Phase composition, densification and electrical conductivity of La0.9Sr0.1Ga0.8Mg0.2O3− consolidated by the two-stage sintering method

2015 ◽  
Vol 41 (10) ◽  
pp. 14299-14305 ◽  
Author(s):  
S.L. Reis ◽  
E.N.S. Muccillo
Keyword(s):  
Electrical Conductivity ◽  
Phase Composition ◽  
Two Stage ◽  
Sintering Method

scholarly journals Investigation of selenium compounds as targets for 76,77Br production using protons of energies up to 34 MeV

2017 ◽  
Vol 105 (10) ◽  
Author(s):  
H. Ebrahim Hassan ◽  
Khaled M. El-Azony ◽  
Ahmed Azzam ◽  
Syed M. Qaim
Keyword(s):  
Phase Composition ◽  
X Ray Diffraction ◽  
Selenium Compounds ◽  
X Ray ◽  
Conventional Sintering ◽  
Sintering Method ◽  
Separation Conditions

AbstractSelenium compounds of Zn, Sn and Cu were prepared using a conventional sintering method and the phase composition of each compound was investigated using X-ray diffraction. The compounds prepared were tested under variable irradiation and separation conditions for

Phase Composition, Electrical Conductivity, and Stability of ZrO2–Sc2O3–Cr2O3Solid Electrolytes

2004 ◽  
Vol 40 (10) ◽  
pp. 1073-1078 ◽  
Author(s):  
Yu. N. Karavaev ◽  
A. D. Neuimin ◽  
E. G. Vovkotrub
Keyword(s):  
Electrical Conductivity ◽  
Phase Composition

Research on Preparation Technology for Machinable Ceramics

2014 ◽  
Vol 804 ◽  
pp. 203-206
Author(s):  
Hao Zhang ◽  
Yan Xu ◽  
Hai Yun Jin ◽  
Guan Jun Qiao
Keyword(s):  
Heat Treatment ◽  
Growth Rate ◽  
Phase Composition ◽  
Crystallization Temperature ◽  
Treatment Process ◽  
Glass Ceramics ◽  
Heat Treatment Process ◽  
Preparation Technology ◽  
The Relationship ◽  
Sintering Method

In this paper, the compact SiO2-B2O3-Al2O3-MgO-F machinable ceramics were prepared through melt-cast and sintering method. The phase composition and microstructure of the ceramics were analyzed and observed using XRD and SEM, and the relationship between processing and microstructure were discussed. The results showed that, after the heat treatment, the main phase of the ceramics changed from fluorophlogopite (mica like) to fluoramphibole (rod like). When the crystallization temperature at 950°C, the nuclei growth rate of the mica glass-ceramics was higher. Meanwhile, a small quantity of forsterite (Mg2SiO4) was also crystallized out in the process. The best heat treatment process was nucleated at 630°C for 2h and crystallized at 950°C for 2h.

Thermoelectrical properties of α phase and γ phase NaxCo2O4 ceramics prepared by spark plasma sintering method

2013 ◽  
Vol 1490 ◽  
pp. 57-62 ◽  
Author(s):  
Natsuko Mikami ◽  
Keishi Nishio ◽  
Koya Arai ◽  
Tatsuya Sakamoto ◽  
Masahiro Minowa ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Spark Plasma Sintering ◽  
Figure Of Merit ◽  
Dimensionless Figure Of Merit ◽  
Α Phase ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Sintering Method ◽  
Acid Compound

ABSTRACTThe thermoelectrical properties of α and γ phases of NaxCo2O4 having different amounts of Na were evaluated. The γ NaxCo2O4 samples were synthesized by thermal decomposition in a metal-citric acid compound, and the α NaxCo2O4 samples were synthesized by self-flux processing. Dense bulk ceramics were fabricated using spark plasma sintering (SPS), and the sintered samples were of high density and highly oriented. The thermoelectrical properties showed that γ NaxCo2O4 had higher electrical conductivity and lower thermal conductivity compared with α NaxCo2O4 and that α NaxCo2O4 had a larger Seebeck coefficient. These results show that γ NaxCo2O4 has a larger power factor and dimensionless figure of merit, ZT, than α NaxCo2O4.

EVOLUTION OF MICROSTRUCTURE AND PHASE COMPOSITION UPON ANNEALING OF LiFePO4 PREPARED BY A LOW TEMPERATURE METHOD

2011 ◽  
Vol 04 (02) ◽  
pp. 117-122 ◽  
Author(s):  
W. ZAJAC ◽  
J. MARZEC ◽  
W. MAZIARZ ◽  
A. RAKOWSKA ◽  
J. MOLENDA
Keyword(s):  
Electrical Conductivity ◽  
Phase Composition ◽  
High Resolution ◽  
Microstructural Characterization ◽  
Temperature Method ◽  
High Resolution Tem ◽  
Iron Valence ◽  
Evolution Of Microstructure ◽  
Type Crystal

The effect of annealing of nanosized LiFePO 4 powder on microstructure, phase composition, iron valence state and electrical conductivity has been studied. Careful microstructural characterization of the as-prepared powder using high resolution TEM revealed presence of {010}-type crystal planes at the surface of crystallites, which seem to be beneficial to electrochemical activity. The second part of the work is focused on explanation of presence and evolution of Fe 3+ detected in the material. Transmission and CEMS modes of Mössbauer spectroscopy together with TEM allowed for ruling out concept of amorphous layers containing Fe 3+ ions covering crystalline LiFePO 4 grains.

scholarly journals STUDY OF THE PHASE COMPOSITION AND ELECTRICAL CONDUCTIVITY OF THE Cu–Cr–Si–Ce–La SYSTEM ALLOYS

2018 ◽  
Vol 18 (2) ◽  
pp. 54-63
Author(s):  
O.V. Samoylova ◽  
◽  
E.A. Trofimov ◽  
N.A. Shaburova ◽  
V.I. Geraskin
Keyword(s):  
Electrical Conductivity ◽  
Phase Composition
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