Formation mechanism of Mn x Fe 3−x O 4 by solid-state reaction of MnO 2 and Fe 2 O 3 in air atmosphere: Morphologies and properties evolution

2017 ◽  
Vol 313 ◽  
pp. 201-209 ◽  
Author(s):  
Bingbing Liu ◽  
Yuanbo Zhang ◽  
Zijian Su ◽  
Manman Lu ◽  
Zhiwei Peng ◽  
...  
Keyword(s):  
Solid State ◽  
Formation Mechanism ◽  
Solid State Reaction ◽  
Air Atmosphere

Formation Mechanism of Garnet-Like Li7La3Zr2O12 Powder Prepared by Solid State Reaction

2016 ◽  
Vol 45 (3) ◽  
pp. 612-616 ◽  
Author(s):  
Hongxia Geng ◽  
Kai Chen ◽  
Di Yi ◽  
Ao Mei ◽  
Mian Huang ◽  
...  
Keyword(s):  
Solid State ◽  
Formation Mechanism ◽  
Solid State Reaction

scholarly journals Luminescence properties and energy transfer in Tb3+ and Eu3+ co-doped Ba2P2O7 phosphors

RSC Advances ◽  
2017 ◽  
Vol 7 (25) ◽  
pp. 15222-15227 ◽  
Author(s):  
Baoxing Wang ◽  
Qiang Ren ◽  
Ou Hai ◽  
Xiulan Wu
Keyword(s):  
Energy Transfer ◽  
High Temperature ◽  
Solid State ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Luminescence Properties ◽  
Energy Transfer Mechanism ◽  
Reaction Method ◽  
Air Atmosphere ◽  
Co Doped

The Ba2P2O7:Tb3+, Eu3+ phosphors were synthesized by a high temperature solid-state reaction method in air atmosphere and their crystal structures, lifetime, luminescence properties, and energy transfer mechanism were investigated in detail.

Study on Formation Mechanism of Fayalite (Fe2SiO4) by Solid State Reaction in Sintering Process

JOM ◽  
2017 ◽  
Vol 70 (4) ◽  
pp. 539-546 ◽  
Author(s):  
Zhongbing Wang ◽  
Bing Peng ◽  
Lifeng Zhang ◽  
Zongwen Zhao ◽  
Degang Liu ◽  
...  
Keyword(s):  
Solid State ◽  
Formation Mechanism ◽  
Solid State Reaction ◽  
Sintering Process

Thermopower of Sr1-xLaxMnO3 (x = 0.1-1.0)

2013 ◽  
Vol 770 ◽  
pp. 343-345
Author(s):  
Nattayaporn Boonmeethongyoo ◽  
Tosawat Seetawan
Keyword(s):  
Steady State ◽  
Solid State ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Reaction Method ◽  
Temperature Range ◽  
Air Atmosphere ◽  
Steady State Method ◽  
State Method

The polycrystalline of Sr1xLaxMnO3 (x = 0.11.0) samples were synthesized by solid state reaction method and general sintering. The Sr1xLaxMnO3 powders were calcined and sintered by furnace at 900 K and 1173 K for 3 hours in air atmosphere, respectively. Thermopower of the samples were measured by steady state method at temperature range of 290-520 K in air. The thermopower all samples were increased with increasing the La content substitution.

scholarly journals Preparation and Formation Mechanism of the (NH4)3PMo6W6O40 Nanoparticles by Solid State Reaction at Room Temperature

2003 ◽  
Vol 19 (08) ◽  
pp. 733-736
Author(s):  
Zhou Li-Qun ◽  
◽  
Liu Shi-Zhong ◽  
Yu Guo-Feng ◽  
Sun Ju-Tang
Keyword(s):  
Solid State ◽  
Formation Mechanism ◽  
Solid State Reaction ◽  
Room Temperature

Synthesis and Characterization of SmBa2Cu3Oy Powder Prepared by Solid-State Reaction

2020 ◽  
Vol 12 (2) ◽  
pp. 180-185
Author(s):  
Paitoon Boonsong ◽  
Pimpilai Wannasut ◽  
Chakrit Sriprachuabwong ◽  
Adisorn Tuantranont ◽  
Anucha Watcharapasorn
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Oxygen Deficiency ◽  
Solid State Reaction Method ◽  
Quantitative Phase Analysis ◽  
Phase Identification ◽  
Stoichiometric Ratio ◽  
Air Atmosphere ◽  
Main Crystalline Phase

In this work, the SmBa2Cu3Oy (Sm-123) powder was successfully prepared by solid-state reaction method under a normal air atmosphere using a stoichiometric ratio (i.e., Sm:Ba:Cu = 1:2:3) of high-purity Sm2O3, BaCO3 and CuO starting powders. Thermal properties of the as-calcined powder were studied by DSC/TGA technique and the results showed a formation of Sm-123 phase at 900 °C. The as-calcined powder was prepared by heating the starting precursors at 900 °C for 6–30 h. Phase identification was determined using an X-ray diffractometer (XRD). The quantitative phase analysis was analyzed by fitting the XRD pattern using the GSAS-II program. The result of XRD showed that the SmBa2 Cu3Oy (Sm-123) was identified as the main crystalline phase. The morphology was observed by scanning electron microscopy (SEM) with chemical composition identification from EDS mode. The surface of Sm-123 powder exhibited large agglomerates with a size range of ∼4.44–6.75 m. The Raman spectra showed a vibrational Raman-active phonon mode lying at around ∼502–508 cm–1. The peaks originated from the apical oxygen O(4) (i.e., O(4)-Ag mode) along the c-axis could be correlated with the oxygen deficiency in the CuO2 planes of orthorhombic SmBa2Cu3Oy. The calculated oxygen content from these peaks tended to decrease with increasing calcination time. All of these frequencies confirmed the presence of phonon and bonding typical for the 123-type structure.

The Preparation and Characterization of Y145 Superconductor

2013 ◽  
Vol 770 ◽  
pp. 295-298 ◽  
Author(s):  
P. Chainok ◽  
Supphadate Sujinnapram ◽  
T. Nilkamjon ◽  
S. Ratreng ◽  
K. Kritcharoen ◽  
...  
Keyword(s):  
Critical Temperature ◽  
Solid State ◽  
Physical Properties ◽  
Solid State Reaction ◽  
Raw Materials ◽  
Resistivity Measurement ◽  
Peritectic Temperature ◽  
Air Atmosphere ◽  
Mixed Ground

In this research, we synthesized and characterized the physical properties of YBa2Cu3Ox (Y123) and YBa4Cu5Ox (Y145) superconductors by solid state reaction and melt process. The raw materials Y2O3, BaCO3 and CuO were mixed, ground and react in the air atmosphere at 950 °C, at 980 °C for solid state reaction and melt process, respectively. The samples obtained were characterized by the resistivity measurement, SEM, EDX, XRD and DTA. It was found that the critical temperature onset of Y145 is 94 K and 96 K for solid state reaction and melt process, respectively. The samples were inhomogeneous with no impurity. The crystal structures was orthorhombic which a = 3.80446 Å, b = 3.86474 Å and c = 19.37104 Å for Y145 solid state reaction and a = 3.80180 Å, b = 3.86483 Å and c = 19.38194 Å for melt process. The peritectic temperature of Y145 is 1018 °C.

The wustite-spinel interface

1987 ◽  
Vol 45 ◽  
pp. 268-269
Author(s):  
S.R. Summerfelt ◽  
C.B. Carter
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Strain Energy ◽  
Matrix Material ◽  
Lattice Misfit ◽  
Solid State Reactions ◽  
Oxygen Sublattice ◽  
Large Particles ◽  
Small Lattice ◽  
Coherent Interfaces

The wustite-spinel interface can be viewed as a model interface because the wustite and spinel can share a common f.c.c. oxygen sublattice such that only the cations distribution changes on crossing the interface. In this study, the interface has been formed by a solid state reaction involving either external or internal oxidation. In systems with very small lattice misfit, very large particles (>lμm) with coherent interfaces have been observed. Previously, the wustite-spinel interface had been observed to facet on {111} planes for MgFe2C4 and along {100} planes for MgAl2C4 and MgCr2O4, the spinel then grows preferentially in the <001> direction. Reasons for these experimental observations have been discussed by Henriksen and Kingery by considering the strain energy. The point-defect chemistry of such solid state reactions has been examined by Schmalzried. Although MgO has been the principal matrix material examined, others such as NiO have also been studied.

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