Exploration of dielectric constant dependence on evolution of microstructure in nanotube/ferroelectric polymer nanocomposites

2008 ◽  
Vol 92 (8) ◽  
pp. 082902 ◽  
Author(s):  
Sheng-Hong Yao ◽  
Zhi-Min Dang ◽  
Hai-Ping Xu ◽  
Mei-Juan Jiang ◽  
Jinbo Bai
Keyword(s):  
Dielectric Constant ◽  
Polymer Nanocomposites ◽  
Ferroelectric Polymer ◽  
Evolution Of Microstructure

Fluoro-polymer functionalized graphene for flexible ferroelectric polymer-based high-k nanocomposites with suppressed dielectric loss and low percolation threshold

Nanoscale ◽  
2014 ◽  
Vol 6 (24) ◽  
pp. 14740-14753 ◽  
Author(s):  
Ke Yang ◽  
Xingyi Huang ◽  
Lijun Fang ◽  
Jinliang He ◽  
Pingkai Jiang
Keyword(s):  
Dielectric Constant ◽  
Dielectric Loss ◽  
Percolation Threshold ◽  
High Dielectric Constant ◽  
Functionalized Graphene ◽  
Ferroelectric Polymer ◽  
Flexible Polymer ◽  
High K ◽  
High Dielectric

Fluoro-polymer functionalized graphene was synthesized for flexible polymer-based nanodielectrics. The resulting nanocomposites exhibit high dielectric constant, suppressed dielectric loss and low percolation threshold.

Direct Detection of Local Electric Polarization in the Interfacial Region in Ferroelectric Polymer Nanocomposites

2019 ◽  
Vol 31 (21) ◽  
pp. 1807722 ◽  
Author(s):  
Simin Peng ◽  
Xiao Yang ◽  
Yang Yang ◽  
Shaojie Wang ◽  
Yao Zhou ◽  
...  
Keyword(s):  
Polymer Nanocomposites ◽  
Direct Detection ◽  
Electric Polarization ◽  
Interfacial Region ◽  
Ferroelectric Polymer

Charge Trapping in Hafnium Silicate Films with Modulated Composition and Enhanced Permittivity

2013 ◽  
Vol 854 ◽  
pp. 125-133 ◽  
Author(s):  
Larysa Khomenkova ◽  
Xavier Portier ◽  
Abdelilah Slaoui ◽  
Fabrice Gourbilleau
Keyword(s):  
Dielectric Constant ◽  
Electrical Properties ◽  
Magnetron Sputtering ◽  
Annealing Temperature ◽  
Annealing Treatment ◽  
Charge Trapping ◽  
Dielectric Films ◽  
Radio Frequency Magnetron Sputtering ◽  
Hafnium Silicate ◽  
Evolution Of Microstructure

Hafnium silicate dielectric films were fabricated by radio frequency magnetron sputtering. Their microstructure and electrical properties were studied versus annealing treatment. The evolution of microstructure and the formation of alternated HfO2-rich and SiO2-rich layers were observed and explained by surface directed spinodal decomposition. The stable tetragonal HfO2 phase was formed upon an annealing at 1000-1100°C. The control of annealing temperature allowed the memory window to be achieved and to be tuned as well as the dielectric constant to be enhanced.

Well dispersed silicon nanospheres synthesized by RF thermal plasma treatment and their high thermal conductivity and dielectric constant in polymer nanocomposites

RSC Advances ◽  
2015 ◽  
Vol 5 (13) ◽  
pp. 9432-9440 ◽  
Author(s):  
Guolin Hou ◽  
Benli Cheng ◽  
Fei Ding ◽  
Mingshui Yao ◽  
Yuebin Cao ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Dielectric Constant ◽  
Plasma Treatment ◽  
Polymer Nanocomposites ◽  
Thermal Plasma ◽  
High Thermal Conductivity ◽  
Large Dielectric Constant ◽  
Rf Thermal Plasma

Nanocomposites with high thermal conductivity and large dielectric constant incorporated with Si nanospheres prepared by thermal plasma are reported.

scholarly journals Sandwich-structured polymer nanocomposites with high energy density and great charge–discharge efficiency at elevated temperatures

2016 ◽  
Vol 113 (36) ◽  
pp. 9995-10000 ◽  
Author(s):  
Qi Li ◽  
Feihua Liu ◽  
Tiannan Yang ◽  
Matthew R. Gadinski ◽  
Guangzu Zhang ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
High Temperature ◽  
Energy Density ◽  
Polymer Nanocomposites ◽  
Elevated Temperatures ◽  
High Energy ◽  
Operating Conditions ◽  
High Dielectric ◽  
Discharge Efficiency ◽  
Charge Discharge

The demand for a new generation of high-temperature dielectric materials toward capacitive energy storage has been driven by the rise of high-power applications such as electric vehicles, aircraft, and pulsed power systems where the power electronics are exposed to elevated temperatures. Polymer dielectrics are characterized by being lightweight, and their scalability, mechanical flexibility, high dielectric strength, and great reliability, but they are limited to relatively low operating temperatures. The existing polymer nanocomposite-based dielectrics with a limited energy density at high temperatures also present a major barrier to achieving significant reductions in size and weight of energy devices. Here we report the sandwich structures as an efficient route to high-temperature dielectric polymer nanocomposites that simultaneously possess high dielectric constant and low dielectric loss. In contrast to the conventional single-layer configuration, the rationally designed sandwich-structured polymer nanocomposites are capable of integrating the complementary properties of spatially organized multicomponents in a synergistic fashion to raise dielectric constant, and subsequently greatly improve discharged energy densities while retaining low loss and high charge–discharge efficiency at elevated temperatures. At 150 °C and 200 MV m−1, an operating condition toward electric vehicle applications, the sandwich-structured polymer nanocomposites outperform the state-of-the-art polymer-based dielectrics in terms of energy density, power density, charge–discharge efficiency, and cyclability. The excellent dielectric and capacitive properties of the polymer nanocomposites may pave a way for widespread applications in modern electronics and power modules where harsh operating conditions are present.

Electrocaloric effect in relaxor ferroelectric polymer nanocomposites for solid-state cooling

2020 ◽  
Vol 8 (33) ◽  
pp. 16814-16830
Author(s):  
Hailong Hu ◽  
Fan Zhang ◽  
Shibin Luo ◽  
Jianling Yue ◽  
Chun-Hui Wang
Keyword(s):  
Solid State ◽  
Polymer Nanocomposites ◽  
Relaxor Ferroelectric ◽  
Cooling Efficiency ◽  
Electrocaloric Effect ◽  
Ferroelectric Polymer ◽  
Solid State Cooling

Ferroelectric polymer nanocomposites demonstrate improved adiabatic change of temperature and isothermal change of entropy and markedly enhanced heating–cooling efficiency.

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