การศึกษาโครงสร้างอะตอมเชิงลึกและการเปลี่ยนโครงสร้างเฟสที่มีต่อสมบัติ ไพอิโซอิเล็กทริกของเซรามิก (1-x)BNT-xBCST ด้วยใช้แสงซินโครตรอน และเทคนิครามาน สเปกโตรสโคปี

Chittakorn   Kronphom; Nathanan   Reabreang; Passanan   Sangsoda; Theerachai   Bongkarn; Pinit   Kidkhunthod

Authors

Chittakorn Kronphom Department of General Sciences and Physics, Faculty of Science and Technology, Chiang Mai Rajabhat University
Nathanan Reabreang Department of Environment Science, Faculty of Science and Technology, Chiang Mai Rajabhat University
Passanan Sangsoda Department of Environment Science, Faculty of Science and Technology, Chiang Mai Rajabhat University
Theerachai Bongkarn Department of Physics, Faculty of Science, Naresuan University
Pinit Kidkhunthod Synchrotron Light Research Institute (Public Organization)

Keywords:

(1-x)BNT-xBCST , solid state combustion technique , phase formation , local structure , piezoelectric property

Abstract

In this research, the study of the phase formation, the local atomic structure and phase transition on piezoelectric property of (1-x)BNT-xBCST solid solutions at various of x content prepared via the solid state combustion technique, using glycine as fuel, were studied. The study results, it was found that (1-x) BNT-xBCST ceramics exhibited a single perovskite structure with the co-existence of the rhombohedral and tetragonal phases. Then, it was observed that the concentration of BCST compound with increasing of x affected the Ti atom position which led to change phase formation. From the Raman spectroscopy result, it can be see that the Raman spectrum can confirmed the co-existence of the rhombohedral and tetragonal phases at x = 0.04. When x content over 0.04, the ceramics showed higher tetragonal phase. The piezoelectric coefficient (d₃₃) increases when x content increases up to 0.07 and then decreased. At x content of 0.07, the sample has the highest density (5.93 g / cm³) and the highest d₃₃(202 pC/N).

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