TiO2 and SiO2 filled PTFE composites for microwave substrate applications

Yuan, Ying; Cui, Yin; Wu, Kaituo; Huang, Qi; Zhang, S. R.

doi:10.1007/s10965-014-0366-y

Cited by 45 publications

(6 citation statements)

References 16 publications

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“…This result is due to increased filler-filler interactions as recycled soda lime silica content increases, confirmed by the scanning electron microscope examination. Moreover, the hydrophilic nature of the recycled soda lime silica influences the moisture intake level of the polytetrafluoroethylene matrix [54][55][56].…”

Section: Moisture Absorption Density and Tensile Strengthmentioning

confidence: 99%

Recycled soda lime silica glass inclusion in polytetrafluoroethylene matrix as reinforcement for microwave substrate application

Alhaji

Abbas

Zainuddin

et al. 2022

Materialwissenschaft Werkst

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Recycled soda lime silica glass‐filled polytetrafluoroethylene composites were prepared for substrate application at microwave frequencies. Various volume fractions (0.05–0.25) of the filler were dispersed in the polytetrafluoroethylene matrix. The composites’ dielectric, mechanical, and thermal properties were examined with respect to the filler content. X‐ray diffraction data established the phase structure of the polytetrafluoroethylene matrix and recycled soda lime silica glass. Scanning electron microscope micrographs revealed uniform filler distribution at lower recycled soda lime silica contents, while energy dispersive x‐ray analysis showed the purity of the composites. The tensile strength of the composites reduced from 13.5 MPa to 4.26 MPa, while the moisture absorption and density raised from 0.07 % and 2.195 g/cm3 to 0.19 % and 2.228 g/cm3 when the recycled soda lime silica filler volume fraction was adjusted from 0.05–0.25. The lowest coefficient of thermal expansion values was recorded at 0.25 % recycled soda lime silica volume fraction, which increased from 31.12 ppm/°C to 68.32 ppm/°C at 40 °C to 200 °C. At 0.05 filler volume fraction, the respective values of ϵ' ${\varepsilon{} { {^\prime}}}$ , tanδ ${tan\delta }$ and Td ${{T}_{d}}$ of the composites decreased from 2.20, 0.0017, and 29.69 ps to 2.15, 0.0015, and 29.35 ps in the 8.2 GHz–12.4 GHz range.

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Section: Moisture Absorption Density and Tensile Strengthmentioning

confidence: 99%

Recycled soda lime silica glass inclusion in polytetrafluoroethylene matrix as reinforcement for microwave substrate application

Alhaji

Abbas

Zainuddin

et al. 2022

Materialwissenschaft Werkst

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“…The 9 wt.% TiO 2 loaded sample exhibited high ε r value and the moisture absorption percentage was also less in comparison to the other filler loadings. This shows the importance of modifying the properties of PTFE with inorganic fillers [77]. A recent work on fluoride functionalized glass fiber (F-GF) incorporated PTFE explored the possibility of improving ε r with the minimal dielectric loss.…”

Section: Ptfe Composite Substrates For Microwave Applicationsmentioning

confidence: 99%

Performance properties and applications of polytetrafluoroethylene (PTFE)—a review

Dhanumalayan

Joshi

2018

Adv Compos Hybrid Mater

311

143

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High-performance commodity polymers are in demand due to low cost, durability, easy productivity, and recycling ability. This article comprises a survey on the performance properties of polytetrafluoroethylene (PTFE) fluoropolymer. It is a well-known choice for coatings, insulation, thermal sealing, lubrication, bearings, and clinical applications. PTFE was engineered in many forms as a function of loading nano and micro fillers for different purposes and the improved properties and performance were addressed by the researchers. Hence, we disclosed the various casting routes of PTFE which is feasible for reliable processing to serve in domestic and industrial applications.

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“…There are many PCB substrate materials suitable for microwave frequency bands, such as PTFE (polytetrafluoroethylene) substrate, RO4003, epoxy glass (FR4) et al PTFE is a kind of high performance thermoplastic polymer and can be stable work in a wide frequency range. It has a low dielectric constant

[ 30 ]. However, the relationship between substrate size and dielectric constant is inversely proportional [ 31 ]:

as a result the overall size of the substrate becomes large, making it impossible to achieve a real miniaturization.…”

Section: Design and Fabricationmentioning

confidence: 99%

Low-Cost Wireless Temperature Measurement: Design, Manufacture, and Testing of a PCB-Based Wireless Passive Temperature Sensor

Yan

Yang

Hong

et al. 2018

Sensors

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Low-cost wireless temperature measurement has significant value in the food industry, logistics, agriculture, portable medical equipment, intelligent wireless health monitoring, and many areas in everyday life. A wireless passive temperature sensor based on PCB (Printed Circuit Board) materials is reported in this paper. The advantages of the sensor include simple mechanical structure, convenient processing, low-cost, and easiness in integration. The temperature-sensitive structure of the sensor is a dielectric-loaded resonant cavity, consisting of the PCB substrate. The sensitive structure also integrates a patch antenna for the transmission of temperature signals. The temperature sensing mechanism of the sensor is the dielectric constant of the PCB substrate changes with temperature, which causes the resonant frequency variation of the resonator. Then the temperature can be measured by detecting the changes in the sensor’s working frequency. The PCB-based wireless passive temperature sensor prototype is prepared through theoretical design, parameter analysis, software simulation, and experimental testing. The high- and low-temperature sensing performance of the sensor is tested, respectively. The resonant frequency decreases from 2.434 GHz to 2.379 GHz as the temperature increases from −40 °C to 125 °C. The fitting curve proves that the experimental data have good linearity. Three repetitive tests proved that the sensor possess well repeatability. The average sensitivity is 347.45 KHz/°C℃ from repetitive measurements conducted three times. This study demonstrates the feasibility of the PCB-based wireless passive sensor, which provides a low-cost temperature sensing solution for everyday life, modern agriculture, thriving intelligent health devices, and so on, and also enriches PCB product lines and applications.

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TiO2 and SiO2 filled PTFE composites for microwave substrate applications

Cited by 45 publications

References 16 publications

Recycled soda lime silica glass inclusion in polytetrafluoroethylene matrix as reinforcement for microwave substrate application

Recycled soda lime silica glass inclusion in polytetrafluoroethylene matrix as reinforcement for microwave substrate application

Performance properties and applications of polytetrafluoroethylene (PTFE)—a review

Low-Cost Wireless Temperature Measurement: Design, Manufacture, and Testing of a PCB-Based Wireless Passive Temperature Sensor

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