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针对目前本科生扫描电镜实验教学中存在以理论讲解和教师操作为主,学生主动参与性差,教学效果不理想等情况,建立以提高实验教学效果为目标的教学改革方法。通过精心设计实验教学内容、改进教学方法,以实例教学法加深学生对二次电子和背散射电子像、分辨率及景深等抽象概念的理解,增加学生自制样品观察,突出能谱测试的应用场合。授课方式既有理论讲解,又有实例图示及相关计算,使实验教学更具趣味性,激发学生的求知欲望,体现学生的主体作用,培养学生分析问题、解决问题的能力,切实提高材料专业扫描电镜实验的教学效果。
At present, there are some teaching reform methods to improve the experimental teaching effect in the experimental teaching of SEM under the condition of theoretical explanation and teacher operation, poor student active participation and unsatisfactory teaching effect. By carefully designing experimental teaching contents, improving teaching methods, deepening students ’understanding of abstract concepts such as secondary electron and backscattered electron images, resolution and depth of field by example teaching methods, increasing students’ self-made sample observation and highlighting the application of energy spectrum testing . Teaching methods not only have theoretical explanations, but also examples of illustrations and related calculations, making experimental teaching more interesting, stimulating students ’curiosity and desire, reflecting the main role of students, developing students’ ability of analyzing and solving problems, and practically improving materials professional Scanning electron microscopy experimental teaching effect.