عنوان البحث(Papers / Research Title)
دراسة تأثير السليكا والالومينا على الخواص الكهربائية للكاؤلين المكلسن
الناشر \ المحرر \ الكاتب (Author / Editor / Publisher)
هاني محمود حسين السلطاني
Citation Information
هاني,محمود,حسين,السلطاني ,دراسة تأثير السليكا والالومينا على الخواص الكهربائية للكاؤلين المكلسن , Time 5/9/2011 11:42:01 PM : كلية التربية الاساسية
وصف الابستركت (Abstract)
تضمنت الخواص المدروسة في البحث الخواص الفيزيائية والخواص الكهربائية لغاية تردد 1MHz (ثابت العزل الكهربائي وعامل القدرة والتوصيلية الكهربائية).
الوصف الكامل (Full Abstract)
Iraqi kaolin is used as a principle part of the study that include studying electrical and physical properties of samples that some of them consist of calcinated kaolin with additives (10 % , 20 % , 30 % ) of Iraqi silica and others consists of kaolin with additives (10 % , 20 % , 30 % ) of Alumina .The raw materials was well known as particle size and chemical analysis .Samples ere pressed at the pressure of 50 MPa and sintered at the temperature 1400 oC with maturing time 2 hr.
This research deals with the physical properties (linear firing shrinkage , bulk density , apparent porosity and water absorption ) and electrical properties up to 1 MHz (dielectric constant ,power factor and electrical conductivity ) .It was found that increasing of Silica additives gave less values of linear firing shrinkage relative to the Alumina additives .The samples with Alumina additives have greater values of bulk density relative to the samples with Silica additives at the ratios 20 % and 30 %, while the influence was less much on the bulk density at percentage 10 % .Through studying apparent porosity and water absorption with percentage 10 % and 20 %,it was found that samples contain Alumina additives have greater values , while the opposite was found at percentage 30 % .
Through studying the electrical properties ,it was found that ,within the extent of frequency 1 KHz , the samples contain Alumina additives have greater values of dielectric constant compared to the samples contain Silica additives .The samples contain Alumina additives have greater values of power factor and electrical conductivity up to 1 MHz . Also it was found that, at the percentage 30 % ,Silica additives gave less values of dielectric constant and electrical conductivity ; while the influence was less much on the power factor compared to the properties of samples composed of calcinated kaolin.
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