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Materials of the langasite family are of current interest for both Bulk Acoustic Wave and Surface Acoustic Wave devices. In particular, they could be promising solutions to Frequency and Time applications due to their g/product, two to three times higher than for the quartz crystal [1]. We have shown that this encouraging result is strongly linked to the crystal quality [2] and to the post thermal...
This article reports analyzes on a specific quartz crystal block supplied for a specific program on 1/f noise of quartz crystal resonator. This kind of synthetic crystal is usually used to growth new generation of quartz crystal blocks. Description of the blanks realization is presented. Inclusions detection by optical methods are studied. FTIR Spectrometry for mapping alpha values and ICP-MS measurements...
The Ge–Te system exhibits one main composition domain where glasses can be easily prepared by melt quenching technique; this domain is centered on the eutectic composition Ge 15 Te 85 . In this work, bulk flakes and films of composition Ge x Te 100−x with x⩽50at.% were prepared by two different quenching techniques: (i) the twin roller quenching for bulk flakes...
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