The effect of Cr and La on MgTiO3 and MgTiO3-CaTiO3 microwave dielectric ceramics Ferreira, V. M. ; Azough, F. ; Freer, R. ; Baptista, J. L. Abstract Publication: Journal of Materials Research Pub Date: December 1997 DOI: 10.1557/JMR.1997.0433 Bibcode: 1997JMatR..12.3293F