Effect of elemental diffusion on temperature coefficient of piezoelectric properties in KNN-based lead-free composites

Cheol Woo Ahn, Chee Sung Park, Robert Dittmer, Soon Hyung Hong, Shashank Priya

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

A study was conducted to investigate the effect of elemental diffusion on temperature coefficient of piezoelectric properties in KNN-based lead-free composites. KNN and KNLNS-BT powders were calcined at 950 °C for 3 hours and KNN was sintered at 1100 °C for 2 hours to conduct the investigations. Sintered KNN was crushed using mortar and pestle and its particle size was controlled to be in the range of 25-150 μm by sieving. Crushed KNN powders and ball-milled KNLNS-BT powders were mixed in the weight ratio of 0.5/0.5. The two type I and type II structures were pressed into disks under pressure of 100 kgf/cm2 and sintered at 1060 °C for 2 hours. The samples were poled in silicone oil at 120 °C by applying DC field of 4 kV/mm for 60 minutes and all electrical measurements were done on aged samples.

Original languageEnglish (US)
Pages (from-to)3961-3965
Number of pages5
JournalJournal of Materials Science
Volume45
Issue number14
DOIs
StatePublished - Jul 2010

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Ceramics and Composites
  • Mechanical Engineering
  • Polymers and Plastics
  • General Materials Science
  • Materials Science (miscellaneous)

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