CAJ | 학술논문

研究了(Bi2-xZnx)(Ti2-xNbx)O7(0.4≤x≤1.0)陶瓷材料的结构与介电性能.X-射线衍射结果表明,该组分体系在950～1 100 ℃烧结,可得到单相立方焦绿石结构陶瓷.扫描电子显微镜观察样品形貌发现,x越大,晶粒尺寸越大.室温介电性能的测试表明,在1 MHz条件下,随x值的增大,介电常数从218下降到122,损耗为(1～4)×10-4.介电温谱测试发现,该组分体系在低温下出现明显的介电弛豫峰,峰形随x增大逐渐宽化.微波特性的测试表明,在谐振频率2～3 GHz,样品的品质因数与谐振频率之积Q×f为112～158 GHz.
연구료(Bi2-xZnx)(Ti2-xNbx)O7(0.4≤x≤1.0)도자재료적결구여개전성능.X-사선연사결과표명,해조분체계재950～1 100 ℃소결,가득도단상립방초록석결구도자.소묘전자현미경관찰양품형모발현,x월대,정립척촌월대.실온개전성능적측시표명,재1 MHz조건하,수x치적증대,개전상수종218하강도122,손모위(1～4)×10-4.개전온보측시발현,해조분체계재저온하출현명현적개전이예봉,봉형수x증대축점관화.미파특성적측시표명,재해진빈솔2～3 GHz,양품적품질인수여해진빈솔지적Q×f위112～158 GHz.
The structure and dielectric properties of (Bi2-xZnx)(Ti2-xNbx)O7(0.4≤x≤1.0) ceramics were investigated. All samples sintered at 950～1 100 ℃ exhibit a single cubic pyrochlore structure according to X-ray diffraction analysis. Scanning electron microscope micrographs indicate that the grain size increases with the increase of x value. The dielectric properties tests at room temperature show that the dielectric constant at 1 MHz decreases from 218 to 122 with the increase of x value and the dielectric loss remains in the level of (1～4)×10-4. Dielectric temperature spectra reveal that all compositions show a typical dielectric relaxation behavior and the dielectric peak flattens with the increase of x value. The product of quality factor and frequency (Q×f ) is in the range of 112～158 GHz at the resonant frequency of 2～3 GHz by microwave characteristic tests.