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

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