CAJ | 학술논문

通过传统陶瓷制备工艺制备了致密的SnO2-Zn2SnO4复合陶瓷，研究了不同SnO2、Zn2SnO4复合比例对陶瓷介电性质的影响及其高介电性质产生的机理。研究发现，40Hz时，该复合陶瓷的相对介电常数高达10^4，远高于SnO^2、Zn2SnO4陶瓷，且样品的相对介电常数、导纳随组分的变化规律一致。进一步研究发现，样品的电容随着施加偏压的变化满足肖特基势垒电容公式，这表明，SnO2-Zn2SnO4复合陶瓷的高介电行为起源于晶界处的双肖特基势垒。
통과전통도자제비공예제비료치밀적SnO2-Zn2SnO4복합도자，연구료불동SnO2、Zn2SnO4복합비례대도자개전성질적영향급기고개전성질산생적궤리。연구발현，40Hz시，해복합도자적상대개전상수고체10^4，원고우SnO^2、Zn2SnO4도자，차양품적상대개전상수、도납수조분적변화규률일치。진일보연구발현，양품적전용수착시가편압적변화만족초특기세루전용공식，저표명，SnO2-Zn2SnO4복합도자적고개전행위기원우정계처적쌍초특기세루。
Densified SnO2-Zn2SnO4 composite ceramics were prepared using traditional ceramic technology. Theeffect of Zn2 SnO4 contents on the dielectric properties of the composite ceramics was investigated, as well as the mechanism of high dielectric properties. Relative dielectric permittivity of 85 mol % SnO2 +15mol% Zn2 SnO4 ce- ramics reached 104 at 40Hz, which was much higher than that of SnO2 and Zn2SnO4 ceramics. The dielectricproperties and admittance varied with Zn2SnO4 content simultaneously and further investigations showed that the high dielectric permittivity of SnO2-Zn2SnO4 composite ceramics were originated from the double Schottky barrier at grain boundary.