CAJ | 학술논문

在钛酸锶钡（BSTO）与质量分数为55％的MgO混合的基础上，进行了Al2O3掺杂的系统研究．随Al2O3掺入量的增加，BSTO／MgO材料的介电常数减小明显，损耗先减少后增多，调谐性先增大后减小，但过量的Al2O3掺杂使得材料的调谐性降低．当A1203掺杂量为mol（Al2O3）=O．5％时，介电损耗达到最小，为2．0×10。（10KHz），介电常数调谐性达14．1％（4kV／mm）．利用电介质理论分析了Al2O3对BST／MgO材料介电性质的改性机理．
재태산송패（BSTO）여질량분수위55％적MgO혼합적기출상，진행료Al2O3참잡적계통연구．수Al2O3참입량적증가，BSTO／MgO재료적개전상수감소명현，손모선감소후증다，조해성선증대후감소，단과량적Al2O3참잡사득재료적조해성강저．당A1203참잡량위mol（Al2O3）=O．5％시，개전손모체도최소，위2．0×10。（10KHz），개전상수조해성체14．1％（4kV／mm）．이용전개질이론분석료Al2O3대BST／MgO재료개전성질적개성궤리．
Based on w （MgO） = 55 % magnesia mixed with Ba0.55 Sr0.45TiO3 （BSTO） , the influence of Al2O3 dopant on the dielectric properties of BSTO/MgO was investigated. With the increase of the quality of Al2O3 dopant , the dielectric constant of BSTO/MgO material reduced , the loss tangents decreased first and then in- creased,and tunability first increased then decreased , but excess quantity of Al2O3 would lower tunability. When the quantity of Al2O3 was mol （ A1203 ） = 0.5% , the dielectric loss of BST/MgO material achieved minimum , which was equal to 2.0 × 10-3 （10KHz） , and the dielectric constant tunability 14.1% （4kV/ mm） could be obtained. By virtue of the theory of dielectric , the mechanism on the influence of Al2O3 dopant on the dielectric properties of BST/MgO was analysed.