共沉淀时间对BiFeO<sub>3</sub>粉体制备及陶瓷性能的影响

doi:10.11901/1005.3093.2015.608

材料研究学报

2017, Vol. 31

Issue (6): 451-457 DOI: 10.11901/1005.3093.2015.608

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共沉淀时间对BiFeO₃粉体制备及陶瓷性能的影响

程振宇,代建清(

),刘浩飞,王志翔,李亚,张瑞浩

昆明理工大学材料科学与工程学院昆明 650093

The Influences of Co-precipitation Time on the Preparation of BiFeO₃ Powders and Properties of BiFeO₃ Ceramics

Zhenyu CHENG,Jianqing DAI(

),Haofei LIU,Zhixiang WANG,Ya LI,Ruihao ZHANG

School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China

引用本文:

程振宇,代建清,刘浩飞,王志翔,李亚,张瑞浩. 共沉淀时间对BiFeO₃粉体制备及陶瓷性能的影响[J]. 材料研究学报, 2017, 31(6): 451-457.
Zhenyu CHENG, Jianqing DAI, Haofei LIU, Zhixiang WANG, Ya LI, Ruihao ZHANG. The Influences of Co-precipitation Time on the Preparation of BiFeO₃ Powders and Properties of BiFeO₃ Ceramics[J]. Chinese Journal of Materials Research, 2017, 31(6): 451-457.

全文: PDF(3288 KB) HTML

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BiFeO₃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BiFeO₃(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0.4 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

Abstract：

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 BiFeO₃ ceramics were researched when other conditions were fixed. The results indicated that: the pure single-phase BiFeO₃powders was obtained at the reaction time of 95 h and the particle size was uniform. The high density BiFeO₃ (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.

Key words： inorganic non-metallic materials co-precipitation reaction time BiFeO3 spark plasma sintering

收稿日期: 2016-03-17

基金资助:国家自然科学基金(51162019, 51462019)

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	程振宇
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https://www.cjmr.org/CN/10.11901/1005.3093.2015.608 或 https://www.cjmr.org/CN/Y2017/V31/I6/451

图1 (a)颗粒平均粒径(D50)随时间的变化趋势;(b)颗粒分布宽度(SPAN)随时间的变化趋势

图2 不同反应时间的BiFeO3的XRD图谱

图3 不同反应时间BiFeO3粉体的SEM图像

图4 不同反应时间的BiFeO3陶瓷密度(a)和BiFeO3陶瓷XRD图谱(b)

图5 不同反应时间的BiFeO3陶瓷SEM图像

图6 不同反应时间的BiFeO3陶瓷的介电常数(a)和介电损耗(b)

表1 不同反应时间的BiFeO3陶瓷在30 MHz时的介电常数和介电损耗

表2 不同反应时间的BiFeO3陶瓷的铁电参数

图7 不同反应时间的BiFeO3陶瓷的电滞回线

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