Development of next-generation nanocomposite ceramic capacitors with three-dimensional epitaxial interfaces

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K18221
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Composite materials/Surface and interface engineering
• Research Institution: University of Yamanashi
• Principal Investigator: UENO Shintaro 山梨大学, 大学院総合研究部, 准教授 (40647062)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 誘電材料 / 複合材料 / セラミックス材料 / ソルボサーマル法 / エピタキシャル界面 / コアシェル構造

Outline of Final Research Achievements

To develop high-capacitance capacitors, we have focused on boundary layer (BL) ceramic capacitors which commonly exhibit a high dielectric constant. We have proposed the novel low-temperature processes, and actually the titanium metal/barium titanate (Ti/BT) composites consisting of Ti metal grains and BT boundary nanolayers were successfully prepared. The resultant Ti/BT composite capacitors achieved the high effective dielectric constant over 10000 and low tangent loss less than 5% in a wide frequency range by constructing homogeneous fine microstructures. We also fabricated the BL-type conductive perovskite oxide/insulating perovskite oxide composite ceramic capacitors with an epitaxial interface by the hydrothermal method to enhance dielectric breakdown strength.

Free Research Field

工学