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Dielectric properties and specific conductivity of armenian natural clinoptilolite irradiated by electrons

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Yeritsyan H., Sahakyan A., Nikoghosyan S., Harutiunian V., Gevorkyan V., Grigoryan N., Hakhverdyan E., Keheyan Y., Gevorgyan R., Sargisyan H.

Open Physics

2005

vol. 3

issue 4

610-622

The results of dielectric properties and direct current specific electric conductivity measurements in Armenian natural clinoptilolite samples are presented. Electron irradiation with energy 8 MeV and thermal treatment of samples are performed to elucidate possible enhancement mechanisms of clinoptilolite parameters. The results are discussed on the basis of new point structural defects formation and recombination of initial ones in samples. It was shown that the irradiation dose of 3·1016 el/cm2 is critical for natural zeolite structural change, which is manifested by significant changes in dielectric properties and other characteristics. The samples subjected to high temperature heating after electron irradiation, in comparison with an unquenched one, have a significantly higher (about an order of magnitude) value of specific conductivity.

The effect of electron irradiation on the optical properties of the natural armenian zeolite-clinoptilolite

100%

Yeritsyan H., Harutiunian V., Gevorkyan V., Grigoryan N., Hakhverdyan E., Nikoghosyan S., Sahakyan A., Gevorgyan R., Sargisyan H., Keheyan Y.

Open Physics

2005

vol. 3

issue 4

623-635

Infrared (IR) absorption and luminescence in chemically and radiation-modified natural Armenian Zeolite (clinoptilolite) samples have been studied. The luminescence was studied in 390–450 nm and 620–710 nm wavelength bands, and the IR measurements were carried out in the 400–5400 cm−1 range. It is shown that the luminescence intensity depends on the content of pure clinoptilolite in the samples and, probably on the distribution of “passive” luminescence centers over Si and Al sites that became “active” under radiation or chemical treatment. The samples of electron irradiated clinoptilolite have higher luminescence intensity than the chemically and thermally treated ones. A decrease in the intensity of IR absorption bands at 3550 cm−1 and 3650 cm−1 was found after irradiation.

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2 Open Physics

2 2005

2 Gevorgyan R.

2 Gevorkyan V.

2 Grigoryan N.

2 Hakhverdyan E.

2 Harutiunian V.

2 Keheyan Y.

2 Nikoghosyan S.

2 Sahakyan A.

2 Sargisyan H.

2 Yeritsyan H.

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Dielectric properties and specific conductivity of armenian natural clinoptilolite irradiated by electrons

The effect of electron irradiation on the optical properties of the natural armenian zeolite-clinoptilolite