CAJ | 학술논문

采用固相反应法制备了ZnO、Nb 2 O 5共掺杂Ba 0.2 Sr 0.8 TiO 3陶瓷材料，并用X射线衍射（XRD）和介电谱方法，分别对系列陶瓷样品的结构和复介电常数进行了测量.结果表明：1）Zn2+、Nb5+进入Ba 0.2 Sr 0.8 TiO 3晶格后仍然为钙钛矿型固溶体；2）Nb 2 O 5会使得材料的低温弥散相变过程转变为弛豫相变过程，并在300～360K区域内会出现新的弛豫过程；3）掺入一定量的ZnO后Nb2O5掺入降低了Ba 0.2 Sr 0.8 TiO 3陶瓷材料的介电常数，增大了其介电损耗.
채용고상반응법제비료ZnO、Nb 2 O 5공참잡Ba 0.2 Sr 0.8 TiO 3도자재료，병용X사선연사（XRD）화개전보방법，분별대계렬도자양품적결구화복개전상수진행료측량.결과표명：1）Zn2+、Nb5+진입Ba 0.2 Sr 0.8 TiO 3정격후잉연위개태광형고용체；2）Nb 2 O 5회사득재료적저온미산상변과정전변위이예상변과정，병재300～360K구역내회출현신적이예과정；3）참입일정량적ZnO후Nb2O5참입강저료Ba 0.2 Sr 0.8 TiO 3도자재료적개전상수，증대료기개전손모.
ZnO and Nb2O5 co-doped Ba0.2Sr0.8TiO3 ceramics were prepared by the method of solid state reaction. Crystalline structures and complex dielectric constant were measured by X-ray diffraction and dielectric spectra, respectively. The results show that:1) Zinc ions (Zn2+) and Niobium ion (Nb5+) enter the crystal lattice of Ba0.2Sr0.8TiO3 perovskite, and the ceramics have pure structure; 2) with the increase of Nb2O5 contents, the typical dispersion phase transition turns into the relaxation phase transition at low temperature, and a new relaxation processes has been found in the range of 300K-360K; 3) when doped certain amount of ZnO, the dielectric constant decreases and the dielectric loss increases at room temperature with the increasing of Nb 2 O 5 content.