不同形貌钛酸钡通过将氧化钛前驱体球和钡盐在碱性条件下进行水热和高温烧结制备出来,其与石蜡混合物(75 wt％)在12 GHz微波频率附近发生了介电共振现象.由于钛酸钡是晶格常数降低的顺电立方相/四方相,发生原因是电致伸缩/逆压电效应产生的弹性纵波在晶粒内部的共振吸收.不同条件制备钛酸钡晶粒尺寸(219 nm)趋于一致,共振频率相近,经过110℃水热和1100℃烧结制备的鹿角形状钛酸钡晶粒较大(657 nm)并且相互联接使得共振加强.本工作证明了通过改变钛酸钡晶粒尺寸和形貌从而改变微波介电性能.
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