Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Jeffrey G. Nelson"'
Publikováno v:
Powder Diffraction. 8:194-197
Indexed experimental powder diffraction patterns of Tl,Pb-1223 and Tl-1223 are presented with a method of determining good cell parameters for the former awkward case where c/a almost exactly equals 4. For Tl,Pb-1223, a = 3.814±0.001 Å, c = 15.267
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee0382326ffab9b81c5347ed2281884e
https://doi.org/10.1017/s0885715600018182
https://doi.org/10.1017/s0885715600018182
Autor:
Jeffrey G. Nelson, J.T. Cheung, J.R. Oliver, I.S. Santha, Peter E. D. Morgan, K.R. Udayakumar, Ratnakar R. Neurgaonkar
Publikováno v:
Materials Research Bulletin. 28:719-727
The sol-gel technique has been used to produce highly grain-oriented perovskite PZT thin films on lattice-matched SBN:60, SrTiO 3 and MgO substrates. These films were deposited on both La 0.5 Sr 0.5 CoO 3 (LSC) laser ablated-coated and uncoated subst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d5bf6209ffac305c55ee0933757bebe
https://doi.org/10.1016/0025-5408(93)90115-t
https://doi.org/10.1016/0025-5408(93)90115-t
Publikováno v:
Journal of Intelligent Material Systems and Structures. 4:272-275
Perovskite PZT and PLZT ceramics have been hot- forged to densification > 98 % of their theoretical values. The piezoelectric d33 coefficient in the PLZT dense ceramics exceeds 650 pC/N compared to 550 pC/N for conventionally sintered ceramics. In ad
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8623e0bcefab1a2c6f2f3b6a93a42fa9
https://doi.org/10.1177/1045389x9300400217
https://doi.org/10.1177/1045389x9300400217
Publikováno v:
Materials Research Bulletin. 27:677-684
Ferroelectric compositions based on the chemical formula M 2+ 6 M 4+ 2 Nb 8 O 30 , where M 2+ = Ba, Sr or Ca and M 4+ = Ti, Sn or Zr, have been synthesized and their characteristics have been compared with the results of earlier work. X-ray diffracti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e69e628b9d7628eb948a115027e1087
https://doi.org/10.1016/0025-5408(92)90074-a
https://doi.org/10.1016/0025-5408(92)90074-a
Publikováno v:
Materials Research Bulletin. 25:959-970
The K2Ln3+Nb5O15 system has been investigated for a range of rare-earth ions (La3+ to Ho3+, Y3+). The temperature-dependent dielectric properties indicate that all but the La3+-containing materials have a tungsten bronze orthorhombic structure. Two p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::781dbd257cde2c46b0e2b89ab191677d
https://doi.org/10.1016/0025-5408(90)90002-j
https://doi.org/10.1016/0025-5408(90)90002-j
Autor:
Charles R. Larson, Eric Falangas, Melvin Weiss, Ratnakar R. Neurgoankar, Jeffrey G. Nelson, Joseph S. Rosenthal, Demetrious G. Zaferis, Stephen F. McGrath
Publikováno v:
Adaptive Structures and Material Systems.
Piezoceramic actuators have been utilized in many laboratory tests to provide a means of actively damping structural vibration; but have not, up till now, been applied to a high performance operational aircraft. This paper describes a program which a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a873c8840a28e39f806abf68d5aec6f5
https://doi.org/10.1115/imece1998-0949
https://doi.org/10.1115/imece1998-0949
Autor:
Lynn E. Lowry, Patcharin Poosanaas, Jeffrey G. Nelson, Sarita Thakoor, John Michael Morookian, Kenji Uchino, Ratnakar R. Neurgaonkar, Neville I. Marzwell, Andre Yavrouian
Publikováno v:
SPIE Proceedings.
Optically/electrically operable flexible film microactuators that can offer up to two orders high efficiency of photonic to mechanical conversion compared to ceramic actuators are conceptualized. A polarized ceramic wafer of non- centrosymmetric pero
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dff4ecd6010d6a31f45182c1a4c2a4de
https://doi.org/10.1117/12.320191
https://doi.org/10.1117/12.320191
Autor:
Stephen F. McGrath, Charles R. Larson, Cindy L. Hustedde, Joseph S. Rosenthal, Jeffrey G. Nelson, Ratnakar R. Neurgaonkar, Steven K. Dobbs, Eric Falanges
Publikováno v:
Smart Structures and Materials 1998: Industrial and Commercial Applications of Smart Structures Technologies.
An active vibration suppression system (AVSS) was designed and flight tested on a B-1B aircraft aft fuselage skin panel subjected to engine noise and unsteady flow induced vibrations. This was the first time an AVSS was successfully demonstrated in f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c2122a52c1ce4a46238f263f2e0b3ab
https://doi.org/10.1117/12.310644
https://doi.org/10.1117/12.310644
Publikováno v:
SPIE Proceedings.
The sol-gel technique has been used to produce perovskite PZT thin films on lattice-matched SBN:60 and LaAlO3 substrates. These films were spin-coated and then annealed in the range of 500-700 degrees C in an oxygen atmosphere. Highly grain oriented
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41e21ed2b1404acfac791c1973a7e57a
https://doi.org/10.1117/12.271434
https://doi.org/10.1117/12.271434
Publikováno v:
MRS Proceedings. 392
Ferroelectric morphotropic phase boundary (MPB) materials based on Pb2+ - containing compositions are potentially important for optical and electronic applications because they exhibit high switchable polarization near this boundary with superior ele
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d135e52e53b5e390e2cb0352678582c
https://doi.org/10.1557/proc-392-165
https://doi.org/10.1557/proc-392-165