摘要
制备Li_2CO_3-V_2O_5(LV)共掺杂0.6Mg_4Nb_2O_9-0.4SrTiO_3复合陶瓷,研究了LV掺杂对其烧结特性、相结构和微波介电性能的影响。结果表明:一定量LV掺杂使0.6Mg_4Nb_2O_9-0.4SrTiO_3复合陶瓷生成了Sr(NbTi)O_(3+δ)和MgO杂相,并使其致密化烧结温度降低(至1175℃);1.5%LV掺杂,在1175℃烧结5 h的样品具有较高的微波介电性能:τ_f=0.15 ppm/℃,ε_τ=20.1,Q·f=10240 GHz(at 8.5 GHz)。
The effects of Li2CO3-V2O5(LV) co-doped on the sinterability,phase compositions and microwave dielectric properties of 0.6Mg4Nb2O9-0.4SrTiO3 composite ceramics were investigated.It is found that the densification sintering temperature of 0.6Mg4Nb2O9-0.4SrTiO3 is lowed to 1175℃with an amount LV addtion.The second phases Sr(NbTi)O(3+δ) and MgO were confirmed by the XRD and EDX spectrum analysis.The specimens with 1.5%LV sintered at 1175℃for 5 h shows excellent dielectric propertis:εr=20.1,Q·f=10240 GHz(at 8.5 GHz),τf=0.15 ppm/℃.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2010年第4期444-448,共5页
Chinese Journal of Materials Research
基金
陕西省自然科学基金2009JM6001
陕西省教育厅09JK729资助项目~~