أرسل هذا في رسالة قصيرة: Effects of milling time and calcination condition on phase formation and particle size of lead zirconate nanopowders prepared by vibro-milling

 _____       ___      _____     ______  __    __  
|  __ \\    / _ \\   / ____||  /_   _// \ \\ / // 
| |  \ ||  / //\ \\ / //---`'   -| ||-   \ \/ //  
| |__/ || |  ___  ||\ \\___     _| ||_    \  //   
|_____//  |_||  |_|| \_____||  /_____//    \//    
 -----`   `-`   `-`   `----`   `-----`      `