Dimetilamonyum-Montmorillonit Kompleksinin Dielektrik Parametrelerinin Belirlenmesi

Yıl 2006, Cilt: 2 Sayı: 27, 29 - 36, 01.12.2006

Hayrettin Küçükçelebi Hazreti Durmuş Mehmet Taşer

Öz

Bu çalışmada, Edirne-Enez bölgesinden alınan Ca-montmorillonit türü kil numunesine kısa zincirli amin grubundan dimetilamonyum hidroklorür adsorplanarak elde edilen kil-organik kompleksinin dielektrik parametreleri belirlenmiştir. Bu işlemde, numunenin 5Hz-13MHz aralığında ölçülen admitans değerlerinden hesaplanan kompleks geçirgenliğin reel ve sanal kısımları elektrik modülü formalizminde ifade edilmişitir. Bu parametrelerin belirlenmesinde, yukarıdaki frekans bölgesinde etkili olan yönelimli ve arayüzeysel kutuplanma mekanizmalarını en genel biçimde temsil eden teorik bağıntı (Havriliak-Negami ve güç yasalı iletkenlik bağıntılarının toplamı olan) deneysel verilere uydurulmuştur.

Anahtar Kelimeler

Dimetilamonyum-montmorillonit, yönelimli kutuplanma, arayüzeysel kutup-lanma, elektrik modülü formalizmi

Determination of Dielectric Parameters of Dimethylammonium-Montmorillonite Complex

Öz

In this study, we have determined the dielectric properties of the clayorganic complex obtained by adsorption of a short chained amine, namely dimethylammonium hydrochloride, on a Ca-montmorillonite type clay sample picked from Edirne-Enez area. Complex electrical permittivity of the sample are calculated from the admittance values measured in the 5Hz-13MHz range, and these permittivities are expressed using electric modulus formalism. The dielectrical parameters are determined by fitting a theoretical expression, containing the orientational (Havriliak-Negami) and interfacial (conductivity with power law) polarization mechanisms effective in the above frequency region, to the experimental data.

Anahtar Kelimeler

Dimethylammonium-montmorillonite, orientational polarization, interfacial polari-zation, electric modulus formalism

Kaynakça

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