發送短信 : Characterization of lead-free bismuth titanate (Bi<inf>4</inf>Ti <inf>3</inf>O<inf>12</inf>) synthesized by a modified oxalate co-precipitation method

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