Temperature Effects on the Dielectric Properties and Breakdown Performance of h-BN/Epoxy Composites

Tang, Yongzhe; Zhang, Peng; Zhu, Ming-Xiao; Li, Jiacai; Li, Yuxia; Wang, Ziguo; Huang, Liangsong

doi:10.3390/ma12244112

Cited by 28 publications

(13 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Epoxy resins have excellent mechanical and insulation performance and are widely used in the field of electrical and electronic information. The breakdown strength of epoxy resins is as high as 28 KV/mm, the dielectric constant at power frequency is approximately 3.5, and the mechanical elasticity can reach 53 GPa [ 1 , 2 ]. The integration of electronics and chips has been increasing due to the development of electrical and electronic technology, which generates increased heat accumulation within the electronic devices.…”

Section: Introductionmentioning

confidence: 99%

Effect of Alumina Nanowires on the Thermal Conductivity and Electrical Performance of Epoxy Composites

Huang

Tang

et al. 2020

Polymers

Self Cite

View full text Add to dashboard Cite

Alumina nanowires (Al2O3-NWs)/epoxy resin composites have been thoroughly studied due to their excellent insulating and dielectric performance. In particular, understanding the effect of nano-alumina with different morphologies on the dielectric performance of composites is of great significance. In this study, Al2O3-NWs with lengths of approximately 100 nm and diameters of approximately 5 nm were prepared and blended with anepoxy resin to form composites, and the effect of the mass fraction of fillers on the thermal conductivity of the composites was investigated. Specifically, the effect of alumina fillers with ananowire structure on the insulating and dielectric performance and breakdown strength of the epoxy composites were analyzed. The influence principle of the interfacial effect and heat accumulation on the dielectric and insulating properties of the composites were described. The results demonstrated that the thermal conductivity of Al2O3-NWs/epoxy resin composites was higher than that of the bare epoxy resin. The thermal conductivity of Al2O3-NWs/epoxy resin composites increased with increasing mass fraction of fillers. When the mass fraction of fillers was 10%, the thermal conductivity of the composite was 134% higher than that of the epoxy resin matrix. The volume resistivity of the composites first increased and then decreased as the mass fraction of fillers increased, while the dielectric constant of the composites increased with increasing mass fraction of fillers and decreasing frequency. The dielectric loss of the composites decreased and then increased as the mass fraction of fillers increased, and it increased with increasing frequency. Additionally, the alternating current breakdown strength of the composites first increased and then decreased withincreasingmass fraction of fillers.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Alumina Nanowires on the Thermal Conductivity and Electrical Performance of Epoxy Composites

Huang

Tang

et al. 2020

Polymers

Self Cite

View full text Add to dashboard Cite

show abstract

“…Therefore, the permittivity of LDPE decreases monotonically with an increase in temperature as a result of thermal volume expansion [10]. On the other hand, the permittivity depends positively on temperature in many other polar organic polymers or those with additives [2,11,12]. Regardless of whether the temperature dependence is positive or negative, if the permittivity changes with temperature, such variation in temperature must cause the resultant change in characteristic impedance.…”

Section: Discussionmentioning

confidence: 99%

Spatial Resolution between Two Abnormalities in a Cable by Frequency Domain Reflectometry

Ohki

Hirai

2021

IEEJ Transactions Elec Engng

View full text Add to dashboard Cite

The spatial resolution of a cable fault location method by frequency domain reflectometry was examined experimentally by giving two abnormalities intentionally along a 31.5‐m coaxial cable. As a result, two clear signal peaks appear, which can locate the presence of two hot spots perfectly if they are separated by more than 30 cm at a position about 15 m from the cable end with a measuring device. In addition, a clear signal peak with a small shoulder is recognized if the two hot spots are 1 cm away. Although the abnormalities were given in this research by heating the cable using tape heaters, the spatial resolution should be theoretically similar for any type of fault in a cable as long as it changes the characteristic impedance of the cable. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

show abstract

“…Also, have high electrical resistivity of 1015 Ω-cm but slightly reduces due to low resistivity of cellulose. [42] Tang et al [43] stated the effect of h-BN content on thermal properties at various temperatures along with electrical insulation performance of epoxy-micron h-BN composite. Thermal conductivity increases with h-BN and reaches a maximum up to 58% at 7 wt% of epoxy h-BN compared to pure epoxy, whereas dielectric losses go down at 3 wt%.…”

Section: Applicationsmentioning

confidence: 99%

Thermal and Electrical behaviors of Boron Nitride/Epoxy reinforced polymer matrix composite—A review

Salunke

Venkatachalam

2021

Polymer Composites

View full text Add to dashboard Cite

In electronic and electric instruments, heat dissipation is one of the major issues that degrade performance and efficiency. Polymer material has high specific strength and modulus, and it is mainly used in electrical insulation materials due to easy processability and light in weight with great flexibility but has low thermal conductivity. This paper examines the recent developments in highly thermal conductive epoxy-based polymer composites. First, the composite materials, with applications, are briefly introduced. Second, the thermally conductive polymer types with their thermal conductivity are summarized. Third, the thermal and electric properties of different boron nitride (BN) with epoxy-filled composite are listed. It also focuses on enhancement in thermal conductivity and electrical insulation, which are mainly influenced by the microstructure and amount of filler content. Some highly thermal conductive BN polymer based composites are reviewed. Fourth, various thermal conductivity measurement techniques are listed with their drawbacks. Finally, the review gives current scenario on thermal conductive polymer materials and developments needed with challenges in this area.

show abstract

Temperature Effects on the Dielectric Properties and Breakdown Performance of h-BN/Epoxy Composites

Cited by 28 publications

References 28 publications

Effect of Alumina Nanowires on the Thermal Conductivity and Electrical Performance of Epoxy Composites

Effect of Alumina Nanowires on the Thermal Conductivity and Electrical Performance of Epoxy Composites

Spatial Resolution between Two Abnormalities in a Cable by Frequency Domain Reflectometry

Thermal and Electrical behaviors of Boron Nitride/Epoxy reinforced polymer matrix composite—A review

Contact Info

Product

Resources

About