انت هنا الان: الرئيسية » القسم الاكاديمي
المقالات الاكاديمية والبحثية

Optimization of the physical properties of barium titanates using a genetic algorithm approach

    لتحميل الملف من هنا
Views  143
Rating  0
 محمد عاصي احمد الدجيلي 04/07/2017 21:36:32
تصفح هذه الورقة الالكترونية بتقنية Media To Flash Paper

Barium titanates are widely used in the electronics industry because of their high dielectric constant and ferroelectric
and piezoelectric properties. These properties are related to the physical properties of the material; thus, the optimization of these properties is crucially important. The aim of the current work is to control the values of the processing parameters to produce the optimum density, porosity, firing shrinkage, and green density of BaTiO3. A genetic algorithm was used to fulfill this aim. The modified pechini method was used to prepare barium titanate powders with five different particle size distributions. Eighty samples were prepared using different processing parameters including the pressing rate, pressing pressure, heating rate, sintering temperature, and soaking time. A genetic algorithm (GA) approach has been applied in order to obtain the optimum processing parameters. The results showed that the best value of the density that can be achieved is 6.02 g/cm3, which is equal to the theoretical density of BaTiO3 using a pressing rate of 3 KN/S, a pressing pressure of around 370–385 Mpa, a sintering temperature of not less than 1400 °C, a soaking time of around 6–8 h, and a heating rate of 2.5 °C/min. The same upper and lower boundary conditions, used to obtain the optimum density, were also employed for the investigation of the porosity, firing shrinkage, and green density. The optimum achieved values were of geometric mean of 6.89%, 3.48 g/cm3, and 17.01% for the porosity, green density, and firing shrinkage, respectively.

  • وصف الــ Tags لهذا الموضوع
  • Physical properties . Barium titanates . Optimum density . Porosity . Firing shrinkage and green density of BaTiO3 . Genetic algorithmapproach

هذه الفقرة تنقلك الى صفحات ذات علاقة بالمقالات الاكاديمية ومنها الاوراق البحثية المقدمة من قبل اساتذة جامعة بابل وكذلك مجموعة المجلات العلمية والانسانية في الجامعة وعدد من المدنات المرفوعة من قبل مشرف موقع الكلية وهي كالاتي:

قسم المعلومات

يمكنكم التواصل مع قسم معلومات الكلية في حالة تقديم اي شكاوى من خلال الكتابة الينا,يتوجب عليك اختيار نوع الرسالة التي تود ان ترسلها لادارة الموقع :