Preparation and characterization of organosoluble polyimide/BaTiO3 composite films with mechanical- and chemical-treated ceramic fillers

Lin, Chia-Yang; Kuo, Dong‐Hau; Sie, Fong-Ren; Cheng, Ju-Yin; Liou, Guey‐Sheng

doi:10.1038/pj.2012.79

Cited by 21 publications

(12 citation statements)

References 25 publications

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“…High dielectric constant of nanocomposite films was only due to the presence high dielectric ceramic material (Mn doped barium titanate). This could also be explained by the formation of a continuous BTMn ceramic filler network which induces a stronger dipole–dipole interaction along with the nanoparticle network, which forms continuous and aligned dipoles and generates additional electrical charge on the electrodes to increase the charge density and results in a higher dielectric constant . Table shows an increase in the value of dielectric constant with increases in weight percentage of BTMn ceramic nanoparticles, while dissipation factor decreased.…”

Section: Resultsmentioning

confidence: 97%

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A study of dielectric behavior of manganese doped barium titanate–polyimide composites

Kumari

Ghosh

2017

Adv Polym Technol

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In this work, a series of BaTi 1−x Mn x O 3 -polyimide films were prepared by simple solution casting method. For the preparation of composite films firstly, manganese doped barium titanate, BaTi 1−x Mn x O 3 (where x = 0.00, 0.01, 0.03, 0.05) was synthesized by sol-gel process. The effect of Mn doping on its structural and dielectric properties was nicely explained. The highest dielectric constant value of 7,104 was obtained for BaTi 0.99 Mn 0.01 O 3 (BTMn) nanoparticles with low dielectric loss value 2.44. It was observed that Mn-doping concentration on barium titanate influences its crystal structure. Improved dielectric properties were reported for nanocomposite thin films containing BaTi 0.99 Mn 0.01 O 3 and polyimide (PI). A series of five homogeneous nanocomposite films were successfully prepared and were characterized thoroughly. The dielectric properties were studied as a function of frequency and loading percentage of BTMn in PI. The dielectric constant of the BTMn/PI nanocomposite films increased from 3.23 to 8.63 with the increase in loading percentage of ceramic from 0 to 5 wt%, respectively. The nanocomposite films were flexible with good mechanical properties and the flexibility decreased with increase in loading percentage of BTMn. The films showed high thermal stability in nitrogen atmosphere up to 571°C with 10% weight loss and also exhibited high glass transition temperature up to 337°C. K E Y W O R D S dielectric properties, inorganic materials, mechanical properties, polyimides, thermal properties How to cite this article: Kumari A, Dasgupta Ghosh B. A study of dielectric behavior of manganese doped barium titanate-polyimide composites. Adv Polym

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Section: Resultsmentioning

confidence: 97%

“…[42] Table 4 shows an increase in the value of dielectric constant with increases in weight percentage of BTMn ceramic nanoparticles, while dissipation factor decreased. It is directly related to the weight percentage of the ceramic content.…”

Section: Dielectric Propertiesmentioning

confidence: 97%

A study of dielectric behavior of manganese doped barium titanate–polyimide composites

Kumari

Ghosh

2017

Adv Polym Technol

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“…The variation of dielectric constant can also be explained by the formation of ceramic (BTL) network in the polyimide matrix. The unbroken network of BTL ceramic nanoparticles caused a stronger dipole–dipole interaction which helped in the generation of additional electric charge on the electrodes as a result charge density increased which consecutively increased the dielectric constant of the composite material . The dielectric loss value was higher in lower frequency region and as the frequency was increased the value decreased.…”

Section: Resultsmentioning

confidence: 99%

La doped barium titanate/polyimide nanocomposites: A study of the effect of La doping and investigation on thermal, mechanical and high dielectric properties

Kumari

Ghosh

2018

J of Applied Polymer Sci

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This manuscript describes the enhanced dielectric properties of lanthanum doped barium titanate nanoparticles and Ba 0.993 La 0.007 TiO 3 (BTL)/polyimide (PI) nanocomposites. A series of La doped barium titanate, Ba (1-x) La x TiO 3 where x = 0.0, 0.003, 0.005, and 0.007, were synthesized by sol-gel method. Frequency and temperature dependent dielectric constants were evaluated and the highest dielectric constant value (34363) was obtained for BTL at 1 Hz frequency. The Curie temperature of the ceramics was obtained in the range of 120-135 C. The nanocomposites were prepared by adding 0-5 wt% BTL in poly(amic)acid by solution-casting method and characterized thoroughly. The nanocomposites showed high thermal stability upto 524 C with good mechanical properties. The frequency and temperature dependent dielectric constant values of nanocomposites were increased with the increase in BTL content. The highest dielectric constant value 25.05 was obtained for 5 wt% BTL/PI nanocomposite, which was about 7.75 times greater than that of the pure PI.

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“…[112] Moreover, the agglomeration can also form holes which reduce breakdown strength. [113] Meanwhile, the agglomeration of nanoparticles can increase the stress concentration points which weaken mechanical properties of composites. [114] Therefore, a lot of effort has been done to prepare polymer/BaTiO3 composites with well dispersed nano BaTiO3 particles through surface modification.…”

Section: Surface Modification Of Batio3mentioning

confidence: 99%

Recent development on modification of synthesized barium titanate (BaTiO3) and polymer/BaTiO3 dielectric composites

Zhang

2018

J Mater Sci: Mater Electron

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Preparation and characterization of organosoluble polyimide/BaTiO3 composite films with mechanical- and chemical-treated ceramic fillers

Cited by 21 publications

References 25 publications

A study of dielectric behavior of manganese doped barium titanate–polyimide composites

A study of dielectric behavior of manganese doped barium titanate–polyimide composites

La doped barium titanate/polyimide nanocomposites: A study of the effect of La doping and investigation on thermal, mechanical and high dielectric properties

Recent development on modification of synthesized barium titanate (BaTiO3) and polymer/BaTiO3 dielectric composites

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