Current status and prospects of lead-free piezoelectric ceramics
Current status and prospects of lead-free piezoelectric ceramics
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DOI：
10.1016/j.jeurceramsoc.2005.03.125
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发表时间：
2005-01-01
影响因子：
5.7
通讯作者：
Nagata, H
中科院分区：
文献类型：
--
作者：
Takenaka, T;Nagata, H
钙钛矿型铁电陶瓷和铋层状铁电（BLSF）陶瓷具有良好的介电、铁电和压电性能，是无铅压电材料的上级候选材料，可减少环境污染。Percent型陶瓷似乎适用于需要大压电常数d（33）（> 300 pC/N）和高居里温度T-c（> 200 ℃）的致动器和高功率应用。对于BaTiO_3（BT）基固溶体，即（1 - x）BaTiO_3- x（Bi_（0.5）K_（0.5））TiO_3 [BTBK -100 x]陶瓷，随着x含量的增加，Tc增加。BTBK-20 + MnCO 3 0.1重量%陶瓷显示出高于200摄氏度的高T和机电耦合系数k（33）= 0.35。在（Bi 1/2Na 1/2）TiO 3- bBaTiO（3）- c（Bi 1/2K 1/2）TiO 3 [BNBK（100 a/100 b/100 c）]固溶体陶瓷的情况下，BNBK（85.2/2.8/12）的d（33）和T-c分别为191 pC/N和301 ℃。另一方面，BLSF陶瓷似乎是作为高温压电传感器和具有高机械品质因数和低谐振频率温度系数（TC-f（r））的陶瓷谐振器的优秀候选者。施主掺杂的Bi 4 Ti 3 O 12陶瓷如Bi 4 Ti 3-xNbxO 12 [BITN-x]和Bi 4 Ti 3-xO 12 [BITV-x]显示出高于650 ℃的高T-c。晶粒取向（HF）BITN-0.08陶瓷的k（33）值为0.39，并且能够在高达350 ℃的温度下保持相同的值。Bi 3 TiTaO 9（BTT）基固溶体Srx-1Bi 4-xTi 2-xTaxO 9 [SBTT 2（x）]（1
Dielectric, ferroelectric and piezoelectric properties of perovskite ferroelectric and bismuth layer-structured ferroelectric (BLSF) ceramics are described as superior candidates for lead-free piezoelectric materials to reduce environmental damages. Perovskite type ceramics seem to be suitable for actuator and high power applications that are required a large piezoelectric constant, d(33) (> 300 pC/N) and a high Curie temperature, T-c (> 200 degrees C). For BaTiO3 (BT)-based solid solutions, that is, (1 - x)BaTiO3 - x(Bi0.5K0.5)TiO3 [BTBK - 100x] ceramics, the T-c increases with increasing the amount of x. BTBK-20 + MnCO3 0.1 wt.% ceramic shows the high T, than 200 degrees C and the electromechanical coupling factor, k(33) = 0.35. In the case of a(Bi1/2Na1/2)TiO3 - bBaTiO(3) - c(Bi1/2K1/2)TiO3 [BNBK (100a/100b/100c)] solid solution ceramics, the d(33) and T-c are 191 pC/N and 301 degrees C for the BNBK (85.2/2.8/12), respectively. On the other hand, BLSF ceramics seem to be excellent candidates as piezoelectric sensors for high temperatures and ceramic resonators with high mechanical quality factor and low temperature coefficient of resonance frequency (TC-f(r)). Donor-doped Bi4Ti3O12 ceramics such as Bi4Ti3-xNbxO12 [BITN-x] and Bi4Ti3-xO12 [BITV-x] show high T-c than 650 degrees C. The k(33) value of the grain-oriented (HF) BITN-0.08 ceramic is 0.39 and is able to keep the same value up to 350 degrees C. Bi3TiTaO9 (BTT)-based solid solution system, Srx-1Bi4-xTi2-xTaxO9 [SBTT2(x)] (1