CAJ | 학술논문

以Fe(NO_3)_3·9H_2O与Zn(NO_3)_2·6H_2O为原料, 与适量的柠檬酸配制成溶液, 采用溶胶-凝胶(sol-gel)法合成干凝胶前驱体, 将前驱体在空气及氩气气氛中烧结得到Zn_(1-x)Fe_xO样品, 并用X射线衍射(XRD)、透射电子显微镜(TEM)、 X射线光电子能谱(XPS)和振动样品磁强计(VSM)对所制备样品的结构和磁性进行研究. 结果表明, 在氩气中烧结时, Fe在ZnO中的掺杂摩尔分数小于4%, 在空气中烧结时, Fe在ZnO中的掺杂摩尔分数约为10%, 在两种气氛下制备相同掺杂摩尔分数样品的磁性不同, 是由于Fe在样品中所处的价态不同, 从而影响了样品的结构及磁性.
이Fe(NO_3)_3·9H_2O여Zn(NO_3)_2·6H_2O위원료, 여괄량적저몽산배제성용액, 채용용효-응효(sol-gel)법합성간응효전구체, 장전구체재공기급아기기분중소결득도Zn_(1-x)Fe_xO양품, 병용X사선연사(XRD)、투사전자현미경(TEM)、 X사선광전자능보(XPS)화진동양품자강계(VSM)대소제비양품적결구화자성진행연구. 결과표명, 재아기중소결시, Fe재ZnO중적참잡마이분수소우4%, 재공기중소결시, Fe재ZnO중적참잡마이분수약위10%, 재량충기분하제비상동참잡마이분수양품적자성불동, 시유우Fe재양품중소처적개태불동, 종이영향료양품적결구급자성.
The dry gel precursors were synthesized from Zn nitrate and Fe nitrate with a citric acid solution by means of sol-gel method. We obtained a series of Zn_(1-x)Fe_xO after the precursors were sintered in air and in argon. The structure and magnetic properties of Zn_(1-x)Fe_xO were characterized by virtue of X-ray diffractometer (XRD), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and vibration sample magnetometer (VSM). The results show that the doping concentration of Fe in ZnO sintered in air is less than 4% , while sintering in argon, the doping concentration of Fe in ZnO is close to 10%. The magnetic performance of sample with the same doping concentration prepared in two gas atmospheres was different. XPS analysis shows that Fe existed in different valences in samples prepared in different sintering atmospheres so as to affect the structure and. Magnetic performance of samples.