Electro-physical Properties of Super-thin Basalt Fiber Chemically Modified by Hydrochloric or Sulphuric Acid

The influence of hydrochloric or sulphuric acid treatment on the electro-physical properties of super-thin basalt fiber (STBF) made from Armenian basalt rocks was studied.

Carrying out expert evaluations and updating business plans and feasibility studies of investment projects for the production of continuous basalt fiber, staple fiber and basalt composite products.

Specific electric resistance for direct and alternating currents, dielectric parameters of ε´ and ε″ were measured. It is shown that specific resistance and dielectric parameters of super-thin basalt fiber change essentially after hydrochloric or sulphuric acid treatment. The temperature dependences of these parameters were studied, too, and their non–monotonic behavior was observed. The probable variation of mentioned STBF parameters is explained by different water absorption capacity of pores as a result of acid treatment.

Thus the main results on research of the influence of acid treatments on the electro- physical parameters of STBF should be concluded as follows:

1) Electro-physical parameters of samples after sulphuric and hydrochloric leaching depending on temperature show a peak (or minimum). The appearance of the peak (or minimum) is conditioned by variation of dipolemechanism of polarization, caused by thermal activation of water molecules and further escape from the sample. And its strong temperature quenching is conditioned by high capability of absorbed water.

2) The results showed that specific electrical resistance on alternating current in STBFs, leached both in sulphuric and hydrochloric acids, depending on their packing density, qualitatively shows similar behaviour: it decreases stepwise, but in first case this decrease is quite weak.

However, the sensitivity of specific electrical resistance on direct current, compared to variation of packing density is a few times more in sample, treated with hydrochloric acid.

Sergey K. Nikoghosyan¹, Aram A. Sahakyan¹, Vasak B. Gavalyan¹, VachaganV. Harutyunyan¹, Aghasi S. Hovanisyan, Hrant.N. Yeritsyan, Vovik. A. Atoyan², Konstantin I. Puskulyan², Mark Gerchikov³, Narek V. Hakobyan⁴, Artur V. Hovhannisyan⁵.
1 A.I. Alikhanyan National Science Laboratory, Alikhanyan Brothers Str., Yerevan, Armenia
2 Armenian Nuclear Power Plant, Metcamor Region, Armenia
3 Nuclear Safety Solutions Limited, Toronto, Canada
4 Physics Department, Yerevan State University, Yerevan, Armenia
5 Ra State Nuclear Safety Regulatory Committee by the Government, Yerevan, Armenia

This work was supported by International Science and Technology Center (ISTC) Project No. A-1605. The authors are grateful for this assistance.

Countries: Canada

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