發送短信 : Lightweight geopolymer made of highly porous siliceous materials with various Na<inf>2</inf>O/Al<inf>2</inf>O<inf>3</inf>and SiO<inf>2</inf>/Al<inf>2</inf>O<inf>3</inf>ratios

            _____     _____    __   __            
    ___    |  ___||  / ____||  \ \\/ //   ____    
   /   ||  | ||__   / //---`'   \ ` //   |    \\  
  | [] ||  | ||__   \ \\___      | ||    | [] ||  
   \__ ||  |_____||  \_____||    |_||    |  __//  
    -|_||  `-----`    `----`     `-`'    |_|`-`   
     `-`                                 `-`