0.5Bi4.5Ti4O15;水熱;納米粉;介電性能"/> 3)3.5H2O、Ti(C4H9O)4和CH3COONa?3H2O為反應(yīng)起始原料,通過兩次水熱法制備Aurivillius型鈦酸鉍鈉(Na0.5Bi4.5Ti4O15,NBT),采用XRD和SEM研究兩次水熱條件所合成粉體的晶相組成和形貌,并測(cè)量了所得陶瓷的顯微結(jié)構(gòu)和電性能。研究表明,水熱法所得納米粉體由粒徑～1.0μm、平均厚度<100nm的片狀顆粒堆積而成,且各元素之比非常接近于NBT的化學(xué)計(jì)量比。NBT納米粉體的合成溫度低至260~270℃,是已公開報(bào)道文獻(xiàn)中的最低溫度。與傳統(tǒng)固相燒結(jié)法所得NBT陶瓷相比較,用該水熱粉體所得陶瓷具有非常相近的居里溫度(≈674℃),且瓷體致密、細(xì)晶(<2μm),高溫介電性能獲得明顯改善。"/>

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Aurivillius型鈦酸鉍鈉的低溫合成及電性能研究
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華南理工大學(xué),華南理工大學(xué),華南理工大學(xué)

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廣東省科技計(jì)劃項(xiàng)目(No. 2007A010500012,2013A011401010)


Synthesis and electrical properties of Aurivillius-type sodium bismuth titanate at low temperatures
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South China University of Technology,South China University of Technology,South China University of Technology

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    摘要:

    以分析純的Bi(NO3)3.5H2O、Ti(C4H9O)4和CH3COONa?3H2O為反應(yīng)起始原料,通過兩次水熱法制備Aurivillius型鈦酸鉍鈉(Na0.5Bi4.5Ti4O15,NBT),采用XRD和SEM研究兩次水熱條件所合成粉體的晶相組成和形貌,并測(cè)量了所得陶瓷的顯微結(jié)構(gòu)和電性能。研究表明,水熱法所得納米粉體由粒徑～1.0μm、平均厚度<100nm的片狀顆粒堆積而成,且各元素之比非常接近于NBT的化學(xué)計(jì)量比。NBT納米粉體的合成溫度低至260~270℃,是已公開報(bào)道文獻(xiàn)中的最低溫度。與傳統(tǒng)固相燒結(jié)法所得NBT陶瓷相比較,用該水熱粉體所得陶瓷具有非常相近的居里溫度(≈674℃),且瓷體致密、細(xì)晶(<2μm),高溫介電性能獲得明顯改善。

    Abstract:

    The Aurivillius-type sodium bismuth titanate (Na0.5Bi4.5Ti4O15 or NBT) powders were prepared by two-step hydrothermal routes with starting chemicals containing Bi(NO3)3?5H2O, Ti(C4H9O)4 and CH3COONa?3H2O. Crystalline phase and morphology of hydrothermally derived powders are investigated by XRD and SEM, and microstructure and electrical properties of derived ceramics are measured. The results indicate that the elemental ratio in the composition of hydrothermally derived nanopowders is very close to stoichiometic ratio of NBT, which possessed an average diameter of about 1.0μm and a thickness of less than 100 nm. The synthesis temperatures of NBT nanopowders are as low as 260～270℃, which is the lowest temperature among those published literatures. Compared with NBT ceramics by solid state sintering process, the ceramics resulting from hydrothermally derived powders, with dense ceramic body and fine grain size (<2μm), have very similar Curie temperature (≈674℃) and improved dielectric properties at high temperature.

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樊嬌嬌,何新華,陳丹玲. Aurivillius型鈦酸鉍鈉的低溫合成及電性能研究[J].稀有金屬材料與工程,2018,47(S2):213~217.[Fan Jiao-jiao, He Xin-hua, Chen Dan-ling. Synthesis and electrical properties of Aurivillius-type sodium bismuth titanate at low temperatures[J]. Rare Metal Materials and Engineering,2018,47(S2):213~217.]
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  • 收稿日期:2017-11-29
  • 最后修改日期:2017-11-29
  • 錄用日期:2018-02-01
  • 在線發(fā)布日期: 2018-11-01
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