| 0.8 이상의 전기기계결합계수(k33)를 가지는 고효율 무연 압전 Ba(Ti0.94Zr0.06)O3 단결정 |
| 이종엽, 오현택, 이호용1 |
(주)세라콤
1선문대학교 신소재공학과 |
| "Lead-free" Piezoelectric Ba(Ti0.94Zr0.06)O3 Single Crystals with Electromechanical Coupling Factor (k33) Higher Than 0.8 |
| Jong-Yeb Lee, Hyun-Taek Oh, Ho-Yong Lee1 |
Ceracomp Co., Ltd.
1Department of Materials Science and Engineering, Sunmoon University |
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| ABSTRACT |
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Orthorhombic $Ba(Ti_{0.94}Zr_{0.06})O_3$ single crystals are fabricated using the cost-effective solid-state single crystal growth (SSCG) method; their dielectric and piezoelectric properties are also characterized. Measurements show that (001) $Ba(Ti_{0.94}Zr_{0.06})O_3$ single crystals have an electromechanical coupling factor ($k_{33}$) higher than 0.83, piezoelectric charge constant ($d_{33}$) of about 400 [pC/N], and piezoelectric voltage constant ($g_{33}$) higher than 50 [${times}10^{-3}Vm/N$]. The transition temperature ($T_{OT}$) of the (001) $Ba(Ti_{0.94}Zr_{0.06})O_3$ single crystals between orthorhombic and tetragonal phases is also observed to be about $61^{circ}C$. Because their electromechanical coupling factor ($k_{33}$) and piezoelectric voltage constant ($g_{33}$) are higher than those of soft PZT ceramics, it is expected that (001) $Ba(Ti_{0.94}Zr_{0.06})O_3$ single crystals can be used as "lead-free" piezoelectric materials in many piezoelectric applications. |
| Key words:
Piezoelectric, Lead-free, Single crystals, Electromechanical coupling factor |
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