摘要
对 0 .64BaTi4 O9 0 .36BaEu2 Ti4 O12 /BaTi4 O9纤维复合陶瓷新材料的相组成、介电性能和样品表面原子的化学组成及Ti元素的价态变化进行了研究。研究结果表明 :该复合陶瓷新材料只由BaTi4 O9和BaEu2 Ti4 O12 两相组成。加入BaTi4 O9纤维后 ,复合陶瓷材料中Ti3 + 离子和Ti2 + 离子的含量降低 ,氧元素的含量提高 ,并且BaTi4 O9纤维对该材料体系的介质损耗有明显的改善作用 ,其中含 10vol%BaTi4 O9纤维的BET10试样的性能最佳 ,其εr=5 5 ,tgδ =3× 10 - 4(在 1MHz条件下 )。
The phase composition, dielectric properties, the chemical state of Ti element and abundance of the constituent elements on the sample surface were characterized. The results show that this system is composed of only two phases, i.e. BaTi 4O 9 and BaEu 2Ti 4O 12 . The content of Ti 3+ and Ti 2+ decrease and that of O element increases in this BET system composite ceramics due to the addition of BaTi 4O 9 fibers, which make the dielectric properties of this system improved greatly. BET10 sample, which has 10% BaTi 4O 9 fibers, has the best dielectric properties in this system, its ε r =55, tg δ =3×10 -4 (at 1MHz).
出处
《高技术通讯》
EI
CAS
CSCD
2002年第2期54-57,共4页
Chinese High Technology Letters