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Article
Calculation of the Buildup Factors for Ceramic Materials

Author: S.I. Jubair
Journal: Iraqi Journal of Applied Physics المجلة العراقية للفيزياء التطبيقية ISSN: 18132065 23091673 Year: 2011 Volume: 7 Issue: 1 Pages: 23-26
Publisher: iraqi society for alternative and renewable energy sources and techniques الجمعية العراقية لمصادر وتقنيات الطاقة البديلة والمستجدة

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Abstract

Iraqi Siliceous rocks were chosen to be used as raw materials in this study which concern with bending strength and their related parameters. They are porcelinite from Safra area (western desert) and Kaolin Duakla, their powders were mixed in certain percentage, to shape compacts and sintered. The study followed with thermal and chemical treatments, which are calcination and acid washing. The effects on final compact properties such as bending strength were studied. Bending strength was calculated for sintered compacts to study the effects of calcination processes, chemical washing, weight percentage, sintering processes, loading moment were studied on this property. Where the compacts for groups are insulating materials and have good thermal conductivity by previous studies. The results indicate that some of these groups satisfy ability the required bending strength property for electrical insulator, thermal conductivity property is required to complete final stage to be used in industry.


Article
Deposition of Major and Trace Elements From Atmosphere Over Baghdad During the Year of 2010.
تساقط العناصر الرئيسية والنزرة من الجو على مدينة بغداد عام 2010

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Abstract

Dust Samples depositions over Baghdad, from January to December 2010 were collected. The minerals and the concentration of both light elements (P, S, K, Ti, Mg, Ca, Si, Na, Al, and Fe) and heavy traces elements (Zn, Mn, Cu, Pb, Cr, Ni, As, Sr, Rb, and Co) were measured by using x-ray diffraction and fluorescence respectively. The minerals detected by x-ray diffraction were quartz, calcite, clay, gypsum, feldspar, chloride, and plagioclase. The average range for heavy elements are highly compared with the neighbor countries and similar or less than those reported for other urban worldwide, except for Ni,As,Cr,and Sr which record the highest comparing with other countries. The pH of dust was shifted to alkalinity for all samples with mean value of 8.5.

تم جمع نماذج الغبار المتساقط على مدينة بغداد للفترة من كانون ثاني ولغاية كانون اول 2010. تم تحديد المعادن في الغبار المتساقط اضافة الى العناصر الخفيفة وهي (P, S, K, Ti, Mg, Ca, Si, Na, Al, and Fe)، والعناصر الثقيلة النزرة وهي (Zn, Mn, Cu, Pb, Cr, Ni, As, Sr, Rb, and Co)اظهرت النتائج تواجد معادن الكوارتز والكالسايت و الجبسوم والفلدسبار والمعادن الطينية. تم مقارنة العناصر الثقيلة مع الدراسات العالمية وظهر بانها بنفس التراكيز او اقل الا النيكل والكروم والسترونتيوم والزرنيخ فقد كانت اعلى نسبيا كما كان مقدار الحامضية للغبار هو 8.5

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