أرسل هذا في رسالة قصيرة: Microstructures and positive temperature coefficient resistivity (PTCR) characteristics of high silicon addition barium-strontium titanate ceramics

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