Abstract: Progress including product purity,raw materials,equipment,energy saving and consumption reduction etc.of several preparation technologies developed in recent years on δ/α/β-crystalline layered sodium disilicates was introduced.In addition,progress of modification technologies,such as doping,prillaring interaction,and surface modification,of crystalline layered sodium disilicate was also introduced.It was pointed out that the development direction of crystalline layered sodium disilicate was prillaring interaction modification technology,low temperature synthesis technology,and nano-sized new material technology.

Key words: layered sodium disilicate, preparation, doping, prillaring intercation, surface modification