The main technical conditions for synthesizing 4A zeolite with kaolin were determined. The whiteness and calcium ion exchange capacity (CIEC) of the product wer
The aluminum nitride whiskers were synthe-sized by the nitridation of Al/AlN powders in a flowing ni-trogen atmosphere. The whiskers were about 0. 5μm in diame
This paper introduces the common parage-netic minerals of skarn-type wollastonite ore and its principleof gravitation separation for purifcation. Through the se
Piezoelectric ceramics based on PZT ceram-ics were prepared in solid state reaction with mixture ofPbO,TiO<sub>2</sub> and ZrO<sub>2</sub>,etc.XRD and SEM were