Effects of calcination temperature on phase formation and particle size of Zn2Nb34O87 powder synthesized by solid-state reaction

2013 ◽  
Vol 139 (2-3) ◽  
pp. 478-482 ◽  
Author(s):  
Penphitcha Amonpattaratkit ◽  
Supon Ananta
Keyword(s):  
Particle Size ◽  
Solid State ◽  
Calcination Temperature ◽  
Phase Formation ◽  
Solid State Reaction

Characterization of Nano-Structured Multiferroic Bismuth Ferrite Produced via Solid State Reaction Route

2013 ◽  
Vol 829 ◽  
pp. 683-687 ◽  
Author(s):  
Ebrahim Mostafavi ◽  
Abolghasem Ataie ◽  
Mostafa Ahmadzadeh
Keyword(s):  
Particle Size ◽  
Solid State ◽  
Calcination Temperature ◽  
Solid State Reaction ◽  
Bismuth Ferrite ◽  
Solid State Reaction Method ◽  
Rietveld Analysis ◽  
Molar Ratio ◽  
Conventional Solid State Reaction ◽  
Mean Particle Size

Multiferroic bismuth ferrite, BiFeO3, was synthesized via conventional solid-state reaction method using Bi2O3, Fe2O3 as starting materials. Effects of Bi2O3/Fe2O3 molar ratio and calcination temperature on the phase composition, morphology and magnetic properties of produced powders were systematically studied using XRD, FESEM/EDS and VSM techniques, respectively. The results revealed that BiFeO3 phase with rhombohedral R3c structure with a mean particle size of 40 nm was formed in the sample processed with a Bi2O3/Fe2O3 molar ratio of 1:1 after calcination at 800 °C. Rietveld analysis which was applied to the x-ray diffraction data via MAUD software indicated high purity of 95%wt for the above sample. Deviation from the stoichiometric molar ratio (Bi2O3/Fe2O3: 0.9, 1.1, 1.2) yielded higher content of the intermediate phases of Bi2Fe4O9 and Bi25FeO40. FESEM studies showed that the mean particle size was increased from 40 to 62 nm by increasing calcination temperature from 800 to 850 °C. VSM results for 1:1 molar ratio samples indicated that increasing the calcination temperature from 800 to 850 °C increased saturation magnetization (Ms) from 0.087 to 0.116 emu/g and also coercive field (Hc) from 60 to 100 Oe.

Particle size effects on yttrium aluminum garnet (YAG) phase formation by solid-state reaction

2014 ◽  
Vol 29 (19) ◽  
pp. 2303-2311 ◽  
Author(s):  
Elizabeth R. Kupp ◽  
Sujarinee Kochawattana ◽  
Sang-Ho Lee ◽  
Scott Misture ◽  
Gary L. Messing
Keyword(s):  
Particle Size ◽  
Solid State ◽  
Phase Formation ◽  
Solid State Reaction ◽  
Size Effects ◽  
Yttrium Aluminum Garnet ◽  
Particle Size Effects ◽  
Yttrium Aluminum ◽  
Image Position

Abstract

scholarly journals Texture Studies on Chromium Oxide Doped Catalysts

1987 ◽  
Vol 4 (1-2) ◽  
pp. 131-139
Author(s):  
K.M. Abd El-Salaam ◽  
A.M. El-Awad
Keyword(s):  
Solid State ◽  
Surface Area ◽  
Calcination Temperature ◽  
Phase Formation ◽  
Chromium Oxide ◽  
Solid State Reaction ◽  
Air Flow ◽  
Cation Vacancies ◽  
Molar Ratios ◽  
Surface Nature

Physisorption of N2 gas at 77 K has been used to determine the surface area (SBET) and porosity of Cr2O3 impregnated with Li2O in molar ratios extending from 0.25 to 50 mol %. Calcination of catalysts was affected in air flow in temperature range of 473-773 K. Variation of the SBET-calcination temperature relationship was interpreted according to the possible lattice rearrangements via a solid-state reaction leading to Li2CrO4 phase formation for Li2O rich samples and by creation of cation vacancies in case of Li2O trace samples. The cumulative calculations together with Va-t plots showed a mesoporous surface nature of samples.

Peculiarities of Intermetallic Phase Formation in the Process of a Solid State Reaction in (Al/Cu)n Multilayer Thin Films

JOM ◽  
2021 ◽  
Author(s):  
Evgeny T. Moiseenko ◽  
Sergey M. Zharkov ◽  
Roman R. Altunin ◽  
Oleg V. Belousov ◽  
Leonid A. Solovyov ◽  
...  
Keyword(s):  
Thin Films ◽  
Solid State ◽  
Phase Formation ◽  
Solid State Reaction ◽  
Intermetallic Phase ◽  
Multilayer Thin Films
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