Sintering of 94Na(0.5)Bi(0.5)TiO(3)-6BaTiO(3) with SPS and conventional methods for crystal growth


GÜRBÜZ M., AYAS E., Dogan A.

JOURNAL OF CERAMIC PROCESSING RESEARCH, vol.17, no.1, pp.36-40, 2016 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 17 Issue: 1
  • Publication Date: 2016
  • Journal Name: JOURNAL OF CERAMIC PROCESSING RESEARCH
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.36-40
  • Keywords: 94NBT-6BT, Piezoelectric, Single crystal, SPS, Dielectric, Interface bonding, ELECTRICAL-PROPERTIES, SINGLE-CRYSTALS
  • Anadolu University Affiliated: Yes

Abstract

In this study, lead-free 94Na(0.5)Bi(0.5)TiO(3)-6BaTiO(3) (94NBT-6BT) piezoelectric ceramics and embedded single crystals in polycrystalline 94NBT-6BT matrix were sintered by conventional (CS) and spark plasma sintering (SPS) techniques. The effects of SPS and CS on the microstructure of the 94NBT-6BT ceramics were discussed and compared. Theoretical density of the CS and SPS treated samples were found to be 94% and almost 99.9%, respectively. High porosity and weak seed-matrix interaction at 1180 degrees C for 2 h were obtained from CS sintered ceramics. On the other hand, sintered samples with SPS showed non-porous polycrystalline matrix, and quite strong seed-matrix interface bonding at 950 degrees C for 5 min. Also, dielectric properties of sintered ceramics with SPS gave better results than CS. Therefore, SPS assisted 94NBT-6BT samples can be used to grow high quality and high performance single crystals using solid state single crystal growth.