Composition design and properties investigation of BPDA/PDA/TFDB co‐polyimide films with low dielectric permittivity

2019 ◽  
Vol 136 (39) ◽  
pp. 47989 ◽  
Author(s):  
Xiaolan Li ◽  
Huanyu Lei ◽  
Jiacong Guo ◽  
Jianhua Wang ◽  
Shengli Qi ◽  
...  
Keyword(s):  
Dielectric Permittivity ◽  
Polyimide Films ◽  
Composition Design ◽  
Low Dielectric

scholarly journals Sintering, Microstructure, and Dielectric Properties of Copper Borates for High Frequency LTCC Applications

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4017
Author(s):  
Dorota Szwagierczak ◽  
Beata Synkiewicz-Musialska ◽  
Jan Kulawik ◽  
Norbert Pałka
Keyword(s):  
Dielectric Properties ◽  
Dielectric Permittivity ◽  
High Frequency ◽  
Ceramic Materials ◽  
Sintering Behavior ◽  
Terahertz Time Domain Spectroscopy ◽  
Very High Frequency ◽  
X Ray ◽  
Low Dielectric ◽  
Very High

New ceramic materials based on two copper borates, CuB2O4 and Cu3B2O6, were prepared via solid state synthesis and sintering, and characterized as promising candidates for low dielectric permittivity substrates for very high frequency circuits. The sintering behavior, composition, microstructure, and dielectric properties of the ceramics were investigated using a heating microscope, X-ray diffractometry, scanning electron microscopy, energy dispersive spectroscopy, and terahertz time domain spectroscopy. The studies revealed a low dielectric permittivity of 5.1–6.7 and low dielectric loss in the frequency range 0.14–0.7 THz. The copper borate-based materials, owing to a low sintering temperature of 900–960 °C, are suitable for LTCC (low temperature cofired ceramics) applications.

Novel soluble polyimides containing pyridine and fluorinated units: preparation, characterization, and optical and dielectric properties

RSC Advances ◽  
2016 ◽  
Vol 6 (26) ◽  
pp. 21662-21671 ◽  
Author(s):  
Weibing Dong ◽  
Yue Guan ◽  
Dejing Shang
Keyword(s):  
Dielectric Constant ◽  
Thermal Properties ◽  
Dielectric Properties ◽  
Low Dielectric Constant ◽  
Mechanical And Thermal Properties ◽  
Polyimide Films ◽  
Low Dielectric

To acquire low dielectric constant polyimide films with good mechanical and thermal properties and low CTE applied in microelectronic fields, three novel polyimides containing pyridine and –C(CF3)2– groups were firstly designed and synthesized.

Origin of high dielectric permittivity and low dielectric loss of Sr0.985Ce0.01TiO3 ceramics under different sintering atmospheres

2019 ◽  
Vol 782 ◽  
pp. 51-58 ◽  
Author(s):  
Junlei Qi ◽  
Minghe Cao ◽  
Yiying Chen ◽  
Hua Hao ◽  
Zhonghua Yao ◽  
...  
Keyword(s):  
Dielectric Loss ◽  
Dielectric Permittivity ◽  
Low Dielectric ◽  
High Dielectric Permittivity ◽  
High Dielectric

scholarly journals Thermoplastic Polyurethane/Lead Zirconate Titanate/Carbon Nanotube Composites with Very High Dielectric Permittivity and Low Dielectric Loss

2020 ◽  
Vol 4 (3) ◽  
pp. 137
Author(s):  
Gayaneh Petrossian ◽  
Nahal Aliheidari ◽  
Amir Ameli
Keyword(s):  
Dielectric Loss ◽  
Dielectric Permittivity ◽  
Lead Zirconate Titanate ◽  
Thermoplastic Polyurethane ◽  
Lead Zirconate ◽  
Low Dielectric ◽  
High Dielectric Permittivity ◽  
Tan Δ ◽  
High Dielectric ◽  
Very High

Ternary composites of flexible thermoplastic polyurethane (TPU), lead zirconate titanate (PZT), and multiwalled carbon nanotubes (MWCNTs) with very high dielectric permittivity (εr) and low dielectric loss (tan δ) are reported. To assess the evolution of dielectric properties with the interactions between conductive and dielectric fillers, composites were designed with a range of content for PZT (0–30 vol%) and MWCNT (0–1 vol%). The microstructure was composed of PZT-rich and segregated MWCNT-rich regions, which could effectively prevent the formation of macroscopic MWCNT conductive networks and thus reduce the high ohmic loss. Therefore, εr increased by a maximum of tenfold, reaching up to 166 by the addition of up to 1 vol% MWCNT to TPU/PZT. More importantly, tan δ remained relatively unchanged at 0.06–0.08, a similar range to that of pure TPU. εr/tan δ ratio reached 2870 at TPU/30 vol% PZT/0.5 vol% MWCNT, exceeding most of the reported values. This work demonstrates the potential of three-phase polymer/conductive filler/dielectric filler composites for efficient charge storage applications.

Core-shell functionalized MWCNT/poly(m-aminophenol) nanocomposite with large dielectric permittivity and low dielectric loss

2016 ◽  
Vol 27 (12) ◽  
pp. 1596-1603 ◽  
Author(s):  
Sushil K. Verma ◽  
Manindra Kumar ◽  
Pradip Kar ◽  
Arup Choudhury
Keyword(s):  
Dielectric Loss ◽  
Dielectric Permittivity ◽  
Core Shell ◽  
Low Dielectric

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.

Optically transparent fluoro-containing polyimide films with low dielectric permeability

2014 ◽  
Author(s):  
V. Kravtsova ◽  
M. Umersakova ◽  
R. Iskakov ◽  
O. Prikhodko ◽  
N. Korobova
Keyword(s):  
Dielectric Permeability ◽  
Polyimide Films ◽  
Low Dielectric ◽  
Optically Transparent

A methodology for the preparation of nanoporous polyimide films with low dielectric constants

2006 ◽  
Vol 510 (1-2) ◽  
pp. 241-246 ◽  
Author(s):  
Lizhong Jiang ◽  
Jiugui Liu ◽  
Dezhen Wu ◽  
Hangquan Li ◽  
Riguang Jin
Keyword(s):  
Dielectric Constants ◽  
Polyimide Films ◽  
Low Dielectric
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