Media type: E-Article Title: Effective permittivity of air-filled cracks in piezoelectric ceramics due to crack bridging Contributor: Neumeister, Peter; Jurisch, Martin; Jelitto, Hans; Engert, Andrea R.; Schneider, Gerold A.; Balke, Herbert imprint: Elsevier BV, 2013 Published in: Acta Materialia Language: English DOI: 10.1016/j.actamat.2012.10.006 ISSN: 1359-6454 Origination: Footnote: