Growing Oriented Layers of Bi4Ti3O12 in Bi2O3/TiO2/SiO2/Nd2O3/ Al2O3 Glass-Ceramics by Melt Quenching

被引:10
|
作者
Wisniewski, Wolfgang [1 ]
Slavov, Stanislav [2 ]
Ruessel, Christian [1 ]
Dimitriev, Yanko [2 ]
机构
[1] Jena Univ, Otto Schott Inst, Fraunhoferstr 6, D-07743 Jena, Germany
[2] Univ Chem Technol & Met, Dept Phys, 8 Kl Ohridski Blvd, Sofia 1756, Bulgaria
来源
SCIENTIFIC REPORTS | 2018年 / 8卷
关键词
TITANATE THIN-FILMS; BISMUTH TITANATE; SURFACE CRYSTALLIZATION; PHASE-FORMATION; GROWTH; POLARIZATION; SYMMETRY;
D O I
10.1038/s41598-018-26876-6
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
A glass melt with the composition 24Bi(2)O(3)/40TiO(2)/10SiO(2)/10Nd(2)O(3)/16 Al2O3 was prepared and rapidly quenched between two copper blocks (sample A). A part of this glass was subsequently crystallised at 800 degrees C for 8 h (sample B). For the preparation of another two samples, the melt was slowly cooled on a cooper plate (sample C) or cast into a graphite mould and subsequently thermally treated at 300 degrees C for 3 h (sample D). As shown by X-ray diffraction (XRD) and scanning electron microscopy (SEM) including energy dispersive X-ray spectroscopy (EDXS) and electron backscatter diffraction (EBSD) measurements, the rapidly cooled samples contained notable amounts of uncrystallised glassy phase next to the Aurivillius phase Bi4Ti3O12. The latter occurred in higher concentrations in all other samples and formed oriented layers. Minor concentrations of Bi(2)AI(4)O(9) and Al2O3 were also detected in the microstructure.
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页数:12
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