Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 34, Issue 3, Pages 687-694Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2013.09.009
Keywords
BST; Thick film; Grain size; Microwave sintering; Vendik model
Categories
Funding
- German research foundation (DFG) [HA2571/72, Ja921/16-2]
Ask authors/readers for more resources
The influence of 30 GHz microwave sintering compared to conventional sintering has been investigated on polycrystalline Ba0.6Sr0.4TiO3 (BST60) thick films with respect to an application as tunable dielectrics. The BST thick films were prepared as metal insulator metal (MIM) capacitors on alumina substrates. The average grain size (440 nm) and the porosity (approx. 30%) of the sintered films are only little affected by the sintering method. However, permittivity, dielectric loss and tunability have been influenced substantially. The dielectric improvement by microwave sintering is interpreted in terms of an increased crystal quality (xi(s)) and/or a decrease of defect concentrations. It is assumed that microwave sintering preferably heats up parts of the film where an increased defect density exists and therefore causes a selective heating process. This may heal up charged defects, inhomogeneities, and structural defects. (C) 2013 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available