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

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