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Sci Rep. 2017 Sep 27;7(1):12353. doi: 10.1038/s41598-017-12402-7.

Compositionally Graded Multilayer Ceramic Capacitors.

Author information

1
Center for Energy Harvesting Materials and System (CEHMS), Bio-Inspired Materials and Devices Laboratory (BMDL), Virginia Tech, VA, 24061, USA.
2
Center for Electronic Materials, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea.
3
Department of Materials Science and Engineering, Michigan Technological University, Houghton, MI, 49931, USA.
4
Institute for Critical Technology and Applied Science (ICTAS), Virginia Tech, Blacksburg, Virginia, 24061, USA.
5
Center for Energy Harvesting Materials and System (CEHMS), Bio-Inspired Materials and Devices Laboratory (BMDL), Virginia Tech, VA, 24061, USA. spriya@vt.edu.
6
Institute for Critical Technology and Applied Science (ICTAS), Virginia Tech, Blacksburg, Virginia, 24061, USA. spriya@vt.edu.

Abstract

Multilayer ceramic capacitors (MLCC) are widely used in consumer electronics. Here, we provide a transformative method for achieving high dielectric response and tunability over a wide temperature range through design of compositionally graded multilayer (CGML) architecture. Compositionally graded MLCCs were found to exhibit enhanced dielectric tunability (70%) along with small dielectric losses (<2.5%) over the required temperature ranges specified in the standard industrial classifications. The compositional grading resulted in generation of internal bias field which enhanced the tunability due to increased nonlinearity. The electric field tunability of MLCCs provides an important avenue for design of miniature filters and power converters.

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