scholarly journals Effect of alumina shapes on dielectric properties of UV-cured epoxy acrylic composite with alumina

2019 ◽  
Vol 6 (1) ◽  
pp. 181509 ◽  
Author(s):  
Jiepeng Bian ◽  
Qiuli Zhao ◽  
Zhenzhong Hou ◽  
Jie Dong ◽  
Qinghao Yang ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Dielectric Loss ◽  
High Dielectric Constant ◽  
Breakdown Strength ◽  
Low Dielectric ◽  
The Matrix ◽  
High Dielectric ◽  
Processing Properties ◽  
Spherical Alumina ◽  
Properties Of Composites

Polymer-based composites with the advantages of ceramics and polymers exhibit high dielectric constant, good processing properties and low dielectric loss. The composites with a varied content of irregular alumina ( i -Al 2 O 3 ) filler were prepared by UV-cured epoxy acrylic (EA). Spherical alumina ( s -Al 2 O 3 ) was used as a filler to further investigate the effect of alumina (Al 2 O 3 ) shapes on dielectric properties of composites in the frequency range of 50 Hz–1 MHz. Fourier transform infrared spectroscopy proved that the UV-cured epoxy acrylic/alumina (Al 2 O 3 /EA) composites were successfully fabricated. Scanning electron microscopy demonstrated that i -Al 2 O 3 particles have superior homodispersion in the matrix. Through testing, for all samples, with the addition of Al 2 O 3 , the relative permittivity of composites increased as expected, and the dielectric loss decreased accordingly. These data show that the incorporation of i -Al 2 O 3 particles presents better properties when compared with s -Al 2 O 3 /EA, which indicates that i -Al 2 O 3 particles have more influence on the dielectric properties of the composites than those of s -Al 2 O 3 particles. According to Weibull distribution, the characteristic breakdown strength of the Al 2 O 3 /EA composites was obtained and the results suggested that the composites of i -Al 2 O 3 /EA exhibited better breakdown performance.

scholarly journals Modified halloysite nanotube filled polyimide composites for film capacitors: high dielectric constant, low dielectric loss and excellent heat resistance

RSC Advances ◽  
2018 ◽  
Vol 8 (19) ◽  
pp. 10522-10531 ◽  
Author(s):  
Tianwen Zhu ◽  
Chao Qian ◽  
Weiwen Zheng ◽  
Runxin Bei ◽  
Siwei Liu ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Dielectric Loss ◽  
High Dielectric Constant ◽  
Halloysite Nanotubes ◽  
Halloysite Nanotube ◽  
Low Dielectric ◽  
The Matrix ◽  
Polyimide Composites ◽  
High Dielectric

Halloysite nanotubes (HNTs) were chosen as the fillers and polyimide (PI) as the matrix to form a series of composites with excellent dielectric properties and thermostabilities.

NH2-functionalized carbon-coated Fe3O4 core–shell nanoparticles for in situ preparation of robust polyimide composite films with high dielectric constant, low dielectric loss, and high breakdown strength

RSC Advances ◽  
2016 ◽  
Vol 6 (109) ◽  
pp. 107533-107541 ◽  
Author(s):  
Xinliang Fang ◽  
Shanfeng Wang ◽  
Yanxiao Li ◽  
Xiaoyun Liu ◽  
Xinxin Li ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Dielectric Loss ◽  
High Dielectric Constant ◽  
Breakdown Strength ◽  
Composite Films ◽  
Shell Nanoparticles ◽  
Low Dielectric ◽  
In Situ Preparation ◽  
Carbon Coated ◽  
High Dielectric

Thermostable amine-functionalized carbon-coated Fe3O4/polyimide composites with high dielectric constant and low dielectric loss were created at a low percolation threshold.

Skin–core structured fluorinated MWCNTs: a nanofiller towards a broadband dielectric material with a high dielectric constant and low dielectric loss

2018 ◽  
Vol 6 (9) ◽  
pp. 2370-2378 ◽  
Author(s):  
Yang Liu ◽  
Cheng Zhang ◽  
Benyuan Huang ◽  
Xu Wang ◽  
Yulong Li ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Dielectric Loss ◽  
High Dielectric Constant ◽  
Dielectric Material ◽  
Epoxy Composite ◽  
Low Dielectric ◽  
High Dielectric

A novel skin–core structured fluorinated MWCNT nanofiller was prepared to fabricate epoxy composite with broadband high dielectric constant and low dielectric loss.

scholarly journals Crown ether-containing polyimides with high dielectric constant

RSC Advances ◽  
2017 ◽  
Vol 7 (38) ◽  
pp. 23309-23312 ◽  
Author(s):  
Ting Yang ◽  
Wenhui Xu ◽  
Xinwen Peng ◽  
Haoqing Hou
Keyword(s):  
Dielectric Constant ◽  
Dielectric Loss ◽  
Crown Ether ◽  
High Dielectric Constant ◽  
Low Dielectric ◽  
High Dielectric

Crown ether-containing polyimides possess high dielectric constant and low dielectric loss, without sacrificing other properties.

A versatile foaming platform to fabricate polymer/carbon composites with high dielectric permittivity and ultra-low dielectric loss

2019 ◽  
Vol 7 (1) ◽  
pp. 133-140 ◽  
Author(s):  
Biao Zhao ◽  
Mahdi Hamidinejad ◽  
Chongxiang Zhao ◽  
Ruosong Li ◽  
Sai Wang ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Dielectric Loss ◽  
Dielectric Permittivity ◽  
Carbon Composite ◽  
Carbon Composites ◽  
Low Dielectric ◽  
Composite Foams ◽  
High Dielectric Permittivity ◽  
High Dielectric

A microcellular structure can effectively tune the dielectric properties of PVDF/carbon composite foams.

Preparation and properties of thermostable well-functionalized graphene oxide/polyimide composite films with high dielectric constant, low dielectric loss and high strength via in situ polymerization

2015 ◽  
Vol 3 (18) ◽  
pp. 10005-10012 ◽  
Author(s):  
Xinliang Fang ◽  
Xiaoyun Liu ◽  
Zhong-Kai Cui ◽  
Jun Qian ◽  
Jijia Pan ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Graphene Oxide ◽  
Dielectric Loss ◽  
High Dielectric Constant ◽  
In Situ Polymerization ◽  
Composite Films ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Low Dielectric ◽  
High Dielectric

Thermostable well-functionalized graphene oxide/polyimide composites with high dielectric constant and low dielectric loss were obtained at a low percolation threshold.

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