scholarly journals Analytical Electron Microscopy Characterization of a Temperature-Stable Relaxor Ferroelectric Ceramic

2019 ◽  
Vol 25 (S2) ◽  
pp. 2118-2119
Author(s):  
Teresa Roncal-Herrero ◽  
John Harrington ◽  
Aurang Zeb ◽  
Steven J Milne ◽  
Andy P. Brown
Keyword(s):  
Electron Microscopy ◽  
Analytical Electron Microscopy ◽  
Ferroelectric Ceramic ◽  
Relaxor Ferroelectric ◽  
Analytical Electron ◽  
Microscopy Characterization

Electron microscopy characterization of Ba(Cd1/3Ta2/3)O3 microwave dielectrics with boron additive

2004 ◽  
Vol 19 (5) ◽  
pp. 1387-1391 ◽  
Author(s):  
J. Sun ◽  
Shaojun Liu ◽  
N. Newman ◽  
M.R. McCartney ◽  
David. J. Smith
Keyword(s):  
Electron Microscopy ◽  
Amorphous Phase ◽  
Analytical Electron Microscopy ◽  
Microwave Dielectrics ◽  
Boron Segregation ◽  
Analytical Electron ◽  
Lattice Images ◽  
Microscopy Characterization ◽  
Perovskite Unit Cell

The microstructure of Ba(Cd1/3Ta2/3)O3 ceramics with boron additive was investigated by high-resolution and analytical electron microscopy. Superlattice reflections were present at positions of (h ± 1/3, k ± 1/3, l ± 1/3) away from the fundamental reflections in the [110] zone diffraction pattern for the pseudocubic perovskite unit cell. Lattice images showed a well-ordered structure with hexagonal symmetry. No boron segregation and amorphous phase was observed along grain boundaries. An amorphous phase rich in boron-oxide was observed to form pockets partially penetrating along multiple grain junctions.

Analytical ELectron Microscopy Characterization of Basalt Glass Ceramics

1982 ◽  
Vol 40 ◽  
pp. 616-617
Author(s):  
L. E. Thomas ◽  
L. A. Chick ◽  
R. O. Lokken
Keyword(s):  
Electron Microscopy ◽  
Analytical Electron Microscopy ◽  
Glass Ceramics ◽  
Ceramic Materials ◽  
Basalt Glass ◽  
Glass Ceramic Materials ◽  
Analytical Electron ◽  
Microscopy Characterization

Radioactive waste produced by nuclear reactors poses long term environmental hazards if not adequately immobilized and stored. As part of a program for developing basalt-based waste forms with high leach durability, analytical electron microscopy has been used to identify and chemically analyze the phases in several basalt glass/ceramic materials.

scholarly journals Combined Atom-Probe and Electron Microscopy Characterization of Fine Scale Structures in Aged Primary Coolant Pipe Stainless Steel

1986 ◽  
Vol 82 ◽  
Author(s):  
J. Bentley ◽  
M. K. Miller
Keyword(s):  
Electron Microscopy ◽  
Analytical Electron Microscopy ◽  
Atom Probe ◽  
Primary Coolant ◽  
Probe Field ◽  
Α Phase ◽  
Complementary Nature ◽  
Microscopy Characterization

ABSTRACTThe capabilities and complementary nature of atom probe field-ion microscopy (APFIM) and analytical electron microscopy (AEM) for the characterization of finescale microstructures are illustrated by examination of the changes that occur after long term thermal aging of cast CF 8 and CF 8M duplex stainless steels. In material aged at 300 or 400°C for up to 70,000 h, the ferrite had spinodally decomposed into a modulated fine-scaled interconnected network consisting of an iron-rich α′ phase and a chromium-enriched α phase with periodicities of between 2 and 9 nm. G-phase precipitates 2 to 10 nm in diameter were also observed in the ferrite at concentrations of more than 1021 m−3. The reported degradation in mechanical properties is most likely a consequence of the spinodal decomposition in the ferrite.

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