Growth of NBT template particles through topochemical microcrystal conversion and their structural characterization. Issue 3 (30th December 2016)

• Record Type: Journal Article
• Authors: Dursun, Sinan; Mensur‐Alkoy, Ebru; Sabuncu, Abdulsamet; Berksoy‐Yavuz, Ayşe; Gülgün, Mehmet Ali; Alkoy, Sedat
• Is Part Of: Journal of the American Ceramic Society. Volume 100:Issue 3(2017)
• Page Start: 937
• Page End: 944
• Publication Date: 2016-12-30
• Subjects: grain growth -- molten salt synthesis -- Na0.5Bi0.5TiO3 templates -- perovskite -- topochemical microcrystal conversion (TMC); Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.14653
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: In this study, uniform rectangular plate‐like perovskite Na0.5 Bi0.5 TiO3 templates were obtained by molten salt synthesis method in three steps. Perovskite plate‐like Na0.5 Bi0.5 TiO3 templates were synthesized from bismuth‐layered Na0.5 Bi4.5 Ti4 O15 by topochemical microcrystal conversion method at the third and final step. The most important point was that the plate‐like morphology remained as desired, but templates were obtained in cubic perovskite structure. The Na2 CO3 excess in the third step was the main controlling parameter. The crystalline orientation of the particles was investigated by electron backscatter diffraction analysis. The results indicated that the particles are single crystalline in nature. In the case of the 90 mol% excess of the stoichiometric Na2 CO3 ratio, the NBT platelets had highly regular, rectangular prismatic morphology and single‐crystal nature. The structure was also confirmed through high‐resolution transmission electron microscope and selected area electron diffraction analysis.