أرسل هذا في رسالة قصيرة: Characterization of lead-free bismuth titanate (Bi4Ti 3O12) synthesized by a modified oxalate co-precipitation method

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