摘要
采用柠檬酸溶胶-凝胶法制备了具有钙钛矿结构的稀土复合氧化物DyFeO3,X射线粉末衍射和透射电镜观察表明该材料为粒径约26nm的纳米颗粒,由于粒径的减小、表面积的增大而造成其晶体结构中呈现出一定的晶格畸变率。将材料制成气敏元件并测试了其对H2S,乙醇,CO,H2等多种气体的气敏特性,结果发现该材料对H2S有较高的灵敏度和选择性,因而有较高的实用价值。
Rare-earth composite oxide DyFeO3 was synthesized by adopting sol-gel method in citrate which belongs to the structure of peroviskite. Structural characteristics characterized by XRD and TEM indicate that this material is nanosized. The crystal structure shoes a certain amount of lattice distortion due to the decrease of the grain size and the increase of the surface area. This material was mad: into gas sensors and measured its gas-sensing properties to ethanol, CO, H-2, H2S etc. The results show that the sensors based on DyFeO3 have high sensitivity,excellent selectivity and quick response&recovery behavior to H2S.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2005年第1期124-127,共4页
Rare Metal Materials and Engineering
基金
河南省杰出青年科学基金(0012)
河南省自然科学基金资助项目(004030300)
关键词
稀土
铁酸镝
纳米材料
气敏特性
rare earth
dysprosium iron oxide
nanometer material
gas-sensing properties
