Effect of PTFE, PET, and PFA on the microwave dielectric properties of H3BO3 ceramics

Ding, Guo-An; Qu, Jingjing; Liu, Fei; Yuan, Changlai; Liu, Xiao; Meng, Liufang; Chen, Guohua; Su, Qi

doi:10.1016/j.matchemphys.2021.125566

Cited by 6 publications

(2 citation statements)

References 48 publications

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“…Because of the positive τ f of the PTFE, the τ f of the composite ceramic changes from −7.4 to +10.1 ppm/ • C with an increase in PTFE addition, whereas ε r decreases from 11.4 to 8.4, and Q × f decreases from 7070 to ∼5100 GHz, which is better than those of other ceramic-polymer composites. [18][19][20] These results confirm that cold sintering is a promising method to achieve the direct integration of ceramics and polymers in a single step.…”

Section: Introductionsupporting

confidence: 64%

“…PTFE, which is a commercial material for polymer substrates with microwave dielectric properties of ε r ∼ 2.12, Q × f ∼ 135 700 GHz, and τ f ∼ +60 ppm/°C, 17 was chosen as the polymer material to investigate the seamless integration between a microwave dielectric ceramic and a polymer substrate through cold sintering. Because of the positive τ f of the PTFE, the τ f of the composite ceramic changes from −7.4 to +10.1 ppm/°C with an increase in PTFE addition, whereas ε r decreases from 11.4 to 8.4, and Q × f decreases from 7070 to ∼5100 GHz, which is better than those of other ceramic–polymer composites 18–20 . These results confirm that cold sintering is a promising method to achieve the direct integration of ceramics and polymers in a single step.…”

Section: Introductionsupporting

confidence: 57%

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Cold sintering co‐firing of (Ca,Bi)(Mo,V)O₄–PTFE composites in a single step

Zheng

Zang

2022

J Am Ceram Soc.

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Because of large differences in the processing temperature windows between ceramics and polymers, the single-step co-sintering of microwave dielectric ceramic-polymer substrates remains challenging. In this work, a dense (Ca 0.65 Bi 0.35 )(Mo 0.65 V 0.35 )O 4 (CBMVO) ceramic was first prepared through cold sintering at 150 • C, under a uniaxial pressure of 300 MPa for 60 min with Li 2 MoO 4 (LMO) as a transient low-temperature solvent. Cold-sintered CBMVO-5 wt% LMO ceramic shows excellent microwave dielectric properties: ε r ∼ 11.4, Q × f ∼ 7070 GHz, τ f ∼ −7.4 ppm/ • C. Moreover, the optimized cold sintering process enabled the preparation of a layered co-sintered (2-2 type) CBMVO-polytetrafluoroethylene composite, which maintained excellent microwave dielectric properties and showed a good heterogeneous interface bonding. The proposed cold sintering co-firing of ceramic-polymer composites in a single step shows great potential for application in the seamless integration between ceramics and polymer substrates.

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Section: Introductionsupporting

confidence: 64%

Section: Introductionsupporting

confidence: 57%