scholarly journals SURFACTANT-ASSISTED SOL-GEL AUTO-COMBUSTION SYNTHESIS OF SR-HEXAFERRITE NANOPOWDER USING DIFFERENT FUELS AND BASIC AGENTS

2012 ◽  
Vol 05 ◽  
pp. 744-751
Author(s):  
M. GHOBEITI HASSAB ◽  
S. A. SEYYED EBRAHIMI ◽  
R. DEHGHAN
Keyword(s):  
Citric Acid ◽  
Crystallite Size ◽  
Combustion Synthesis ◽  
Calcination Temperature ◽  
Cationic Surfactant ◽  
Sol Gel ◽  
Decyltrimethylammonium Bromide ◽  
Auto Combustion ◽  
Combustion Route ◽  
Surfactant Assisted

In this research Sr -hexaferrite powder was synthesized by a sol–gel auto-combustion route using two different fuels (glycine and citric acid) and two different basic agents (ammonia and trimethylamine). N -decyltrimethylammonium bromide ( C 13 H 30 BrN ) was also employed as a cationic surfactant. The results showed the finest crystallite size and the lowest calcination temperature have been obtained as 27.2 nm and 800 °C respectively, in the presence of citric acid, trimethylamine and surfactant.

Synthesis of (Ba,Ti)-Doped Apatite-Type Lanthanum Silicate Nano-Sized Powders via Microwave-Assisted Sol-Gel Auto-Combustion Route

2013 ◽  
Vol 652-654 ◽  
pp. 882-885 ◽  
Author(s):  
Ran Wu ◽  
Jia Mei Ye ◽  
Qi Zhao Li ◽  
Sheng Yun Wang ◽  
Xiu Lei Chen ◽  
...  
Keyword(s):  
Particle Size ◽  
Citric Acid ◽  
Sol Gel ◽  
Lanthanum Nitrate ◽  
Microwave Assisted ◽  
Auto Combustion ◽  
Combustion Route ◽  
Lanthanum Silicate ◽  
Apatite Type

In this paper, (Ba,Ti)-doped lanthanum silicate nano-sized powders have been synthesized via microwave assisted sol-gel auto-combustion route by using TEOS and lanthanum nitrate as the starting materials, citric acid and glycol as chelators. Both the phase compositions and morphologies of the obtained powders have been characterized. The results indicated that: the synthesized nano powders were characterized as fluffy aggregates with the particle size ranging from 50 to 100nm. As the doping contents of Ba increased, the crystalline sizes decreased and the aggregation were deteriorated, while the particle size decreased from 120nm to 80nm and the aggregation between particles were halted as the doping contents of Ti increased.

scholarly journals Effect of Calcination Temperature on Physical properties of Ni0.6Zn0.4Fe2O4  Ferrite nanoparticles

2021 ◽  
Author(s):  
sivakumar pendyala ◽  
G.k.Sivasankara Yadav
Keyword(s):  
Physical Properties ◽  
Crystallite Size ◽  
Calcination Temperature ◽  
Sol Gel ◽  
Average Crystallite Size ◽  
Combustion Method ◽  
Ferrite Nanoparticles ◽  
Calcination Temperatures ◽  
Auto Combustion ◽  
Lcr Meter

Abstract The influence of Calcination temperature on the physical properties of Ni0.6Zn0.4Fe2O4 ferrite nanoparticles were investigated. These ferrite nanoparticles have been synthesized by sol-gel auto combustion method using citric acid as fuel agent at different calcination temperatures (4000C, 5000C and 6000C). The Morphological investigation, average crystallite size and microstructure of the material were examined by using X-ray diffraction (XRD) and confirmed by field emission scanning electron microscope (FESEM) and FTIR spectra. The Effects of calcination temperature on the dielectric and magnetic properties were calculated by using LCR meter and vibrating sample magnetometer (VSM). The XRD result shows a single-phase cubic spinel structure with average crystallite size increases from 27 to 29.5 nm, with an increase of temperature. The highest saturation magnetization was found at a calcination temperature 6000C with value 80.39 emu/g, and the value coercive field (Hc) was inverse with the crystallite size.

Facile sol–gel auto-combustion synthesis of β-Zn3B2O6 nanoparticles: optical and photocatalytic studies

2017 ◽  
Vol 28 (23) ◽  
pp. 17961-17967
Author(s):  
Mehdi Mousavi-Kamazani ◽  
Reza Rahmatolahzadeh ◽  
Seyed Amin Shobeiri
Keyword(s):  
Combustion Synthesis ◽  
Sol Gel ◽  
Auto Combustion

Bi2WO6 Nanoparticles Prepared by Combustion Synthesis with Different Fuels and their Photocatalytic Activity

2014 ◽  
Vol 604 ◽  
pp. 93-101
Author(s):  
Maris Kodols ◽  
Sabine Didrihsone ◽  
Janis Grabis
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Citric Acid ◽  
Ethylene Glycol ◽  
Specific Surface ◽  
Crystallite Size ◽  
Combustion Synthesis ◽  
Surface Area ◽  
Specific Surface Area ◽  
Solution Ph

The influence of glycine, glycerine, ethylene glycol and citric acid fuel and their ratio to NO3- on formation and dispersity of Bi2WO6 nanoparticles prepared by combustion synthesis has been studied. The pure crystalline Bi2WO6 with specific surface area 24,8 m2/g and crystallite size of 28 nm was obtained by using glycerine as fuel at its ratio to NO3- of 0,67. The photocatalytic activity of the prepared Bi2WO6 in degradation of methylene blue depended on its specific surface area of samples and solution pH.

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