Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Richard G Geyer"'
Publikováno v:
Journal of Research of the National Institute of Standards and Technology
This paper discusses optimization techniques for the determination of complex permittivity and permeability in transmission lines. The traditional theoretical model using scattering parameters is extended into a mathematical regression model that can
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a2f5e0f4d0133a184a426597c899470
https://pubmed.ncbi.nlm.nih.gov/28184131
https://pubmed.ncbi.nlm.nih.gov/28184131
Publikováno v:
Journal of Applied Physics. 124:164104
High-frequency coaxial waveguide measurements are used to evaluate composition- and frequency-dependent complex permittivities and permeabilities of polycrystalline ferroelectric and ferrimagnetic ceramics. Material dielectric and magnetic property m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d560e2bfb8264bf1c0c8a9211eb7eb4d
https://doi.org/10.1063/1.5046428
https://doi.org/10.1063/1.5046428
Autor:
Eric E. Hoppenjans, John W. Halloran, Xun Gong, Wing Han She, Zachary N. Wing, William J. Chappell, Richard G. Geyer
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 53:3638-3647
In this paper, different densities within a ceramic are used to provide a wide continuous range of dielectric constants for high-frequency applications. Cofiring different ceramic materials together to make a single unified structure to obtain differ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::719e3c5a0f9cbc0c8f5fe4b0c47f684d
https://doi.org/10.1109/tmtt.2005.859039
https://doi.org/10.1109/tmtt.2005.859039
Publikováno v:
European Journal of Inorganic Chemistry. 2004:2434-2441
The crystal structure of Ba11FeTi27O66.5 was determined using single-crystal and powder X-ray diffraction methods. This phase crystallizes in the monoclinic space group C2/m (No. 12) (a = 23.324(1) A, b = 11.388(1) A, c = 9.8499(3) A, β = 90.104(3)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e14dbeace9b1cbca8c372ecdcfc9c7b
https://doi.org/10.1002/ejic.200300945
https://doi.org/10.1002/ejic.200300945
Publikováno v:
Journal of Applied Physics. 92:475-483
The influence of low concentration (1 mol %) Mg doping on the structural, microstructural, surface morphological, and dielectric properties of Ba1−xSrxTiO3 (BST) thin films has been measured and analyzed. The films were fabricated on MgO and Pt–S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60816968c5b062bfc0f1ce029e33608e
https://doi.org/10.1063/1.1484231
https://doi.org/10.1063/1.1484231
Autor:
James A. Kaduk, T.J. Haugan, Richard G. Geyer, L. J. Swartzendruber, H. J. Brown, Winnie Wong-Ng, Lawrence P. Cook
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 11:3305-3308
Aspects of the development of low-cost (Sr,Ca)/sub 3/Al/sub 2/O/sub 6/ dielectrics for Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+/spl delta// superconductor applications were investigated, A tie-line phase equilibrium relationship between Bi/sub 2/Sr/sub
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ec3dde59f099d02cbb5d5fcd23b9ca46
https://doi.org/10.1109/77.919769
https://doi.org/10.1109/77.919769
Publikováno v:
Journal of Solid State Chemistry. 156:122-134
In the present work the effects of cation ordering on dielectric properties were isolated by investigating three polymorphs of Ca(Ca1/3Nb2/3)O3 that feature different arrangements of the Ca2+ and Nb5+ cations on the B-sites of the perovskite structur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f43b56720842acf24d1a82b702e1359f
https://doi.org/10.1006/jssc.2000.8971
https://doi.org/10.1006/jssc.2000.8971
Autor:
Julia Y. Chan, J. M. Loezos, Richard G. Geyer, D. B. Minor, Robert S. Roth, Terrell A. Vanderah, L. D. Rotter, W. Febo
Publikováno v:
Journal of Solid State Chemistry. 155:78-85
Subsolidus phase equilibria in the CaO:Al 2 O 3 :Nb 2 O 5 system at 1325°C in air have been determined. One ternary phase forms, Ca 2 AlNbO 6 , which exhibits a perovskite-related structure with 1:1 or NaCl-type ordering of Al 3+ and Nb 5+ on the B
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6dec2ed7dc6c3756a5ad8e2382f126bf
https://doi.org/10.1006/jssc.2000.8894
https://doi.org/10.1006/jssc.2000.8894
Publikováno v:
International Journal of Inorganic Materials. 2:107-114
Subsolidus phase equilibria in the SrO–Al2O3–Nb2O5 system were determined by synthesis of 75 compositions in air in the temperature range 1200–1600°C. Phase assemblages were determined by X-ray powder diffraction at room temperature. Two new t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61bb701caaaebb958ef8b1b2d2018e80
https://doi.org/10.1016/s1466-6049(00)00014-3
https://doi.org/10.1016/s1466-6049(00)00014-3
Publikováno v:
Le Journal de Physique IV. :Pr9-113
We discuss the application of existing RF measurement techniques, including waveguide and mode-filtered cavity resonator methods, to the dielectric characterization of bulk high-permittivity ferroelectrics at microwave frequencies. Complex permittivi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e50cd73a5d5fff8ebfa0bf20f7757c6a
https://doi.org/10.1051/jp4:1998919
https://doi.org/10.1051/jp4:1998919