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对自制的低功耗Mn-Zn铁氧体样品,用穆斯堡尔谱研究了其结构和预烧过程中的相变情况,得出以下结论:(1)高温烧结样品是含过量铁的Mn-Zn铁氧体,有较典型的穆斯堡尔参数,其分子式可写为Mn_(0.70),Zn_(。.23)Fe_(2.07)O_4;(2)在预烧过程中出现的双线子谱面积随相变进程有特征变化,可作为相变进程的标识;(3)在预烧温度1040℃下,已初步达到形成Mn-Zn铁氧体的相变前期;(4)预烧过程中升温中断或在较低温度下反复预烧不利于正常相变;(5)原料Fe_2O_3穆斯堡尔参数比较特殊,对预烧样品谱有明显影响,但对高温烧结样品影响不显著。
The homemade low-power Mn-Zn ferrite samples were investigated by Mossbauer spectroscopy for the structure and phase transformation during the calcination. The following conclusions were drawn: (1) Mn-Zn ferrite with typical Mossbauer parameters, the formula can be written as Mn 0.70, Zn 23.7 Fe 2.07 O 4; (2) The presence of bis (3) At the pre-calcination temperature of 1040 ℃, the phase transition of Mn-Zn ferrite has been preliminarily achieved; (4) The pre-calcination temperature (5) The Mossbauer parameters of raw Fe_2O_3 are rather special, which have obvious influence on the spectrum of calcined samples, but have no significant effect on the high-temperature sintered samples .