Fluoride ◽  
Alkali Ions ◽  
Temperature Combustion

Multi-component fluoride phosphors BaxNay-nMnYzF2x+y+3z+3m: Er3+m (M=Li, K) sensitive to 1550 nm were synthesized by the low temperature combustion synthesis (LCS) method. The optimum batch formula was determined by the orthogonal...

La2-xSrxNiO4+δ Ceramic Powders Prepared by Combustion Synthesis

2001 ◽  
Vol 206-213 ◽  
pp. 155-158 ◽  
Author(s):  
Maria Teresa Colomer ◽  
Eva Chinarro ◽  
J.R. Jurado
Keyword(s):  
Combustion Synthesis ◽  
Ceramic Powders
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