scholarly journals Introduction of Particle Size Distribution into Solid-State Reaction Kinetics

1964 ◽  
Vol 13 (133) ◽  
pp. 759-766
Author(s):  
Hiromu SASAKI
Keyword(s):  
Particle Size ◽  
Solid State ◽  
Particle Size Distribution ◽  
Reaction Kinetics ◽  
Size Distribution ◽  
Solid State Reaction ◽  
Solid State Reaction Kinetics

The Investigations on Luminescence Characteristics and Influence of Doping and Co-Doping Different Rare Earth Ions in White Phosphorescence Materials Having Different Luminescent Centers

2014 ◽  
Vol 90 ◽  
pp. 133-140
Author(s):  
Erkul Karacaoglu ◽  
Bekir Karasu ◽  
Esra Öztürk
Keyword(s):  
Particle Size ◽  
Rare Earth ◽  
Solid State ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Rare Earths ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Reaction Method ◽  
Luminescence Characteristics

The Akermanite type alkaline earth silicate Ca2MgSi2O7 activated by different types of rare earths was prepared by the conventional solid state reaction method under weak reductive atmosphere. The phase formation, particle size distribution, particle morphologies and photoluminescence properties of the samples have been investigated respectively. The comparative results of SEM and laser particle size analysis revealed that the relatively regular morphology, smaller particle size distribution could be achieved for the phosphors synthesized by the solid state reaction method including dry-ground after which powders were sieved below 170 meshes. The effects of rare earth oxides; Nd2O3, Pr6O11, Ce2O3 and Sm2O3 on the luminescence properties of the host material, Ca2MgSi2O7, were studied. Remarkable enhancement and novel color emitting including white in luminescence characteristics of host material were observed as a result of doping the mentioned rare-earths were doped.

Influence of particle size distribution of precursor oxides on the synthesis of cordierite by solid-state reaction

2005 ◽  
Vol 153 (1) ◽  
pp. 34-42 ◽  
Author(s):  
J.R. González-Velasco ◽  
R. Ferret ◽  
R. López-Fonseca ◽  
M.A. Gutiérrez-Ortiz
Keyword(s):  
Particle Size ◽  
Solid State ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Solid State Reaction

High Tc Oxide Solid State Reaction Kinetics Via Complex Impedance Spectroscopy

1989 ◽  
Vol 169 ◽  
Author(s):  
E. A. Cooper ◽  
T. O. Mason ◽  
U. Balachandran ◽  
M. L. Kullberg
Keyword(s):  
Activation Energy ◽  
Particle Size ◽  
Solid State ◽  
Solid State Reaction ◽  
Complex Impedance ◽  
Particle Size Effect ◽  
Large Temperature ◽  
Impedance Spectra ◽  
High Tc ◽  
Solid State Reaction Kinetics

AbstractImpedance spectra (5Hz ‐ 13MHz) were collected during the solid state reaction of Yba2Cu2O6+y from large monosized CuO particles imbedded in a finely divided Y2 O3 /BaCO3 matrix. No particle size effect was observed, but a large temperature effect was observed corresponding to an activation energy of approximately 1.8eV (175kJ/mol) over the range 700‐900°C.

Order–disorder transitions and solid state reaction kinetics in Na2SO4–K2SO4 system

1984 ◽  
Vol 62 (6) ◽  
pp. 1227-1228
Author(s):  
M. Sunitha Kumari ◽  
Etalo A. Secco. I
Keyword(s):  
Solid State ◽  
Reaction Kinetics ◽  
Solid State Reaction ◽  
Solid State Reaction Kinetics

not available

scholarly journals Synthesis and Characterization of Rutile Pigments with Cr and Nb

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Jan Večeřa ◽  
Iveta Šedová ◽  
Petr Mikulášek ◽  
Petra Šulcová
Keyword(s):  
Particle Size ◽  
Solid State ◽  
Particle Size Distribution ◽  
Solid State Reaction ◽  
Organic Matrix ◽  
Synthesis And Characterization ◽  
Visual Color ◽  
Rutile Pigments ◽  
Titanium Compounds

Rutile pigments Ti1-3xCrxNb2xO2±δ (where x=0, 0.05, 0.10, 0.20, 0.30 and 0.50) prepared by solid-state reaction are investigated. Chromium is chromophore (coloring ion) and niobium is counterion (charge-compensating element for electroneutrality). The effect of composition (x), calcination temperature (850, 900, 950, 1000, 1050, 1100 and 1150°C), and starting titanium compounds (anatase TiO2, hydrated anatase paste, TiOSO4·2H2O, and hydrated Na2Ti4O9 paste) on their color properties into organic matrix and particle size distribution was observed. According to the highest chroma C and visual color evaluation, yellow and orange pigments were selected as in color the most interesting. They have concentration x=0.05 or 0.10 and are prepared from anatase TiO2 and TiOSO4·2H2O at temperature ≥1050°C.

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