Document Details

Document Type : Project 
Document Title :
Thermodynamical studies during phase transformation in chalcogenide Glasses
بعض الدراسات الديناماكية الحرارية اثناء تحولات الطور للزجاج الشالكوجيني
 
Subject : Thermodynamical studies during phase transformation in chalcogenide Glasses 
Document Language : Arabic 
Abstract : Thermodynamical studies during phase transformation in chalcogenide Glasses is a very useful tool for studying the kinetics of chemical reaction and crystallization of glasses as it is a rapid and convenient method. Since the crystallization in some of these glasses occurs at quite moderate temperatures, the study of crystallization kinetics is important from the application point of view. Such studies may also be useful in predicting the switching behavior in these glasses as the type of switching (threshold or memory) depends upon the rate of crystallization. In glassy amorphous materials, the study of phase transformation is of great importance as the temperatures at which the transformations take place, control their industrial applications. These transformations from amorphous to crystalline state can be analyzed using thermal analysis techniques. The values of these studies in glass crystallization phenomena are associated with nucleation and growth processes, which dominate the devitrification of most glassy solids. The amount of material that is transformed in a given period of time will depend upon both the rate of formation of crystalline nuclei and their rate of growth. Therefore, crystallization involves both nucleation and diffusion of the crystallizable units to the crystal front (growth). Since the write and erase time is closely related to the melting temperature (Tm) and the speed of crystallization, a detailed investigation of the compositional dependence and of the effect of a small quantity of additive on crystallization is necessary. Therefore it is interesting to study the phase transformation in chalcogenide materials. 
Publishing Year : 1428 AH
2007 AD 
Sponsor Name : King Abdulaziz University 
Sponsorship Year : 1428 AH
2007 AD 
Added Date : Monday, July 12, 2010 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
عادل صالح فيدةFaidah, Adel ٍSalehInvestigatorDoctorate 

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