The Controlling Factors in the Content of Cr6+ in Green Strontium Ferrite |
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| Journal | Materials Science Forum (Volumes 610 - 613) |
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| Volume | Materials Research |
| Edited by | Zhongwei Gu, Yafang Han, Fusheng Pan, Xitao Wang, Duan Weng and Shaoxiong Zhou |
| Pages | 28-31 |
| DOI | 10.4028/www.scientific.net/MSF.610-613.28 |
| Citation | Nan Chun Chen et al., 2009, Materials Science Forum, 610-613, 28 |
| Online since | January, 2009 |
| Authors | Nan Chun Chen, Han Mei Ao, Zhi Liang Zhan |
| Keywords | Cr+6, Factor, Ferrite, RoHS |
| Abstract | In order to reach the standard of the RoHS that the content of Cr6+ lower than 200ppm in ferrite, this reserch focused on the factors that influence on the content of Cr6+ during the preparation of Strontium Ferrite. The results show that the content of Cr6+ in Strontium Ferrit can be controlled among 91~117 ppm, and the optimum condition is as follows: the quality ratio of raw materials/graphite=10:1.25, the rate of the N2 flow 0.1~0.15 L/min, sintered temperature 950~1020°C, residence time 25~35min at the corresponding temperature point, granularity of the mixed system lower than 0.1~0.3mm. |
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