Growth and Preparation of Lead-Potassium-Niobate (PKN) Single Crystals Specimens.

Abstract

Lead-potassium-niobate, Pb2KNb5O15 (PKN) is a member of the family of tungsten-bronze materials of the type A6B10O30. It is both ferroelastic and ferroelectric and it can be considered as a pseudo-binary compound represented by 2PbNb2O6.KNbO3. Its piezoelectric and electromechanical properties make it the leading substrate material for the fabrication of temperature compensated surface-acoustic-wave (SAW) devices. However, it is very difficult to synthesize PKN as a large, crack-free and chemically homogeneous single crystal. This report deals primarily with the problems encountered in crystal growth of PKN and suggests means to circumvent them. Furthermore, it describes two new methods - top seeded and solution growth - to synthesize crack-free, stoichiometrically uniform large single crystals of the compound. Also the results of PKN characterization by means of x-ray diffraction and dielectric, optical and electrical conductivity measurements are presented and discussed here.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1982
Accession Number
ADA125382

Entities

People

  • R. K. Pandey

Organizations

  • Texas A&M University

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Acoustic Waves
  • Crystal Growth
  • Crystal Structure
  • Crystals
  • Curie Temperature
  • Dielectric Permittivity
  • Electrical Conductivity
  • Ferroelectric Materials
  • High Temperature
  • Optical Properties
  • Phase Diagrams
  • Phase Transformations
  • Physical Properties
  • Piezoceramics
  • Surface Acoustic Waves
  • Transitions
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Systems Analysis and Design
  • Thin Film Deposition Science.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene