Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Jan Sauerwald"'
Publikováno v:
Solid State Ionics. 184:78-82
High temperature stable piezoelectric crystals open a wide range of new sensor applications due to the ability to monitor environmentally dependent mechanical properties of sensor films deposited onto piezoelectric resonators. An understanding of the
Publikováno v:
physica status solidi (a). 208:390-403
Langasite single crystals show piezoelectrically excited bulk acoustic waves up to 1470 °C and are, therefore, used to prepare high-temperature functional components such as membranes, cantilevers and field emission tips. The underlying concept incl
Publikováno v:
Integrated Ferroelectrics. 115:41-56
To satisfy demands for in-situ monitoring of high-temperature processes, ever more sophisticated sensors are required. Advances in achieving improved sensitivity and selectivity are expected from miniaturization and integration of active electronic c
Publikováno v:
physica status solidi (a). 208:377-389
Piezoelectrically actuated plano-convex thickness shear mode (TSM) resonators in lanthanum gallium silicate (langasite, LGS, La3Ga5SiO14) were fabricated. For the fabrication of the devices different micromachining technologies were investigated. Fin
Publikováno v:
ECS Transactions. 25:135-146
The high-temperature stability of the single crystalline piezoelec-tric material langasite and associated transport phenomena such as the diffusion of the constituents gallium and oxygen are investi-gated. Small structures remain their shape upon ann
Publikováno v:
Ionics. 15:157-161
Langasite and gallium phosphate are shown to exhibit piezoelectrically stimulated bulk acoustic waves up to at least 1,400 and 900 °C, respectively. Most critical issues are stoichiometry changes due to, e.g. low oxygen partial pressures, and high l
Publikováno v:
Solid State Ionics. 179:928-931
Doping of langasite is performed in order to create monolithic structure components such as electrodes. In order to control the process, the diffusion coefficients of praseodymium, strontium and niobium are determined. An increase of the doping depth
Publikováno v:
Journal of Electroceramics. 22:180-184
The availability of large size langasite (La3Ga5SiO14) wafers enables micromachining of this high-temperature stable piezoelectric material which has been shown to exhibit bulk oscillations at temperatures of up to at least 1400 °C. In particular, t
Publikováno v:
Sensors and Actuators A: Physical. 132:271-277
A piezoelectrically actuated array of cantilever beams in lanthanum gallium silicate (langasite, La 3 Ga 5 SiO 14 ) was designed and fabricated. Langasite is a new piezoelectric material with promising properties for micro-electromechanical applicati
Publikováno v:
Sensors and Actuators A: Physical. :393-396
Lanthanum gallium silicate (langasite, La 3 Ga 5 SiO 14 ) is a piezoelectric material with promising properties for micro-electromechanical applications at high temperatures. So far it has been used for SAW and BAW devices. This paper reports on the