Structural evolution and electrical properties of the biphasic compound α-Al 2 O 3 :MgAl 2 O 4

2017 ◽  
Vol 90 ◽  
pp. 244-252 ◽  
Author(s):  
K. Chitrarasu ◽  
J. Udaya Bhanu ◽  
R. Dhanabal ◽  
A. Chandrabose ◽  
P. Thangadurai
Keyword(s):  
Electrical Properties ◽  
Structural Evolution

Effect of La doping on the structural and electrical properties of SrBi2Ta2O9

2004 ◽  
Vol 811 ◽  
Author(s):  
Ortega Nora ◽  
S. Bhattacharyya ◽  
P. Bhattacharya ◽  
R.R. Das ◽  
R.S. Katiyar
Keyword(s):  
Electrical Properties ◽  
Structural Evolution ◽  
Phase Segregation ◽  
X Ray Diffraction ◽  
Lanthanum Doping ◽  
X Ray ◽  
La Doping ◽  
Structural And Electrical Properties ◽  
Vibrational Characteristics ◽  
La Substitution

ABSTRACTThe effect of anthanum substitution (0-20%) on phase formation, structural evolution and electrical properties of SrBi2Ta2O9 (SBT) ceramics were investigated. X-ray diffraction studies revealed that phase pure SBT bulk samples can be synthesized with lanthanum doping without any phase segregation. Raman spectroscopy was used to understand the lattice vibrational characteristics of La substituted SBT compound. The ferroelectric soft mode at 27 cm−1 was shifted towards the lower frequencies at room temperature with increase in La concentrations. The octahedral stretching mode (O-Ta-O) did not influenced by La substitution in SBT. The x-ray photoemission spectroscopy measurements showed the decrease of binding energy of Bi 4f core levels (5/2 and 7/2) upon La substitution in SBT. The dielectric constant was increased from 120 to 190 up to 10% La doping and decreased with further increase in La concentration.

Structural evolution of hydrothermal carbon spheres induced by high temperatures and their electrical properties under compression

Carbon ◽  
2017 ◽  
Vol 121 ◽  
pp. 426-433 ◽  
Author(s):  
Zhipeng Wang ◽  
Hironori Ogata ◽  
Gan Jet Hong Melvin ◽  
Michiko Obata ◽  
Shingo Morimoto ◽  
...  
Keyword(s):  
Electrical Properties ◽  
High Temperatures ◽  
Structural Evolution ◽  
Carbon Spheres ◽  
Hydrothermal Carbon Spheres

Suspensions of carbon nanofibers in organic medium: rheo-electrical properties

2015 ◽  
Vol 17 (48) ◽  
pp. 32316-32327 ◽  
Author(s):  
Mohamed Youssry ◽  
Dominique Guyomard ◽  
Bernard Lestriez
Keyword(s):  
Electrical Properties ◽  
Aspect Ratio ◽  
Carbon Nanofibers ◽  
Propylene Carbonate ◽  
High Aspect Ratio ◽  
Structural Evolution ◽  
Organic Medium

The nonaqueous suspensions of carbon nanofibers (CNFs) in 1 M lithium bis(trifluoromethanesulfonaimide) in propylene carbonate electrolyte reveal unique structural evolution and shear-induced transition due to the high aspect ratio.

scholarly journals Structural Evolution and Electrical Properties of BaTiO3 Doped with Gd3+

2017 ◽  
Vol 20 (2) ◽  
pp. 538-542 ◽  
Author(s):  
Juan Pablo Hernández Lara ◽  
Miguel Pérez Labra ◽  
Francisco Raúl Barrientos Hernández ◽  
Jose Antonio Romero Serrano ◽  
Erika Osiris Ávila Dávila ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Structural Evolution

Structural evolution and electrical properties of Na0.5Bi0.5TiO3-CoFe2O4 ceramics with embedded structures

2018 ◽  
Vol 44 (18) ◽  
pp. 22549-22555 ◽  
Author(s):  
Fangzhe Li ◽  
Hua Ke ◽  
Hongjun Zhang ◽  
Liwei Zhang ◽  
Huijiadai Luo ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Structural Evolution ◽  
Embedded Structures

Correlation Between the Microstructures and the Electrical Properties of Ni/Au/Te/Au Contacts on n-GaAs

1994 ◽  
Vol 337 ◽  
Author(s):  
X. W. Lin ◽  
J. Watté ◽  
K. Wuyts ◽  
W. Swider ◽  
R.E. Silverans ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Electrical Properties ◽  
Ohmic Contact ◽  
Ohmic Contacts ◽  
Structural Evolution ◽  
Reaction Products ◽  
Transmission Electron ◽  
Major Reaction ◽  
Ohmic Contact Formation

ABSTRACTThe structural evolution of Ni/Au/Te/Au contacts on n-GaAs (001) was examined, in correlation with their electrical properties as a function of rapid thermal annealing in the temperature range 350 - 600°C. It was found that heating at temperatures ≥ 550°C results in the formation of ohmic contacts, while contacts annealed at lower temperatures remain nonohmic. Transmission electron microscopy revealed that heating ≥ 450°C leads to extensive reactions between Ni/Au/Te/Au and GaAs and deep spike formation into the GaAs. The major reaction products were identified as NiAs and β-AuGa. Ga2Te3 grains, growing epitaxially on GaAs, were detected only in 550°C annealed samples. Heating to 600°C caused considerable Ga2Te3 loss. Implications of these results concerning the ohmic contact formation mechanism are discussed.

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