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本文对YBFO体系掺杂Ca,获得(Y1-xCax)Ba2Fe3O8+w(YCBFO,x=0,0.05,0.10,0.20)相,通过X射线粉末衍射、扫描电子显微镜等方法,研究YBFO体系内掺入Ca之后,对YBFO的晶体结构、晶胞参数等方面的影响.研究结果表明:对YBFO体系内掺Ca,Ca进入Y位,是空穴型掺杂,这种掺杂并不改变YBFO的P4/mmm空间群的四方晶系结构,仅使其晶胞参数a、c减小.其中,a减少的原因是Fe(2)-O2及Fe(1)-O3键矩的缩短,而c减少的原因是系统内氧的减少.
In this paper, the YBFO system was doped with Ca, and the YBFO system was doped with (Y1-xCax) Ba2Fe3O8 + w (YCBFO, x = 0,0.05,0.10,0.20) by X-ray powder diffraction and scanning electron microscopy Ca, the crystal structure of YBFO, unit cell parameters and other aspects.The results show that: YBFO system doped Ca, Ca into the Y-bit, is a hole-type doping, this doping does not change the YBFO P4 / mmm space group, only the unit cell parameters a and c decrease, among them, the decrease of a is due to the shortening of the bond moment of Fe (2) -O2 and Fe (1) -O3 and the decrease of c The reason is the reduction of oxygen in the system.