共沉淀时间对BiFeO_3粉体制备及陶瓷性能的影响  

The Influences of Co-precipitation Time on the Preparation of BiFeO_3 Powders and Properties of BiFeO_3 Ceramics

作　　者：程振宇[1] 代建清[1] 刘浩飞[1] 王志翔[1] 李亚[1] 张瑞浩[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093

出　　处：《材料研究学报》2017年第6期451-457,共7页Chinese Journal of Materials Research

基　　金：国家自然科学基金(51162019;51462019)~~

摘　　要：控制Bi与Fe摩尔比为Bi:Fe=1.03:1,在其它实验条件不变的情况下,研究共沉淀时间对前驱体的制备及其陶瓷块材性能的影响。结果表明,共沉淀时间为95 h时得到纯相BiFeO_3粉体且粒度分布均匀;采用放电等离子烧结(spark plasma sintering,SPS)的方法制备出高密度BiFeO_3(相对密度98.3%)陶瓷块材并测试了它们的介电性能和铁电性能。结果表明在频率为30 MHz时,样品介电常数ε'最大为106.5,介电损耗tanδ最小为0.006,并在室温下检测到了饱和的电滞回线,饱和极化强度为0.4μC/cm2。The mol ratio between Bi element and Fe element was determined to be 1.03：1. The influences of co-precipitation time on the preparation of its precursor powders and properties of single-phase BiFeO_3 ceramics were researched when other conditions were fixed. The results indicated that： the pure single-phase BiFeO_3 powders was obtained at the reaction time of 95 h and the particle size was uniform.The high density BiFeO_3 （the relative density 98.3%） ceramics samples were prepared by spark plasma sintering（SPS） and then their dielectric properties and ferroelectric properties were measured. And the result showed that it also had the maximum dielectric constant 106.5 and the minimum dielectric loss 0.006 at the frequency of 30 MHz. The saturated electric hysteresis loop was detected at room temperature too,the saturated polarization is 0.4 μC/cm2.

关 键 词：无机非金属材料 共沉淀法 反应时间 铁酸铋 放电等离子烧结 

分 类 号：TM282[一般工业技术—材料科学与工程]