Recent advances in ceramic-polymer composite electrets

Dias, C.J.; Igreja, Rui; Marat-Mendes, Rosa; Inácio, Paulo; Marat-Mendes, J.N.; Das-Gupta, D.K.

doi:10.1109/tdei.2004.1266314

Cited by 36 publications

(44 citation statements)

References 9 publications

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“…Polymer matrix ceramic filler composites receive, recently, increased attention because of their interesting electrical, electronic and functional properties [1][2][3][4][5][6]. Integrated decoupling capacitors, acoustic emission sensors, electronic packaging, self-current regulators, self-heating systems, elements for circuit protection, electrostriction artificial muscles or skins and memory switches are some possible applications [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…Integrated decoupling capacitors, acoustic emission sensors, electronic packaging, self-current regulators, self-heating systems, elements for circuit protection, electrostriction artificial muscles or skins and memory switches are some possible applications [1][2][3][4][5][6]. Moreover, electrical properties such as dielectric permittivity and conductivity can be suitably adjusted by simply controlling the type and the amount of ceramic inclusions.…”

Section: Introductionmentioning

confidence: 99%

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Electrical response and functionality of polymer matrix-titanium carbide composites

Raptis¹,

Patsidis²,

Psarras

2010

Express Polym. Lett.

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Abstract. The dielectric response and conductivity of polymer matrix-titanium carbide composites was examined by means of Broadband Dielectric Spectroscopy in the frequency range of 10 -1 -10 7 Hz and over the temperature range of 40-150°C, varying the filler content. Dielectric data were analyzed via the electric modulus formalism. Recorded relaxations were attributed to interfacial polarization, glass to rubber transition and local motions of polar side groups. Alternating current conductivity varies up to seven orders of magnitude with both frequency and temperature. Direct current conductivity increases with temperature, although the rate of its alteration does not remain constant in the examined temperature range. In the low temperature region (up to 60°C) increases at a higher rate, while right afterwards approaches rather constant values. Finally, in the high temperature range (above 90°C) conductivity raises again but at a lower rate. This behaviour adds functionality to the composites' performance and could be exploited in developing self-current regulators.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrical response and functionality of polymer matrix-titanium carbide composites

Raptis¹,

Patsidis²,

Psarras

2010

Express Polym. Lett.

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“…Integrated decoupling capacitors, angular acceleration accelerometers, acoustic emission sensors and electronic packaging are some potential applications [1,2]. Furthermore, electrical properties such as dielectric permittivity can be suitably adjusted, simply by controlling the type and the amount of ceramic inclusions.…”

Section: Introductionmentioning

confidence: 99%

Electrical relaxation dynamics in TiO2 – polymer matrix composites

Kontos¹,

Soulintzis²,

Karahaliou³

et al. 2007

Express Polym. Lett.

145

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Abstract. Polymer matrix-TiO2 composites were prepared in three different filler concentrations. The electrical relaxation dynamics as well as the electrical conductivity of all samples were examined by means of Broadband Dielectric Spectroscopy (BDS) over a wide frequency and temperature range. The recorded relaxation response includes contributions from both the polymer matrix and the reinforcing phase. Two relaxation modes (β and γ) are observed in the low temperature region, which are attributed to the re-orientation of polar side groups of the matrix and rearrangement of small parts of the polymeric chain respectively. The α-relaxation and the Maxwell-Wagner-Sillars effect (MWS), attributed to the glassrubber transition of the polymeric matrix and to interfacial polarization phenomena respectively, are observed in the high temperature region. These two mechanisms are superimposed, thus a computer simulation procedure was followed in order to distinguish them. MWS effect becomes more pronounced with increasing concentration of the filler following an Arrhenius behaviour. The relaxation frequencies corresponding to α-mode follow the Vogel-Tamann-Fulcher (VTF) equation. An additional relaxation mode is recorded at relatively high temperatures and high frequencies. Its occurrence and dynamics are related to the presence and the concentration of the filler. Finally, the Direct Current (DC) conductivity follows the VTF equation.

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“…ramic filler composites receive increased attention due to their interesting optical, electrical and electronic properties [4]- [8]. Furthermore it is well known that hybrid materials have high thermal and chemical stabilities, long life and appreciable proprieties in their different applications.…”

Section: Introductionmentioning

confidence: 99%

Preparation Characterization and Thermal Behaviour of Carbopol-TiO<sub>2</sub> Nanocomposites

Chalal¹,

Haddadine²,

Bouslah³

et al. 2014

OJOPM

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Composites consisting of carbopol (CP) and ceramic titanium dioxide nanoparticles, TiO 2 have been investigated. The CP-TiO 2 , organic-inorganic hybrid composites have been prepared in DMF by heating the mixture with a constant rate of 1˚C/min, up to 30˚C, 45˚C, 60˚C, 80˚C, 100˚C and 120˚C. Proprieties such as absorption, structure and external aspect of the obtained materials were investigated by Uv-vis, FTIR, DRX and SEM analyses. The X-ray diffraction patterns confirmed that the TiO 2 nanoparticles maintained their original tetragonal anatase-type crystalline structure in the composites. The chemical structure of the obtained materials was determined by ATR-FTIR spectroscopy. The influence of TiO 2 nanoparticles on the thermal proprieties of carbopol matrix was investigated using thermo-gravimetric analysis and differential scanning calorimetry. The glass transition temperature (Tg) of the carbopol matrix was considerably increased by the presence of ceramic feller nanoparticles and its thermal stability was significantly improved. Furthermore the water loss which represents 7.56% of the weight loss in pure CP at 100˚C was avoided in the CP-TiO 2 nanocomposites at this same temperature. This important finding revealed that ceramic fellers blocked the water loss in the modified carbopol nanocomposites, which stayed stable till 200˚C.

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Recent advances in ceramic-polymer composite electrets

Cited by 36 publications

References 9 publications

Electrical response and functionality of polymer matrix-titanium carbide composites

Electrical response and functionality of polymer matrix-titanium carbide composites

Electrical relaxation dynamics in TiO2 – polymer matrix composites

Preparation Characterization and Thermal Behaviour of Carbopol-TiO<sub>2</sub> Nanocomposites

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Recent advances in ceramic-polymer composite electrets

Cited by 36 publications

References 9 publications

Electrical response and functionality of polymer matrix-titanium carbide composites

Electrical response and functionality of polymer matrix-titanium carbide composites

Electrical relaxation dynamics in TiO2 – polymer matrix composites

Preparation Characterization and Thermal Behaviour of Carbopol-TiO&lt;sub&gt;2&lt;/sub&gt; Nanocomposites

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Product

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Preparation Characterization and Thermal Behaviour of Carbopol-TiO<sub>2</sub> Nanocomposites