磁场处理Gd(OH)_3-PVA纳米复合材料的双折射行为  

Birefringence of Gd(OH)_3-PVA Composite Film Obtained Via Magnetically Alignment Method

作　　者：常程康[1] 徐家跃[1] 

机构地区：[1]上海应用技术学院材料科学与工程学院,上海200235

出　　处：《上海应用技术学院学报（自然科学版）》2010年第3期219-223,共5页Journal of Shanghai Institute of Technology: Natural Science

基　　金：国家自然科学基金资助项目(50972093);上海市自然科学基金资助项目(10ZR1415400);上海市教委重点学科基金资助项目(J51504);上海市科委重点基金资助项目(10XD1403800)

摘　　要：报道了一种具有双折射行为的Gd(OH)3-PVA纳米复合材料的制备方法及其光学性能。采用水热合成技术制备了纯相Gd(OH)3纳米粉体。SEM和TEM分析表明该材料为棒状结构,并且棒的生长方向沿着材料的c轴方向。将该材料在PVA水溶液中充分分散后,放置于0.4T磁场中干燥后,获得具有织构(取向)特征的透明复合材料。光学性能测试表明,该复合材料具有典型的双折射现象,显示了该技术在偏光材料领域的潜在应用价值。This paper reports the preparation and the birefringence of a Gd（OH）3-PVA nano composite.Nano scaled Gd（OH）3 crystallites were prepared by hydrothermal method,with a rod like morphology grown along c axis direction,as confirmed by SEM and TEM observation.The transparent Gd（OH）3-PVA nano composite obtained by casting the composite solution under 0.4T showed a preferred orientation,with the c axis aligned along the applied field direction.This aligned nano composite showed birefringence when observed under optical microscope with a pair of crossed polars,implying a potential application in optical area.

关 键 词：水热合成 Gd(OH)_3 纳米棒 磁场取向 双折射 

分 类 号：TB383.1[一般工业技术—材料科学与工程]