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http://dx.doi.org/10.4313/JKEM.2009.22.3.205

Piezoelectric and Dielectric Properties of NaNbO3-LiNbO3 Ceramics according to the BaTiO3 Substitution  

Lee, Sang-Ho (세명대학교 전기공학과)
Yoo, Ju-Hyun (세명대학교 전기공학과)
Mah, Suk-Burm (용인송담대학 조명인테리어과)
Kim, Seang-Goo (삼성전자 반도체총괄)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.22, no.3, 2009 , pp. 205-209 More about this Journal
Abstract
In this study, in order to develop the composition ceramics for lead-free ultrasonic motor, (1-x-0.09)$NaNbO_{3-x}BaTiO_3-0,09LiNbO_3$ ceramics were fabricated using a conventional mixed oxide process and their piezoelectric and dielectric characteristics were investigated according to the $BaTiO_3$ substitution. All the specimens showed orthorhombic phase structure without secondary phase, $BaTiO_3$ substitution enhanced density, dielectric constant(${\epsilon}_r$) and electromechanical coupling factor($k_p$), However, mechanical quality factor was deteriorated. Curie temperature of specimens was observed as about $380^{\circ}C$. At the $BaTiO_3$ substitution of 4 mol%, density, electromechanical coupling factor($k_p$), dielectric constant(${\epsilon}_r$) and piezoelectric constant($d_{33}$) of specimen showed the optimum value of $4.493g/cm^3$, 0.236, 175, 70 pC/N, respectively.
Keywords
Lead-free; Electromechanical coupling factor($k_p$); Dielectric constant(${\epsilon}_r$); Piezoelectric constant($d_{33}$);
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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