Microstructure and Dielectric Properties of PTFE-Based Composites Filled by Micron/Submicron-Blended CCTO

Abstract

This paper investigated a polymer-based composite by homogeneously embedding calcium copper titanate (CaCu 3 Ti 4 O 12 ; CCTO) fillers into a polytetrafluoroethylene matrix. We observed the composite filled by CCTO powder at different sizes. The particle size effects of the CCTO filling, including single-size particle filling and co-blending filling, on the microstructure and dielectric properties of the composite were discussed. The dielectric performance of the composite was investigated within the frequency range of 100 Hz to 1 MHz. Results showed that the composite filled by micron/submicron-blended CCTO particles had the highest dielectric constant (ε r = 25.6 at 100 Hz) and almost the same dielectric loss (tanδ = 0.1 at 100 Hz) as the composite filled by submicron CCTO particles at the same volume percentage content. We researched the theoretical reason of the high permittivity and low dielectric loss. We proved that it was effective in improving the dielectric property of the polymer-based composite by co-blending filling in this experiment.

Effects of Particle Size on the Dielectric, Mechanical, and Thermal Properties of Recycled Borosilicate Glass-Filled PTFE Microwave Substrates

“…The laminates are PTFEbased materials produced by [49,50] Further analysis showed that the ε and ε of PTFE/recycled BRS composites increased with the reduction in recycled BRS filler size (Table 2), in agreement with previous work [12,36]. This behaviour is attributed to the higher densification and stronger interfacial polarisation [3]. Composites reinforced with smaller grain-sized particles tend to possess a more significant interfacial area, leading to extra interfacial polarisation, which increases the dielectric properties [12,48].…”

“…The effect of recycled BRS filler size on the density of the PTFE matrix is shown in Figure 6. The 106 μm, 90 μm, 63 μm, 45 μm, 25 μm, recycled BRS composites had density values of 2.17, 2.18, 2.19, 2.20, and 2.21 g/cm 3 , respectively. Thus, decreasing recycled BRS particle size led to the increase in the density of the composites.…”

“…The last decade has seen rapid and unprecedented developments in information technology driven by military and consumer markets [1][2][3]. This change creates demands for high-speed, light and low-cost microwave substrate.…”

Role, effect, and influences of micro and nano‐fillers on various properties of polymer matrix composites for microelectronics: A review

“…73 The effect of filler addition in enhancement of dielectric permittivity of different polymers can be perceived from Table 5. In general, pristine PI is used as a polymer matrix because it has good mechanical properties, in addition to high chemical and thermal stability, but the dielectric constant ε ≈ 3.5, 74,75 and the dielectric permittivity has been several times enhanced (28.42 times, 72 26.6 times, 75 4 times, 76 Low dielectric constants materials are also equally important in the field of modern IC to minimize both cross-talk noise and resistance capacitance delay. 81 Recently, various methods have been introduced to develop PIs with low and ultra-low dielectric constant materials, 82 in particular, well-designed organic-inorganic hybrid materials systems have been gaining attraction significantly for microelectronics because of their utilization in ICs 83 and also systems with pore voids or air gap were used.…”

Significantly Enhanced Dielectric and Energy Storage Performances of Epoxy Nanocomposites via Constructing Continuous 3D BaTiO3 Network Collaborated with Graphene Oxide

“…insulating and exible behaviors of polymers [8] . Xie [9] et al introduced micron-sized calcium copper titanate (CCTO) into polytetra uoroethylene (PTFE) and fabricated the CCTO/PTFE composites by emulsion polymerization and subsequent hot-pression method. The dielectric constant of 30 vol% CCTO/PTFE composite increased to 25.6, 3 times higher than that of pure PTFE.…”