Dielectric study and ac conductivity of iron sodium silicate glasses

Boroaluminosilicate glasses containing La 2 O 3 were prepared by the normal quenching method. The glass transition temperatures (T g ) were measured by di®erential scanning calorimetry (DSC). The structural role of RO was investigated by nuclear magnetic resonance (NMR). Chemical durability was evaluated by weight losses of glass samples after immersion in HC1 solution. High resolution scanning electron microscopy (HR-SEM) was used to examine the surface micrographs of corroded glass samples. The dielectric constant and tangent loss were measured in the frequency range 10À10 6 Hz. The results revealed that chemical durability and dielectric properties increased with increasing La 2 O 3 content.

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“…Polarization due to charge accumulation decreased, leading to the observed decrease in " r and tan . 26 …”

Section: Resultsmentioning

confidence: 99%

INFLUENCE OF La₂O₃ ADDITIONS ON CHEMICAL DURABILITY AND DIELECTRIC PROPERTIES OF BOROALUMINOSILICATE GLASSES

Zhang

Yue

2012

Surf. Rev. Lett.

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“…At high frequencies, periodic reversal of the electric field occurred so that there was no excess ion diffusion in the direction of the field. Polarization due to charge accumulation decreased, leading to the observed decrease in tanδ [22,23]. With the increase of CaO content, the value of tanδ was found to decrease at any frequency.…”

Section: Fig 2 Change Of the Glass Transition Temperature (T G ) With...mentioning

confidence: 91%

Effects of CaO Additions on the Structure and Dielectric Properties of Aluminoborosilicate Glasses

Yuan

Zhang

et al. 2013

AMR

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Glasses with compositions xCaO-(60-x)SiO2-5MgO-15Al2O3-20B2O3 (x=0, 3, 6 and 9 mol %) were prepared by conventional melting method. Fourier-transform infrared spectroscopy (FTIR) indicated that the addition of CaO converted trigonal boron ([B) to tetrahedral boron ([B). The glass transition temperatures (Tg) were determined using a differential scanning calorimetry (DSC). Tg increased with increasing CaO content. Thus, the addition of CaO instead of SiO2 strengthened the glass network. The dielectric εr and loss tanδ were measured for the MgO-B2O3-Al2O3-SiO2 glass system in the frequency range 103-105 Hz. The decrease in εr and tanδ could be attributed to the increase in the rigidity of the glass network.

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“…Work along these lines has been carried out in the recent years on a variety of inorganic glass materials giving valuable structural information [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Low temperature dielectric dispersion and electrical conductivity studies on Fe2O3 mixed lithium yttrium silicate glasses

Babu

Rao

Graça

et al. 2012

Journal of Non-Crystalline Solids

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Dielectric study and ac conductivity of iron sodium silicate glasses

Cited by 20 publications

References 25 publications

INFLUENCE OF La₂O₃ ADDITIONS ON CHEMICAL DURABILITY AND DIELECTRIC PROPERTIES OF BOROALUMINOSILICATE GLASSES

INFLUENCE OF La₂O₃ ADDITIONS ON CHEMICAL DURABILITY AND DIELECTRIC PROPERTIES OF BOROALUMINOSILICATE GLASSES

Effects of CaO Additions on the Structure and Dielectric Properties of Aluminoborosilicate Glasses

Low temperature dielectric dispersion and electrical conductivity studies on Fe2O3 mixed lithium yttrium silicate glasses

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Dielectric study and ac conductivity of iron sodium silicate glasses

Cited by 20 publications

References 25 publications

INFLUENCE OF La2O3 ADDITIONS ON CHEMICAL DURABILITY AND DIELECTRIC PROPERTIES OF BOROALUMINOSILICATE GLASSES

INFLUENCE OF La2O3 ADDITIONS ON CHEMICAL DURABILITY AND DIELECTRIC PROPERTIES OF BOROALUMINOSILICATE GLASSES

Effects of CaO Additions on the Structure and Dielectric Properties of Aluminoborosilicate Glasses

Low temperature dielectric dispersion and electrical conductivity studies on Fe2O3 mixed lithium yttrium silicate glasses

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INFLUENCE OF La₂O₃ ADDITIONS ON CHEMICAL DURABILITY AND DIELECTRIC PROPERTIES OF BOROALUMINOSILICATE GLASSES

INFLUENCE OF La₂O₃ ADDITIONS ON CHEMICAL DURABILITY AND DIELECTRIC PROPERTIES OF BOROALUMINOSILICATE GLASSES