scholarly journals Preparation and characterization of synthetic tobermorite (CaO–Al2O3–SiO2–H2O) using bio and municipal solid wastes as precursors by solid state reaction

2020 ◽  
Author(s):  
Yinusa Daniel Lamidi ◽  
Seun Samuel Owoeye ◽  
Segun Michael Abegunde
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Solid Wastes ◽  
Municipal Solid Wastes

scholarly journals Synthesis and Thermal Properties of Cerium-Dysprosium Oxide

2016 ◽  
Vol 61 (2) ◽  
pp. 965-969 ◽  
Author(s):  
M. Mikuśkiewicz ◽  
M. Stopyra ◽  
G. Moskal
Keyword(s):  
Thermal Properties ◽  
Phase Composition ◽  
Thermal Diffusivity ◽  
Solid State ◽  
Cerium Oxide ◽  
Solid State Reaction ◽  
Synthesis And Characterization ◽  
Equimolar Ratio ◽  
Dysprosium Oxide

Abstract The paper presents results of investigation on synthesis and characterization of cerium-dysprosium oxide. The input powders - dysprosium oxide Dy2O3 and cerium oxide CeO2 - were mixed so as to obtain equimolar ratio of cations, milled in alcohol and synthesized via solid state reaction process at 1350°C under 15MPa in vacuum for 2h. The microstructure, phase composition and thermal properties were analyzed. The obtained material was multiphase. Non-stoichiometric compounds were identified. Thermal diffusivity of investigated material decreased in the temperature range of 25-1000°C from 0,71 to 0,45 mm2/s.

Characterization of Antiferromagnetism in Double Perovskites Ba2FeMoO6 Prepared by Solid State Method

2019 ◽  
Vol 891 ◽  
pp. 224-229
Author(s):  
Naphat Albutt ◽  
Vanussanun Aitviriyaphan ◽  
Thanapong Sareein ◽  
Sudarath Suntaropas ◽  
Panakamon Thonglor ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Solid State ◽  
Solid State Reaction ◽  
Double Perovskite ◽  
Solid State Reaction Method ◽  
Double Perovskites ◽  
Solid State Method ◽  
Reaction Method ◽  
State Method

The magnetic properties of Ba2FeMoO6 (BFMO) double perovskite are investigated. BFMO samples were prepared by solid state reaction method through compression. Magnetic properties are influenced by electron environments of the Fe3+ and Mo5+ ions within the perovskite structure. BFMO sintered at 800 oC exhibited the largest hysteresis loop at 50 K. In addition, the values of Ms and Mr indicate ferromagnetic behaviour in BFMO ceramics sintered at 800 oC for different times up to 10 hours. Using the Curie-Weiss law fitting to investigate μeff~30μB high spin of Fe and Mo, and negative θ present the antiferromagnetic characteristics of the BFMO sample.

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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