CAJ | 학술논문

采用固相球磨-水热法制备了 Mn1.56 Co0.96 Ni0.48 O4纳米粉体，研究了水热反应温度对产物粉体结构和形貌的影响，讨论了固相球磨-水热反应机理。采用X射线衍射仪、扫描电子显微镜和直流阻温测试仪对样品结构、形貌和电性能进行表征，结果表明固相球磨-水热法由于结合了固相球磨法和一步水热法的优势，因此可在低结晶温度下获得粒径小、分散度高的四方尖晶石结构纳米粉体。电学性能测试结果表明在193~373 K测试温区内，样品所制得陶瓷材料具有明显的负温度系数热敏电阻特性，材料常数B 值处于3396~3625 K。
채용고상구마-수열법제비료 Mn1.56 Co0.96 Ni0.48 O4납미분체，연구료수열반응온도대산물분체결구화형모적영향，토론료고상구마-수열반응궤리。채용X사선연사의、소묘전자현미경화직류조온측시의대양품결구、형모화전성능진행표정，결과표명고상구마-수열법유우결합료고상구마법화일보수열법적우세，인차가재저결정온도하획득립경소、분산도고적사방첨정석결구납미분체。전학성능측시결과표명재193~373 K측시온구내，양품소제득도자재료구유명현적부온도계수열민전조특성，재료상수B 치처우3396~3625 K。
The Mn1.56 Co0.96 Ni0.48 O4 nanopowders were prepared by solid-state ball milling hydrothermal meth-od.The effects of hydrothermal temperature on structure and morphology of the powders were studied and syn-thesis mechanism of solid-state ball milling hydrothermal method was discussed.The structure and electrical properties of the prepared samples were characterized by X-ray diffraction (XRD),Scanning electron micro-scope (SEM)and direct current (DC)resistance temperature measurement.Because it combines the advantages of the solid ball milling method and one-step hydrothermal method,the solid-state ball milling hydrothermal method can be applied to obtain smaller particle size and high dispersion of tetragonal spinel structure nanopow-ders at low crystallization temperatures.Electrical properties demonstrated that all ceramic samples prepared by the Mn1.56 Co0.96 Ni0.48 O4 nanopowders have obviously negative temperature coefficient characteristics in a wide temperature range from 193K to 373 K.The B values were in the range of 3 396-3 625 K.