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   An introduction of the fluorine and Nitrogen on properties of Ca-Si-Al-O glasses  
   
نویسنده bachar a. ,mercier c. ,follet c. ,bost n. ,bentiss f. ,hampshire s.
منبع journal of materials and environmental science - 2016 - دوره : 7 - شماره : 1 - صفحه:347 -355
چکیده    Ca-sialon glasses have been known for some time [1] and they are effectively calciumalumino-silicate glasses containing nitrogen which improves their mechanical properties. calcium alumino-silicate glasses containing fluorine are known to have useful characteristics as potential bioactive materials [2]. therefore,the combination of both nitrogen and fluorine additions to these glasses may give useful glasses with enhanced mechanical stability. this paper gives a review of oxynitride glasses and reports glass formation and evaluation of glass properties in the ca-si-al-o-n-f system. within the previously defined glass forming region in the ca-si-al-o-n system,homogeneous,dense glasses are formed. however fluorine decreases the glass transition temperature,the density and the mechanical properties of the glasses while nitrogen increases them. therefore,it appears that fluorine acts as a network modifier while,on the contrary,nitrogen acts as a network former even in presence of fluorine.
کلیدواژه Glass; Mechanical properties; Oxyfluoronitride; Thermal analysis
آدرس lab. des matériaux céramiques et procédés associés,université de valenciennes et du hainaut-cambrésis,valenciennes,france,conditions extrêmes et matériaux,haute température et irradiation (cemhti),cnrs-université d'orléans,orléans, France, lab. des matériaux céramiques et procédés associés,université de valenciennes et du hainaut-cambrésis,valenciennes, France, lab. des matériaux céramiques et procédés associés,université de valenciennes et du hainaut-cambrésis,valenciennes, France, conditions extrêmes et matériaux,haute température et irradiation (cemhti),cnrs-université d'orléans,orléans, France, laboratoire de catalyse et de corrosion des matériaux (lccm),faculté des sciences,université chouaib doukkali,b.p.20,el jadida, Morocco, materials and surface science institute,university of limerick,limerick, Ireland
 
     
   
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