摘要
为使学生加深对实验原理的理解和灵活运用各种测试技术,本文中对"激光粒度仪法测定粉体粒度"材料化学专业实验内容进行了探讨和改进。在教学过程中,可结合艾里斑模型以及米氏散射理论的反演推导得出控制遮光率的目的。根据改进的混合粉体测定实验可加深学生对频度分布和累积分布曲线的理解。改进后的实验方案有利于学生更好的掌握此项测试方法,为今后的科学研究奠定基础。
In order to deepen students' understanding of experimental principles and to flexibly apply materials testing techniques,this article discusses and improves the material chemistry experiment of " determination of particle size by laser particle size analyzer(LPSA) ". In the teaching process,the purpose of controlling the light shading rate can be explained by combining the Airy's disc model and the Mie scattering theory. According to the mixed powder measurement experiment,students' understanding of frequency distribution and cumulative distribution curves can be deepened. The improved experimental program is conducive to students to efficiently master this test method and lay the foundation for future scientific research.
引文
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