Effect of Alumina on Calcium Ferrites Development in the Goethite Ore Sinters

2022 ◽  
Author(s):  
Dali Hariswijaya ◽  
Leonardo Tomas Da Rocha ◽  
Edson Kugara Chiwandika ◽  
Sung-Mo Jung
Keyword(s):  
Calcium Ferrites

scholarly journals Synthesis of Calcium Ferrites and Their Properties

1969 ◽  
Vol 9 (4) ◽  
pp. 324-334
Author(s):  
Kojiro KOJIMA ◽  
Kyoichi NAGANO ◽  
Tadahiro INAZUMI ◽  
Koichi SHINADA
Keyword(s):  
Calcium Ferrites

Reduction Behavior of Ternary Calcium Ferrites for CaO–Fe2O3–MgO System

2018 ◽  
pp. 121-129
Author(s):  
Senwei Xuan ◽  
Xuewei Lv ◽  
Kai Tang ◽  
Chengyi Ding ◽  
Gang Li ◽  
...  
Keyword(s):  
Reduction Behavior ◽  
Calcium Ferrites

scholarly journals Magnetic Nanoparticles of Zinc/Calcium Ferrite Decorated with Silver for Photodegradation of Dyes

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3582 ◽  
Author(s):  
Ricardo J. C. Fernandes ◽  
Carlos A. B. Magalhães ◽  
Carlos O. Amorim ◽  
Vítor S. Amaral ◽  
Bernardo G. Almeida ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Optical Band Gap ◽  
Magnetic Measurements ◽  
Ferrite Nanoparticles ◽  
Calcium Ferrite ◽  
Size Estimation ◽  
Visible Absorption ◽  
Uv Visible ◽  
Calcium Ferrites ◽  
Reactive Red 195

Magnetic nanoparticles of zinc/calcium ferrite and decorated with silver were prepared by coprecipitation method. The obtained nanoparticles were characterized by UV/Visible absorption, XRD, TEM and SQUID. The mixed zinc/calcium ferrites exhibit an optical band gap of 1.78 eV. HR-TEM imaging showed rectangular nanoplate shapes with sizes of 10 ± 3 nm and aspect ratio mainly between 1 and 1.5. Magnetic measurements indicated a superparamagnetic behavior. XRD diffractograms allowed a size estimation of 4 nm, which was associated with the nanoplate thickness. The silver-decorated zinc/calcium ferrite nanoparticles were successfully employed in the photodegradation of a model dye (Rhodamine B) and industrial textile dyes (CI Reactive Red 195, CI Reactive Blue 250 and CI Reactive Yellow 145). The nanosystems developed exhibited promising results for industrial application in effluent photoremediation using visible light, with the possibility of magnetic recovery.

Hydrates of calcium ferrites and calcium aluminoferrites

1977 ◽  
Vol 7 (4) ◽  
pp. 399-409 ◽  
Author(s):  
D.E. Rogers ◽  
L.P. Aldridge
Keyword(s):  
Calcium Ferrites

Characterization and Applications of Calcium Ferrites Based Materials Containing Active Oxygen Species

2006 ◽  
Vol 45 ◽  
pp. 2169-2175 ◽  
Author(s):  
Daisuke Hirabayashi ◽  
Takeshi Yoshikawa ◽  
Yoshiki Kawamoto ◽  
Kazuhiro Mochizuki ◽  
Kenzi Suzuki
Keyword(s):  
High Temperature ◽  
Structural Transition ◽  
Active Oxygen Species ◽  
Active Oxygen ◽  
Calcium Ferrite ◽  
Methane Partial Oxidation ◽  
Oxygen Species ◽  
Calcium Ferrites ◽  
Oxide Ions ◽  
Oxidation Mechanisms

Characterization and application of calcium ferrites based solid solutions containing active oxygen species for catalysts in propylene total and methane partial oxidation has been studied. The calcium ferrite based solutions containing brownmillerite phases showed a structural transition based on the migration of oxide ions at high temperature. The calcium ferrite solution provided two types of active oxygen species due to the existence of the brownmillerite phase. These oxygen species individually played important roles in the propylene and methane oxidation mechanisms.

scholarly journals Structural and Electrical Properties of Aluminium Substituted Nano Calcium Ferrites

2014 ◽  
Vol 5 ◽  
pp. 780-786 ◽  
Author(s):  
Ch. Mamatha ◽  
M. Krishnaiah ◽  
C.S. Prakash ◽  
Kishor G. Rewatkar
Keyword(s):  
Electrical Properties ◽  
Structural And Electrical Properties ◽  
Calcium Ferrites

Synthesis and structural characterization of gadolinium—calcium ferrites Gd1-xCaxFeO3-y ()

1997 ◽  
Vol 261 (1-2) ◽  
pp. 299-303 ◽  
Author(s):  
J. Li ◽  
D. Song ◽  
T.M. Wang ◽  
Z. Su
Keyword(s):  
Structural Characterization ◽  
Calcium Ferrites

scholarly journals Study on the Properties of Calcium Ferrites in the Ca O-Fe0-Fe2O3 Ternary System

1968 ◽  
Vol 54 (1) ◽  
pp. 14-19 ◽  
Author(s):  
Minoru ASADA ◽  
Yasuo OMORI ◽  
Koji SANBONGI
Keyword(s):  
Ternary System ◽  
Calcium Ferrites
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