CAJ | 학술논문

用溶胶-凝胶法在铁粉表面包覆SiO_2.包覆后的铁粉与刚玉粉、高温粘结剂按一定的配比均匀混合、压片、烧结,然后经粉碎、筛选制备出一定粒度的磁性磨料.采用热场发射扫描电子显微镜(SEM)和X射线能量色散谱(EDS)分别表征磁性磨料的形貌和元素组成,采用X-射线衍射仪(XRD)研究磁性磨料的晶体结构.并通过实验对制备的烧结磁性磨料进行性能分析.结果表明:常规烧结法制备的磁性磨料具有良好的研磨效果,磨粒相与铁磁相结合紧密,耐用时间在24 min以上;粉碎后的磁性磨料大多是不规则的颗粒,主要是由Al_2O_3、Fe_2O_3、α-Fe、AlFeO_3、(Al,Fe)_7BO_3(SiO_4)_3O_3等组成的多晶结构.
용용효-응효법재철분표면포복SiO_2.포복후적철분여강옥분、고온점결제안일정적배비균균혼합、압편、소결,연후경분쇄、사선제비출일정립도적자성마료.채용열장발사소묘전자현미경(SEM)화X사선능량색산보(EDS)분별표정자성마료적형모화원소조성,채용X-사선연사의(XRD)연구자성마료적정체결구.병통과실험대제비적소결자성마료진행성능분석.결과표명:상규소결법제비적자성마료구유량호적연마효과,마립상여철자상결합긴밀,내용시간재24 min이상;분쇄후적자성마료대다시불규칙적과립,주요시유Al_2O_3、Fe_2O_3、α-Fe、AlFeO_3、(Al,Fe)_7BO_3(SiO_4)_3O_3등조성적다정결구.
Iron powder surface was modified with SiO_2 by sol-gel method. The coated iron evenly mixed with alumina powder and high temperature binder, then sintered after tabletting, and the magnetic abrasive with a certain size was obtained by crushing and screening. Scanning electron microscope(SEM), Energy dispersive spectroscopy(EDS) and X-ray diffraction (XRD) were used to characterize the morphology, elemental composition and the crystalloid structures of magnetic abrasive. Performance analysis related to the sintered magnetic abrasive has been made. The results indicated that the magnetic abrasive prepared by conventional sintering method had good grinding effect, and the ferromagnetic phase and abrasive phase were combined closely, durable time was up to 24 mins; the magnetic abrasive after smashing was mostly irregular particles, mainly composed of Al_2O_3,Fe_2O_3,α-Fe, AlFeO_3, (Al, Fe)_7BO_3(SiO_4)_3O_3.