模板改性对SnO_2遗态陶瓷孔结构及气敏性的影响

Effect of biological template modification on pore structure and gas sensitivity properties of SnO_2 morph-genetic ceramic

以整理改性的苎麻纤维为模板,制备获得独具苎麻形态的SnO2遗态陶瓷材料。研究了试样的物相构成、显微结构,以及比表面积和孔径分布特点,测试了试样对多种气(液)体的气敏性能。结果表明,通过纺织纤维整理改性技术,可有效调控遗态材料微观结构和性能。模板的整理改性对SnO2遗态陶瓷的晶粒尺寸影响不大,但对SnO2遗态陶瓷的比表面积、孔容及孔径分布等孔结构参数影响显著。模板经碱液改性后所制备的试样,具有更优的比表面积和吸附特性,因此表现出对HCHO、C2H5OH和Petrol等气(液)体更优的气敏性优势。

SnO2 morph-genetic ceramic with special ramie form has been prepared by taking modified ramie fibers as templates.The phase composition and microstructure of the prepared materials are discussed,and their specific surface area,pore size distribution and gas sensitive property of multiple gas （liquid）are tested.The results show that the structure and properties of morph-genetic materials can be controlled effectively by modif-ying textile fibers.The modification of templates has great influence on specific surface area and pore structure parameters of SnO2 morph-genetic ceramic,but less for grain size.Especially the SnO2 fabricated by ramie fibers template treated with alkali liquor shows high specific surface area and superior absorption characteristic for HCHO,C2 H5 OH and petrol gas （liquid）.