Elastic behaviour of Zn-substituted LiMg and LiMgTi ferrites

Two series of Zn-substituted LiMg and LiMgTi ferrites were prepared by the solid state reaction method with a view to investigate their elastic behavi our. The elasticity studies were undertaken by measuring the ultrasonic vel ocities by adopting the pulse transmission technique. As the materials unde r investigation are porous, the experimentally obtained elastic moduli such as Young's moduli, rigidity moduli, Poisson's ratio have been corrected to zero porosity using Ledbetter and Datta's formulae. It has been observed t hat all the elastic moduli decrease continuously with increasing dopant's c oncentration. Using the experimental data, other important elasticity param eters such as the Debye temperature, V-l/rho and V-s/rho have also been eva luated and their variation with dopant's concentration has been explained q ualitatively. (C) 1999 Elsevier Science B.V. All rights reserved.