CAJ | 학술논문

用溶胶-凝胶法制备了稀土Gd掺杂钛酸钡材料.用X射线衍射、Raman光谱及矢量网路分析仪对样品的结构、晶粒尺寸、晶格参数和电磁参数进行了测量和分析.结果表明:所有的粉末样品具有四方相结构,且具有良好的微波吸收性能.与纯钛酸钡相比,晶格常数a增加,晶格常数c减小,晶粒尺寸减小,反射率峰位发生蓝移,且反射率峰强明显降低,频带宽度拓宽了2倍.因此,稀土Gd掺杂有利于改善钛酸钡材料微波吸收性能.
용용효-응효법제비료희토Gd참잡태산패재료.용X사선연사、Raman광보급시량망로분석의대양품적결구、정립척촌、정격삼수화전자삼수진행료측량화분석.결과표명:소유적분말양품구유사방상결구,차구유량호적미파흡수성능.여순태산패상비,정격상수a증가,정격상수c감소,정립척촌감소,반사솔봉위발생람이,차반사솔봉강명현강저,빈대관도탁관료2배.인차,희토Gd참잡유리우개선태산패재료미파흡수성능.
Nano-size powder of Gd doped BaTiO3 was prepared by sol-gel method. The structure, crystalline size, lattice constants and electromagnetic parameters were investigated by X-ray diffraction, Raman spectroscopy and vector network analyzer. The results indicate that a single tetragonal phase powder with an excellent microwave absorption property is formed. Gd doping can enlarge lattice constant a, and decrease lattice constant c and crystalline size of the materials. Also the reflection intensity of the peaks de-creases, peak positions move to higher frequency and bandwidth widens two times for the BaTiO3 contained 0.2% Gd compared with undoped BaTiO3 powder. It means that the doping of Gd ions can greatly improve the microwave absorption properties of the material.