チタン酸バリウムナノ粒子の構造と巨大誘電特性の発現機構

• 保科 拓也

  東京工業大学大学院理工学研究科材料工学専攻

書誌事項

タイトル別名

• Structure and Mechanism of Ultrahigh Dielectric Properties for Barium Titanate Nanoparticles
• チタンサン バリウムナノ リュウシ ノ コウゾウ ト キョダイ ユウデン トクセイ ノ ハツゲン キコウ

抄録

Almost impurity- and defect-free barium titanate (BaTiO₃) nanoparticles with various sizes from 20 to 430 nm were prepared using 2-step thermal decomposition method. The powder dielectric measurement method indicated that the dielectric permittivity of BaTiO₃ particles with a particle size of 140 nm exhibited a dielectric maximum of 5,000. Nano-structures of BaTiO₃ nanoparticles were analyzed using a composite structure model. It was found that BaTiO₃ nanoparticles had a composite structure consisting of (i) inner tetragonal core, (ii) gradient lattice strain layer (GLSL) and (iii) surface cubic layer. The crystal structure of each region didn’t depend on particle size while the volume fraction of the GLSL and the surface cubic layer increased with decreasing the particle size. These results suggested that the size effect of BaTiO₃ nanoparticles originated from the composite structure.

収録刊行物

• 日本結晶学会誌

  日本結晶学会誌 51 (5), 300-305, 2009

  日本結晶学会

詳細情報

• CRID: 1390001204086711040
• NII論文ID: 10026107548
• NII書誌ID: AN00188364
• DOI: 10.5940/jcrsj.51.300
• COI: 1:CAS:528:DC%2BD1MXhsFSgtbzE
• ISSN: 18845576
• ISSN: 03694585
• NDL書誌ID: 10484309
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10484309
• 本文言語コード: ja
• データソース種別:
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