La和Nd共掺杂BiFeO_(3)陶瓷粉体的低温自蔓延燃烧合成  

Synthesis of La and Nd co-doped BiFeO_(3) Ceramic Powders by Self-propagating Combustion at Low Temperature

作　　者：黄祥贤 HUANG Xiangxian(Fujian Leadasia New Materials Co.,Ltd,Quanzhou 362000,China)

机构地区：[1]福建立亚新材有限公司,泉州362000

出　　处：《中国陶瓷》2023年第7期46-52,共7页China Ceramics

摘　　要：以甘氨酸为络合剂,采用低温自蔓延燃烧法合成La和Nd共掺杂Bi Fe O_(3)(Bi_(0.9-x)La_(0.1)Nd_xFe O_(3),x=0.1,0.2,0.3,0.4,at%)陶瓷粉体,利用X射线衍射(XRD)、漫反射光谱(DRS)、扫描电镜(SEM)和傅里叶红外光谱(FT-IR)等技术分析产物的相组成和微观结构。结果表明:与传统固相反应法相比,低温自蔓延燃烧法的合成温度大幅降低到600℃。当La和Nd元素的掺杂量不高于30 at%时,合成的陶瓷粉体为单一的四方钙钛矿结构,固溶极限有所提高。600℃煅烧2 h所得产物的颗粒平均尺寸约为27 nm,且分散性良好。La和Nd共掺杂可以有效降低Bi Fe O_(3)的禁带宽度,提高可见光的利用率。采用低温自蔓延合成的La和Nd共掺杂Bi Fe O_(3)在铁电陶瓷和光催化材料方面具有一定的应用价值。La and Nd co-doped BiFeO_(3)(Bi_(0.9-X)La_(0.1)Nd_XFeO_(3), x=0.1, 0.2, 0.3, 0.4, at%) ceramic powders were synthesized by self-propagating combustion at low temperature using glycine as complexing agent.X-ray diffraction(XRD), diffuse reflection spectroscopy(DRS), scanning electron microscopy(SEM)and fourier transform infrared spectroscopy(FT-IR) were used to analyze the phase composition and microstructure of the products. The results showed that the synthesis temperature of low temperature selfpropagating combustion method was greatly reduced to 600 ℃ when compared with the traditional solid state reaction method. When the doping amount of La and Nd elements was not more than 30 at%, the synthesized ceramic powder exhibited a single perovskite with tetragonal structure, showing the increased solution limit. The average particle size of the product calcined at 600 ℃ for 2 h was approximately 27 nm together with a good the dispersion. The co-doping of La and Nd could reduce the band gap of BiFeO_(3) and improve the utilization of visible light effectively. The La and Nd co-doped BiFeO_(3) synthesized by selfpropagating at low temperature can find potential applications in ferroelectric ceramics and photocatalytic materials.

关 键 词：铁酸铋 钙钛矿 低温自蔓延燃烧合成 结构表征 

分 类 号：TQ174.758.11[化学工程—陶瓷工业] TB383[化学工程—硅酸盐工业]