Effect of Li2O addition on sintering and piezoelectric properties of (Ba, Ca)(Ti, Sn)O3 lead-free piezoceramics temperature
Effect of Li2O addition on sintering and piezoelectric properties of (Ba, Ca)(Ti, Sn)O3 lead-free piezoceramics temperature
复制标题
Li2O添加对(Ba,Ca)(Ti,Sn)O-3无铅压电陶瓷烧结及压电性能的影响
DOI：
10.1016/j.jeurceramsoc.2014.08.042
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发表时间：
2015
影响因子：
5.7
通讯作者：
Jing-Feng Li
中科院分区：
文献类型：
--
作者：
Lei Zhao;Bo-Ping Zhang;Peng-Fei Zhou;Li-Feng Zhu;Jing-Feng Li
这项工作研究了 (Ba0.95Ca0.05)(Ti0.90Sn0.10)O3-xLi2O (BCTSLix,x= 0、1、2、3、4、5 和 6 mol%) 无铅压电陶瓷受益于 Li2O 添加的增强烧结和电性能。通过添加少量的 Li2O，在降低的烧结温度下制备了具有良好压电性能的高致密 BCTS 陶瓷。研究发现，在烧结初期，烧结致密化主要是由反应液相促进的，氧空位的形成应作为一个额外因素予以考虑。对于所有其他添加 Li2O 的样品，在−50°C 至 40°C 温度范围（asx=2）和室温下的拉曼光谱证实了 R 和 T 相的共存，而它们的 R 与 T 相的比值随着 Li2O 添加量的增加而减小。当添加 4 mol% Li2O 时，获得了 d33= 457 pC/N、kp= 25.18% 和 Qm= 491 的更好性能，这主要归因于适当的 R 与 T 相比，因为 3 ≤ x ≤ 6 时样品的晶粒尺寸和密度相似。
This work investigated the enhanced sintering and electrical properties of (Ba0.95Ca0.05)(Ti0.90Sn0.10)O3-xLi2O (BCTSLix,x= 0, 1, 2, 3, 4, 5 and 6 mol%) lead-free piezoelectric ceramics benefiting from the Li2O addition. Highly dense BCTS ceramics with good piezoelectric properties were fabricated at reduced sintering temperatures by adding a small amount of Li2O. It was found that the sintering densification is promoted mainly by reaction liquid phase at the early sintering stage and the formation of oxygen vacancies should be considered as an additional factor. The coexistence ofRandTphases was confirmed by the Raman spectrum at a temperature range from−50 °C to 40 °C asx= 2 and at room temperature for all other Li2O added samples, while their specific ratio ofRtoTphase decreases with increasing Li2O addition. Better properties withd33= 457 pC/N,kp= 25.18% andQm= 491 were obtained when adding 4 mol% Li2O, which are attributed dominantly to the appropriate specific ratio ofRtoTphase because of the similar grain size and density for samples at 3 ≤x≤ 6.