Effect of content on dielectric performance of Barium titanate/polyimide films

2011 ◽  
Author(s):  
Minghua Chen ◽  
Jinghua Yin ◽  
Yu Feng ◽  
Xiaoxu Liu ◽  
Guang Li
Keyword(s):  
Barium Titanate ◽  
Polyimide Films ◽  
Dielectric Performance

High-performance dielectric thin film nanocomposites of barium titanate and cyanoethyl pullulan: controlling the barium titanate nanoparticle size using a sol–gel method

RSC Advances ◽  
2016 ◽  
Vol 6 (25) ◽  
pp. 20807-20813 ◽  
Author(s):  
Koichi Suematsu ◽  
Masashi Arimura ◽  
Naoyuki Uchiyama ◽  
Shingo Saita ◽  
Teruhisa Makino
Keyword(s):  
Thin Film ◽  
Barium Titanate ◽  
High Performance ◽  
Sol Gel ◽  
Nanocomposite Thin Film ◽  
Dielectric Thin Film ◽  
Dielectric Performance ◽  
High Dielectric ◽  
Size Controlled ◽  
Film Nanocomposites

Nanocomposite thin film with high dielectric performance composed of size-controlled BaTiO3 nanoparticles and cyanoethyl pullulan.

Colossal dielectric performance of pure barium titanate ceramics consolidated by spark plasma sintering

RSC Advances ◽  
2016 ◽  
Vol 6 (79) ◽  
pp. 75422-75429 ◽  
Author(s):  
X. Yang ◽  
D. Li ◽  
Z. H. Ren ◽  
R. G. Zeng ◽  
S. Y. Gong ◽  
...  
Keyword(s):  
Dielectric Loss ◽  
Barium Titanate ◽  
Dielectric Permittivity ◽  
Oxygen Vacancies ◽  
High Permittivity ◽  
Low Dielectric ◽  
Plasma Sintering ◽  
Dielectric Performance ◽  
Spark Plasma ◽  
Titanate Ceramics

The pure BaTiO3 nanoceramics have a high permittivity up to 6 × 104 and a low dielectric loss. The polaron dipoles configured by oxygen vacancies and Ti3+ cations within grains could contribute to the colossal dielectric permittivity of the ceramics.

Dielectric and Energy Storage Properties of Polyvinylidene Fluoride/Barium Titanate Nanocomposites

2013 ◽  
Vol 833 ◽  
pp. 365-369 ◽  
Author(s):  
Yan Xia Li ◽  
Jin Long Xie ◽  
Zhen Ming Chu ◽  
Xu Sheng Wang ◽  
Xi Yao
Keyword(s):  
Energy Storage ◽  
Barium Titanate ◽  
Polyvinylidene Fluoride ◽  
Breakdown Strength ◽  
Pvdf Film ◽  
Dielectric Performance ◽  
Energy Storage Properties ◽  
High Dielectric ◽  
Pure Pvdf ◽  
Storage Properties

The combination of nanoparticles with high relative permittivity and polymers with high dielectric strength offers a potential to obtain processable nanocomposites with high dielectric performance. In this work, polyvinylidene fluoride (PVDF)-barium titanate (BT) nanocomposites were prepared by spin-coating technique. The surface of BT nanoparticles was treated by titanate coupling agent NDZ101. The dielectric and energy storage properties of the system were studied as a function of BT content. The experimental results showed that the dielectric constant of the nanocomposites increased with the increase of BT content. Although pure PVDF material has the strongest dielectric breakdown strength, the discharged energy storage density Ue of the nanocomposites was greatly improved from 2.8 J/cm3 in pure PVDF film to 6.2 J/cm3 in PVDF/20 wt% BT film; due to larger polarization of the nanocomposite.

Electron microscopy and diffraction studies of polyimides

1983 ◽  
Vol 41 ◽  
pp. 28-29
Author(s):  
O.C. de Hodgins ◽  
K. R. Lawless ◽  
R. Anderson
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Structural Features ◽  
Inert Atmosphere ◽  
Polyimide Films ◽  
Resolution Electron ◽  
The Matrix ◽  
High Resolution Electron Microscope ◽  
Diffraction Patterns ◽  
Polymeric Samples

Commercial polyimide films have shown to be homogeneous on a scale of 5 to 200 nm. The observation of Skybond (SKB) 705 and PI5878 was carried out by using a Philips 400, 120 KeV STEM. The objective was to elucidate the structural features of the polymeric samples. The specimens were spun and cured at stepped temperatures in an inert atmosphere and cooled slowly for eight hours. TEM micrographs showed heterogeneities (or nodular structures) generally on a scale of 100 nm for PI5878 and approximately 40 nm for SKB 705, present in large volume fractions of both specimens. See Figures 1 and 2. It is possible that the nodulus observed may be associated with surface effects and the structure of the polymers be regarded as random amorphous arrays. Diffraction patterns of the matrix and the nodular areas showed different amorphous ring patterns in both materials. The specimens were viewed in both bright and dark fields using a high resolution electron microscope which provided magnifications of 100,000X or more on the photographic plates if desired.

DC AND AC ELECTRICAL PROPERTIES OF PTC BARIUM TITANATE CERAMICS

1990 ◽  
Vol 51 (C1) ◽  
pp. C1-979-C1-984
Author(s):  
S. HISHITA ◽  
J. F. BAUMARD ◽  
P. ABELARD
Keyword(s):  
Electrical Properties ◽  
Barium Titanate ◽  
Ac Electrical Properties ◽  
Titanate Ceramics
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