A NEW MICROWAVE CERAMIC - POLYMER COMPOSITE WITH 0-3 CONNECTIVITY

作者：Czekaj D^*; Micior J; Lisinska Czekaj A

来源：Archives of Metallurgy and Materials, 2014, 59(1): 231-235.

DOI：10.2478/amm-2014-0037

• BiNbO4
• microwave ceramics
• PVDF
• ceramic-polymer composite
• 0-3 connectivity
• dielectric properties

Goal of the present research was to fabricate and study two-phase BiNbO4//PVDF composites with 0-3 connectivity. Such composite consists of there-dimensionally connected polymer matrix loaded with dielectric ceramic particles. In the present case BiNbO4 powder acted as an active phase (dispersed phase) whereas polyvinylidene fluoride (PVDF) acted as a non-active (passive) phase (matrix). BiNbO4// PVDF composites with the volume fraction of the ceramic phase c(V) =2, 4, 6, 8, 10, 16 and 20 vol. % were prepared. Average grain size of BiNbO4 powder was %26lt; d %26gt;=1.86 mu m. It was found that BiNbO4 powder exhibited orthorhombic symmetry with Pnna (52) space group and PVDF polymer powder was alpha-phase. Minimum of dielectric losses at room temperature were found within the frequency range Delta v = 10(3)-10(4) Hz. It was found that composite with c(V) = 10% of ceramic powder exhibited lower values of dielectric permittivity.

• 出版日期2014