scholarly journals Anisotropic Thermally Conductive Perfluoroalkoxy Composite with Low Dielectric Constant Fabricated by Aligning Boron Nitride Nanosheets via Hot Pressing

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1638 ◽  
Author(s):  
Xinru Zhang ◽  
Xinzhi Cai ◽  
Xiaoyu Xie ◽  
Changyu Pu ◽  
Xuanzuo Dong ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Dielectric Constant ◽  
Dielectric Property ◽  
Boron Nitride ◽  
Thermal Management ◽  
Hot Pressing ◽  
Heat Dissipation ◽  
Low Dielectric Constant ◽  
Boron Nitride Nanosheets ◽  
Low Dielectric

Thermal management has become a critical challenge in electronics and portable devices. To address this issue, polymer composites with high thermal conductivity (TC) and low dielectric property are urgently needed. In this work, we fabricated perfluoroalkoxy (PFA) composite with high anisotropic TC and low dielectric constant by aligning boron nitride nanosheets (BNNs) via hot pressing. We characterized the thermal stability, microstructure, in-plane and through-plane TCs, heat dissipation capability, and dielectric property of the composites. The results indicate that the BNNs–PFA composites possessed good thermal stability. When the BNNs content was higher than 10 wt %, the BNNs were well layer aligned in the PFA matrix, and the composites showed obvious anisotropic TC. The in-plane TC and through-plane TCs of 30 wt % BNNs–PFA composite were 4.65 and 1.94 W m−1 K−1, respectively. By using the composite in thermal management of high-power LED, we found that alignment of BNNs in composite significantly improves the heat dissipation capability of composite. In addition, the composites exhibited a low dielectric property. This study shows that hot pressing is a facile and low-cost method to fabricate bulk composite with anisotropic TC, which has wide applications in electronic packaging.

Curing Process Window and Thermal Stability of Porous MSQ-Based Low-Dielectric-Constant Materials

2004 ◽  
Vol 151 (6) ◽  
pp. F146 ◽  
Author(s):  
Shou-Yi Chang ◽  
Tzu-Jen Chou ◽  
Yung-Cheng Lu ◽  
Syun-Ming Jang ◽  
Su-Jien Lin ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Dielectric Constant ◽  
Low Dielectric Constant ◽  
Process Window ◽  
Curing Process ◽  
Low Dielectric ◽  
Low Dielectric Constant Materials ◽  
Thermal Stability Of

Deposition of Fluorinated Amorphous Carbon Thin Films with Low Dielectric Constant and Thermal Stability

2000 ◽  
Vol 612 ◽  
Author(s):  
Sang-Soo Han ◽  
Byeong-Soo Bae
Keyword(s):  
Thin Films ◽  
Thermal Stability ◽  
Dielectric Constant ◽  
Amorphous Carbon ◽  
Inductively Coupled Plasma ◽  
Gas Flow ◽  
Stable Condition ◽  
Flow Rate Ratio ◽  
Low Dielectric Constant ◽  
Low Dielectric

AbstractFluorinated amorphous carbon (a-C:F) thin films were deposited by inductively coupled plasma enhanced chemical vapor deposition (ICP-CVD) with increasing CF4:CH4 gas flow rate ratio, and then annealed with increasing annealing temperature (100, 200, 300, and 400.). We have found the reduction mechanism of the dielectric constant and the thermally stable condition for the a-C:F films. On the basis of the results, the optimal condition to satisfy both the low dielectric constant and the thermal stability is followed as; the a-C:F films have to have the compatible F content to make a compromise between the two properties; the C-Fx bonding configuration has to exist as a form of C-F2 & C-F3 instead of C-F; The films should be somewhat cross-linked structure.

Design of low dielectric constant polybenzoxazine nanocomposite using mesoporous mullite

2016 ◽  
Vol 29 (2) ◽  
pp. 141-150 ◽  
Author(s):  
K Ilango ◽  
P Prabunathan ◽  
E Satheeshkumar ◽  
P Manohar
Keyword(s):  
Thermal Stability ◽  
Dielectric Constant ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Thermal Studies ◽  
Microscopic Analysis ◽  
Low Dielectric Constant ◽  
Low Dielectric ◽  
Porous Morphology

In this present work, porous mullites (PM0–5) were synthesized through a template-assisted method using various weight percentages of pluronic (P-123). PM5 obtained using 10 wt% of P-123 was found to show maximum porosity (3.8 Å) and low dielectric constant value (2.4). PM5 was functionalized using glycidyl-terminated silane and denoted as FPM and various weight percentages of FPM were reinforced with polybenzoxazine (PBZ) matrix in order to develop FPM/PBZ nanocomposites. The thermal studies indicate that 1.5 wt% of FPM/PBZ nanocomposite showed improved thermal stability with 34% char yield at 800°C and 162°C as glass transition temperature. It also exhibits low dielectric constant (2.6) than that of the neat PBZ matrix and other FPM/PBZ nanocomposites. The microscopic analysis confirms the homogenous dispersion of FPM into the PBZ polymer that has a porous morphology. The results suggest that the as-synthesized mesoporous mullite with low dielectric constant ( k), synthesized via template-assisted method can be used as a reinforcement to decrease the dielectric constant of polymeric material, which is of industrial significance.

New fluorinated poly(ether sulfone imide)s with high thermal stability and low dielectric constant

2014 ◽  
Vol 143 (2) ◽  
pp. 773-778 ◽  
Author(s):  
Chenyi Wang ◽  
Wentao Chen ◽  
Yunyun Chen ◽  
Xiaoyan Zhao ◽  
Jian Li ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Dielectric Constant ◽  
High Thermal Stability ◽  
Low Dielectric Constant ◽  
Low Dielectric

A flexible insulator of a hollow SiO2 sphere and polyimide hybrid for flexible OLEDs

2015 ◽  
Vol 17 (4) ◽  
pp. 2416-2420 ◽  
Author(s):  
Min Kyu Kim ◽  
Dong Won Kim ◽  
Dong Wook Shin ◽  
Sang Joon Seo ◽  
Ho Kyoon Chung ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Dielectric Constant ◽  
High Thermal Stability ◽  
Low Dielectric Constant ◽  
Low Dielectric

A hollow SiO2 sphere and polyimide hybrid with a low dielectric constant and high thermal stability is useful for flexible insulators.

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