Dielectric, thermal and mechanical properties of zirconium silicate reinforced high density polyethylene composites for antenna applications

Abstract

A low cost and low dielectric loss zirconium silicate (ZrSiO4) reinforced HDPE (high-density polyethylene) composite has been developed for antenna applications. The 0-3 type composite is prepared by dispersing ZrSiO4 fillers for various volume fractions (0.1 to 0.5) in the HDPE matrix by the melt mixing process. The composite shows good microwave dielectric properties with a relative permittivity of 5.6 and a dielectric loss of 0.003 at 5 GHz at the maximum filler loading of 0.5 volume fraction. The composite exhibits low water absorption, excellent thermal and mechanical properties. It shows a water absorption of 0.03 wt%, a coefficient of thermal expansion of 70 ppm per °C and a room temperature thermal conductivity of 2.4 W mK(-1). The composite shows a tensile strength of 22 MPa and a microhardness of 13.9 kg mm(-2) for the filler loading of 0.5 volume fraction. The HDPE-ZrSiO4 composites show good dielectric, thermal and mechanical properties suitable for microwave soft substrate applications. A microstrip patch antenna is designed and fabricated using the HDPE-0.5 volume fraction ZrSiO4 substrate and the antenna parameters are investigated.

Medium dielectric constant and low‐loss PTFE composites filled with MgO‐LiF co‐doped Li2TiO3 particles

“…The mechanical properties are largely affected by the connection of fillers and polymer matrix. The increase in interface defects and porosity would weaken the interaction of filler and matrix, which in return bring about the reduction of bending strength of the composites …”

Электрофизические И Механические Свойства Композита С Повышенной Диэлектрической Проницаемостью На Основе Сверхвысокомолекулярного Полиэтилена, Модифицированного Углеродными Нанотрубками

“…Одним из методов повышения ДП является введение в полимер высоких концентраций керамической фазы с большой ДП [12][13][14]. Однако это неизбежно приводит к ухудшению механических свойств материала и увеличению массы изделия [15,16]. Диэлектрическая проницаемость СВМПЭ может быть увеличена за счет введения электропроводящих углеродных нанотрубок (УНТ), как это сделано для других видов полимеров [17,18].…”

Suppression of dielectric loss of PPE/HIPS alloys in microwave region by utilization of MgO filler

“…Polymer‐based composites filled with particulate ceramics are a promising field to explore. To date, various combinations of polymers and ceramics have been studied . However, it is still a significant challenge to develop dielectric composites that unite various features.…”

“…To date, various combinations of polymers and ceramics have been studied. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] However, it is still a significant challenge to develop dielectric composites that unite various features. For dielectric properties, a small tan δ less than 10 −3 and a stable ε 0 over temperature variations are the key targets.…”