Crystal Growth of Ca(3)Nb(Ga(1−x)Al(x))(3)Si(2)O(14) Piezoelectric Single Crystals with Various Al Concentrations

Ca(3)Nb(Ga(1−x)Al(x))(3)Si(2)O(14) (CNGAS) single crystals with various Al concentrations were grown by a micro-pulling-down (µ-PD) method and their crystal structures, chemical compositions, crystallinities were investigated. CNGAS crystals with x = 0.2, 0.4 and 0.6 indicated a single phase of lang...

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Detalles Bibliográficos
Autores principales: Yokota, Yuui, Kudo, Tetsuo, Ohashi, Yuji, Medvedev, Andrey, Kurosawa, Shunsuke, Kamada, Kei, Yoshikawa, Akira
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2015
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5512616/
https://www.ncbi.nlm.nih.gov/pubmed/28793525
http://dx.doi.org/10.3390/ma8095264
Descripción
Sumario:Ca(3)Nb(Ga(1−x)Al(x))(3)Si(2)O(14) (CNGAS) single crystals with various Al concentrations were grown by a micro-pulling-down (µ-PD) method and their crystal structures, chemical compositions, crystallinities were investigated. CNGAS crystals with x = 0.2, 0.4 and 0.6 indicated a single phase of langasite-type structure without any secondary phases. In contrast, the crystals with x = 0.8 and 1 included some secondary phases in addition to the langasite-type phase. Lattice parameters, a- and c-axes lengths, of the langasite-type phase systematically decreased with an increase of Al concentration. The results of chemical composition analysis revealed that the actual Al concentrations in as-grown crystals were almost consistent with the nominal compositions. In addition, there was no large segregation of each cation along the growth direction.

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