کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1789413 | 1023505 | 2006 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The preparation of nanophase tungsten carbide powder with zeolite-X catalysts The preparation of nanophase tungsten carbide powder with zeolite-X catalysts](/preview/png/1789413.png)
The reduction–carburization of tungsten trioxide (WO3) under carbon monoxide flow was studied in the temperature range of 300–750 °C. The reduction–carburization of WO3 was improved by mechanically mixing with zeolite-HX, -NaX and -KX. The interaction between cation in zeolite-X and oxygen in WO3 affected the improvement of the reduction–carburization of WO3 to WC. Moreover, the improved reduction–carburization of WO3 could lead to the decrease of reaction temperature. Because the particle size of WC is in contact with a reaction temperature, the nanophase WC can be prepared at low temperature. In particular, the particle size of WC was controlled by reaction temperature. The particle sizes of produced WC at 550, 650 and 700 °C were 25, 50 and 100 nm respectively.
Journal: Current Applied Physics - Volume 6, Issue 6, October 2006, Pages 1040–1043