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zsw4882535
Òø³æ (СÓÐÃûÆø)
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¡ï
·¢Ñ¿ÍÁ¶¹(½ð±Ò+1):лл²ÎÓë 2010-06-16 20:20:15
srdong1233(½ð±Ò+15, ·ÒëEPI+1):лл 2010-06-17 14:27:54
·¢Ñ¿ÍÁ¶¹(½ð±Ò+1):лл²ÎÓë 2010-06-16 20:20:15
srdong1233(½ð±Ò+15, ·ÒëEPI+1):лл 2010-06-17 14:27:54
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·ÒëÈçÏ£º This text take organic polymer as a template £¬cerous nitrate and ammonium bicarbonate as raw materials£¬controlling synthetize superfine cerium oxide . we try to determine the best Preparation Conditions by conducting research to find the optimal consistency of PSS , charging style and value of aging time .Characterised by scanning electron microscope (SEM) ,WQL and surface area analyzer , it is showed by the result that the optimal Preparation Conditions to synthetize superfine cerium oxide comes down to this : Ortho charging ,stirring rate being 300r/min and aging time being 3h. Cerium oxide synthetized in this way appear to be lamellar granules , consistency of PSS being 0.5mol/L get the best result .But as time is limitied,we can¡¯t take other Preparation Conditions into account ,which leads to the irregular shape of the granules ,thus further research is needed. Ïà¹Øµ¥´Ê£º charging style £º¼ÓÁÏ·½Ê½ aging time£º³Â»¯Ê±¼ä scanning electron microscope:ɨÃèµç¾µ WQL£ºÁ£¶ÈÒÇ surface area analyzer£º±È±íÃæ»ýÒÇ Ortho charging £ºÕý¼ÓÁÏ·¨ |

2Â¥2010-06-16 19:19:10
noleg
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wypward:лл²ÎÓ룬Ï´ÎÒª¿ìµãÏÂÊÖ£¬ºÇºÇ 2010-06-16 21:54:36
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A superfine cerium oxide was controllable template synthesized with polymer PSS as the template and cerium nitrate and ammonium hydrogen carbonate as starting materials. The optimum conditions for preparation was found through studying on the PSS's concentration, charging manner, and ageing time. The superfine compound was characterized by means of SEM, particle size analyzer, and specific surface area meter. The result showed that conditions for the the PSS template synthesis of superfine cerium oxide is as: Õý¼Ó£¿, agitating at 300rpm, ageing for 3h. The cerium oxide obtained by this procedure are flaky particles, and the best result will be got when PSS's concentration is 0.5mol/L. However, further investigation should be carried out, due to the time limit, no sufficient conditions for preparation, and the irregular shaped particles. |
3Â¥2010-06-16 20:23:25
noleg
½ð³æ (СÓÐÃûÆø)
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- ×¢²á: 2009-12-23
- ÐÔ±ð: GG
¡ï
·¢Ñ¿ÍÁ¶¹(½ð±Ò+1):лл²ÎÓë 2010-06-16 20:25:50
srdong1233(½ð±Ò+15):лл 2010-06-17 14:28:32
·¢Ñ¿ÍÁ¶¹(½ð±Ò+1):лл²ÎÓë 2010-06-16 20:25:50
srdong1233(½ð±Ò+15):лл 2010-06-17 14:28:32
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A superfine cerium oxide was controllable template synthesized with polymer PSS as the template and cerium nitrate and ammonium hydrogen carbonate as starting materials. The optimum conditions for preparation was found through studying on the PSS's concentration, charging manner, and ageing time. The superfine compound was characterized by means of SEM, particle size analyzer, and specific surface area meter. The result showed that conditions for the the PSS template synthesis of superfine cerium oxide is as: ortho charging, agitating at 300rpm, ageing for 3h. The cerium oxide obtained by this procedure are flaky particles, and the best result will be got when PSS's concentration is 0.5mol/L. However, further investigation should be carried out, due to the time limit, no sufficient conditions for preparation, and the irregular shaped particles. |
4Â¥2010-06-16 20:24:50














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