An in situ high pressure-high temperature powder diffraction study of the formation of a precursor phase of bismuth manganite
An in situ high pressure-high temperature powder diffraction study of the formation of a precursor phase of bismuth manganite
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亚锰酸铋前驱相形成的原位高压高温粉末衍射研究
DOI：
10.1016/j.ceramint.2010.07.014
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发表时间：
2010
影响因子：
5.2
通讯作者：
Cernik R
中科院分区：
文献类型：
--
作者：
Cernik R
以bi2o3和mn2o3为原料，在金刚石砧池中原位合成了单相bimno3。将启动粉末按化学计量比混合，装入垫圈孔径为150μm的金刚石砧孔中。一个红宝石芯片被用来测量压力，一个圆形的电阻加热器围绕着电池的中心核心。在6.7GPa和480℃下，用x射线衍射研究了温度和压力对反应的影响。有证据表明，在314℃和6.7GPa的起始温度下，两种氧化物之间发生了反应，但在反应开始之前，没有证据表明单斜bi2o3转变为立方形态。形成与多铁bimno3结构相关的单斜相，空间群为Cc， A =10.21(1), b=5.356(6), c=10.38(1)Å， β=116.87(6)°。通过对具有无序Bi和Mn位点的扭曲bimno2单元细胞进行建模，获得了与该结构的良好匹配。我们没有达到足够高的温度来观察单相bimno3的形成，但是当返回到室温和常压时，观察到前驱体相持续存在。
The synthesis route for single phase BiMnO3from Bi2O3and Mn2O3has been undertaken, in situ, in a diamond anvil cell. The starting powders were mixed in a stoichiometric ratio and loaded into a diamond anvil cell with a gasket aperture of 150μm. A ruby chip was used to measure the pressure and a circular resistive heater surrounded the central core of the cell. The reaction was studied as a function of pressure and temperature to 6.7GPa and 480°C by X-ray diffraction. There was evidence of the onset of a reaction between the starting oxides at 314°C and 6.7GPa but there was no evidence of transformation of the monoclinic Bi2O3to the cubic form before the reaction began. A monoclinic phase related to the structure of multiferroic BiMnO3was observed to form with space group Cc, a=10.21(1), b=5.356(6), c=10.38(1)Å and β=116.87(6)°. A good fit for this structure was obtained by modelling a distorted BiMnO2unit cell with disordered Bi and Mn sites. We did not go sufficiently high in temperature to observe the formation of single phase BiMnO3but the precursor phase was observed to persist when returned to room temperature and pressure.
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影响因子：
4.6
作者：
Belik, Alexei A.;Yusa, Hitoshi;Takayama-Muromachi, Eiji
通讯作者：
Takayama-Muromachi, Eiji
高压高温下 BiMnO3 单晶生长
影响因子：
2
作者：
P. Toulemonde;C. Darie;C. Goujon;M. Legendre;T. Mendonca;M. Álvarez;V. Simonet;P. Bordet;P. Bouvier;J. Kreisel;M. Mezouar
通讯作者：
M. Mezouar
影响因子：
6.2
作者：
W. Paszkowicz;W. Szuszkiewicz;E. Dynowska;J. Domagała;C. Lathe
通讯作者：
C. Lathe
影响因子：
--
作者：
Sundaresan, A.;Mangalam, R. V. K.;Rao, C. N. R.
通讯作者：
Rao, C. N. R.
影响因子：
3.3
作者：
Chiba, H;Atou, T;Syono, Y
通讯作者：
Syono, Y