Zobrazeno 1 - 10
of 18
pro vyhledávání: '"R. D. Roseman"'
Autor:
Niloy Mukherjee, R. D. Roseman
Publikováno v:
Journal of Electroceramics. 10:117-135
Extensive microstructural and structure-property studies on donor doped barium titanate have revealed that the PTCR phenomenon is strongly controlled by the density, number of grain boundaries available to conduction, domain orientation and grain bou
Autor:
R. D. Roseman, Niloy Mukherjee
Publikováno v:
Ferroelectrics. 281:19-34
Barium titanate positive temperature coefficient of resistivity (PTCR) ceramics are widely used in the electrical device industry. It is known that the PTCR effect shows a voltage sensitivity similar to voltage-dependent resistors. However, the micro
Publikováno v:
Journal of Biomedical Materials Research. 53:181-187
A better understanding of the fundamental phenomena occurring in both the healthy and the artificially stimulated cochlea will greatly aid in the engineering of more effective cochlear implant devices and will, in general, enhance mankind's knowledge
Autor:
Gaosheng Liu, R. D. Roseman
Publikováno v:
Journal of Materials Science Letters. 18:1875-1878
Autor:
R. D. Roseman, Gaosheng Liu
Publikováno v:
Ferroelectrics. 221:181-185
A high temperature NTC resistivity transition (Tc2) near 600°C has been found in donor-modified BaTiO3. Thermal treatment near Tc2 on developed PTCR materials significantly affects the resistivity (lowering the Prt and increasing the resistivity tra
Autor:
Gaosheng Liu, R. D. Roseman
Publikováno v:
Journal of Materials Science. 34:4439-4445
The influence of Ba-excess and liquid phase sintering with SiO2 on the electrical conduction and microstructure in PTCR BaTiO3 has been investigated. Dense (95–96%), small grain (5–10 μm) PTCR materials were obtained in Ba-excess (Ba/Ti = 1.006)
Autor:
R. D. Roseman
Publikováno v:
Ferroelectrics. 215:31-45
A high temperature NTC resistivity transition (T c2) near 600°C has been found in donor modified barium titanate (BaTiO3). Thermal treatment around this temperature regime plus applied voltage (T c2-Poling) on previously developed PTCR materials sig
Publikováno v:
Ferroelectrics. 177:273-282
In this study, in situ transmission electron microscopy studies were used to examine and characterize domain formation and phase transformation mechanisms in donor doped, PTCR BaTiO3 materials. A significant and abrupt change in resistivity occurs as
Publikováno v:
Ferroelectrics. 177:255-271
The relationship between domain morphology, grain boundary structure, dopant distribution and the effect on conductivity in lightly donor doped barium titanate was characterized using SEM and TEM. The compositional distribution and the structural rel
Autor:
R. D. Roseman, Srinivas Subramaniam
Publikováno v:
Characterization and Modeling to Control Sintered Ceramic Microstructures and Properties
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9766faf8b2b9304342ca6b0f282ee503
https://doi.org/10.1002/9781118407080.ch11
https://doi.org/10.1002/9781118407080.ch11