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Synthesis, structure and properties of new functional oxynitride ceramics
| Title: | Synthesis, structure and properties of new functional oxynitride ceramics |
| Authors: | Masubuchi, Yuji Browse this author →KAKEN DB |
| Keywords: | Oxynitrides | | Crystal structure | | Neutron diffraction | | Dielectric property | | Optical properties |
| Issue Date: | Feb-2013 |
| Publisher: | The Ceramic Society of Japan - 日本セラミックス協会 |
| Journal Title: | Journal of the Ceramic Society of Japan |
| Volume: | 121 |
| Issue: | 1410 |
| Start Page: | 142 |
| End Page: | 149 |
| Abstract: | Novel metal oxynitrtides have been prepared by nitridation of amorphous metal oxide precursors obtained through citrate route. Their crystal structure, especially in O/N distribution and local bonding characteristics has been analyzed by using neutron diffraction, X-ray absorption and transmission electron microscopy, to investigate their electric and optical properties. In dielectric SrTaO2N, crystal structure refinement suggested the short range O/N ordering and local tilting of cis-TaO4N2 octahedra, resulting in its unusual large permittivity. Its dense ceramics were sintered with SrCO3 additive and exhibited superior dielectric constant above 1 x 10(4) at room temperature. New biphasic wurtzite and zinc-blende structure of gallium oxynitride nanowire was observed by using transmission electron microscopy. As-grown long gallium oxynitride nanowire exhibited a characteristic broad UV emission at 4.3 eV in its cathodoluminescene spectrum. New oxynitride phosphor having magnetoplumbite structure, LaAl12(O,N)(19):Eu showed photoluminescence emission peak splitting due to Eu2+ site splitting to two crystallographic sites induced by the two kinds of anions in its crystal structure. |
| Rights: | ©2013 The Ceramic Society of Japan. All rights reserved. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/53080 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 鱒渕 友治
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