中国农业科技导报2018，Vol.20Issue(9)：122-130,9.DOI:10.13304/j.nykjdb.2018.0250
秸秆添加量对自蔓延高温合成纳米氧化锡的影响
Influence of Addition Amount of Straw on Nano-tin Oxide Product Prepared by SHS Method
摘要
Abstract
Owing to the status of low utilization rate and severe waste of crop straw resources in our country, this paper introduced crop straw powder for the first time to nano-tin oxide prepared by self-propagating high-temperature synthesis system ( SHS). Taking fixed proportion of Mg, Al, Sn, CuO, Fe3 O4, SnO2 and CaF2 to compose a basic synthesis system with certain quantum as research objective, this paper characterized nano-tin oxide products by a laser particle analyzer and atomic absorption spectrophotometer; analyzed the nano-tin oxide effective percent conversion, grain size and changing law of component when the straw addition quantity varied from 0 ～ 40％ ( weight ratio) by common function fitting and mathematical modeling; deduced the formation process of nano-tin oxide products under condition of adding crop straw; and obtained mechanism affecting nano-tin oxide by straw addition quantity. Thus, the feasibility of using crop straw powder for SHS of nano-tin oxide was proved. Results showed that appropriate crop straw addition quantity could be varified from 0 ～ 28.57％, and 28.57％ could obtain the best effect, increasing the effective conversion rate by 19.87％. But if over this range, nano-tin oxide would contain Cu impurity.Within effective range, the relationship of straw addition quantity with effective nano-tin oxide conversion rate and Sn content of nano-tin oxide products could be described by a quadratic polynomial with determination coefficients of0.997 95 and 0.999 97. The standard residual were less than 0.000 12 and 0.000 00, and the effective conversion rate of nano-tin oxide and Sn content would increase along with the increasing of straw addition quantity. But, there was no simple function relationship between straw addition mass ratio and mean grain size of nano-tin oxide, meaning it wasimpossible to control the partical size of nano-tin oxide only by adjusting straw addition quantity.关键词
秸秆/纳米氧化锡/自蔓延高温合成/添加量Key words
straw/nano-tin oxide/self-propagating high-temperature synthesis/addition quantity分类
农业科技引用本文复制引用
刘念,牛文娟,牛智有,刘静..秸秆添加量对自蔓延高温合成纳米氧化锡的影响[J].中国农业科技导报,2018,20(9):122-130,9.基金项目
中央高校基本科研业务费专项(2662015QD013)资助. （2662015QD013）
