Zobrazeno 1 - 10 of 92 pro vyhledávání: '"W. Wersing"'
1
Properties of undoped and MgO-doped LiNbO3; correlation to the defect structure
Autor: W. Wersing, B.C. Grabmaier, W. Koestler
Publikováno v: Journal of Crystal Growth. 110:339-347
A series of LiNbO3 crystals were grown with different Li/Nb ratios and a MgO doping up to 8 mol%. The lattice constants, the permittivities, the elastic compliances, the piezoelectric constants, the birefringence and the pyroelectric coefficient were
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ce03275fd275fff6062b333515dfa4ad
https://doi.org/10.1016/0022-0248(91)90269-b
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6
Sol-Gel Synthesis of Advanced Microwave Ceramics and their Dielectric Properties
Autor: M. Schnoeller, W. Wersing
Today, highly dielectric ceramics are frequently employed for miniaturizing passive microwave components. Ceramics of the systems Zr x Ti y Sn z O 4 (ZTS) with e r ≈ 40 are standardly used in the form of dielectric resonators and highly dielectric
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fd7f79d13a27aa779fe9d4a3c7b77ed1
https://doi.org/10.1016/b978-0-444-89344-4.50031-8
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7
The influence of internal voids with 3–1 connectivity on the properties of piezoelectric ceramics prepared by a new planar process
Autor: W. Wersing, U. Bast
Publikováno v: Ferroelectrics. 94:229-242
Using resonance measurements, the material properties of lead zirconate titanate samples with evenly spaced (anisotropic) internal voids were investigated. Ceramic/air-composites with 3–1 connectivity (0–15% voids) were produced using a new multi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ad3dced534a0bcb9bbc981657546359a
https://doi.org/10.1080/00150198908014258
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8
Principles of piezoelectric ceramics for mechanical filters
Autor: H. Thomann, W. Wersing
Publikováno v: Ferroelectrics. 40:189-202
Piezoelectric ceramics are prepared for fabricating the electromechanical transducers used in the mechanical frequency filters that find application in long-haul communications systems. These ceramics have to satisfy specifications that can only be m
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c770c3bc01a268feb65c24da22b2d17f
https://doi.org/10.1080/00150198208218169
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9
Temperature coefficient of resonance frequencies and permittivity in PZT ceramics near the morphotropic phase boundary
Autor: W. Wersing
Publikováno v: Ferroelectrics. 37:611-614
The temperature coefficient peak of the frequency constant TCF of tetragonal PZT ceramics allows their preparation with tight TCF tolerances. It is shown how the TCF peak can be set to the desired value by modifying the ceramic material with dopants.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::99b093da108a7592bf60b4215f65b35b
https://doi.org/10.1080/00150198108223498
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10
Low-Q PZT ceramics
Autor: W. Wersing
Publikováno v: Ferroelectrics. 26:783-786
PZT ceramics are presented which, like PbNb206, have very low mechanical Q values and therefore are suitable for wideband ultrasonic transducers. Compared with PbNb206 they afford the advantage that they are five times more efficient. The high intern
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b0bc048be6fc5c6dd51abd0938b1cdd2
https://doi.org/10.1080/00150198008008171
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