CAJ | 학술논문

通过固相烧结法制备了具有高介电常数的(Na1/2Nd1/2)TiO3微波介质陶瓷，研究了烧结温度对该陶瓷微观结构及微波介电性能的影响。结果表明，在烧结温度低于或等于1350℃时，所制陶瓷样品的主晶相为立方相的(Na1/2Nd1/2)TiO3；当烧结温度高于1350℃时，所制陶瓷样品的主晶相变为四方相的Nd0.667TiO3。陶瓷样品的相对介电常数和品质因数随着烧结温度的升高均先增大后减小，在烧结温度为1300℃时所制陶瓷样品最为致密，并具有最佳的微波介电性能，εr=110.06，Q×f=8147 GHz，τf=244.6×10–6/℃。
통과고상소결법제비료구유고개전상수적(Na1/2Nd1/2)TiO3미파개질도자，연구료소결온도대해도자미관결구급미파개전성능적영향。결과표명，재소결온도저우혹등우1350℃시，소제도자양품적주정상위립방상적(Na1/2Nd1/2)TiO3；당소결온도고우1350℃시，소제도자양품적주정상변위사방상적Nd0.667TiO3。도자양품적상대개전상수화품질인수수착소결온도적승고균선증대후감소，재소결온도위1300℃시소제도자양품최위치밀，병구유최가적미파개전성능，εr=110.06，Q×f=8147 GHz，τf=244.6×10–6/℃。
High dielectric constant microwave dielectric ceramic (Na1/2Nd1/2)TiO3 was prepared by solid-state reaction method. The effects of sintering temperature on the microstructure and microwave dielectric properties of the prepared samples were investigated. The results show that the major phase of sample is cubic (Na1/2Nd1/2)TiO3 when sintered below 1 350℃, and the major phase is turned to tetragonal Nd0.667TiO3 when sintered above 1 350℃. W ith the increase of sintering temperature, the relative perimittivity and quality factor of prepared ceramic first increase then decrease. The ceramic sintered at 1 300℃ is the densest and shows the optimum microwave dielectric properties ofεr=110.06, Q×f=8 147 GHz,τf=244.6×10–6/℃.