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zwghuochetou
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2Â¥2008-04-23 08:38:38
¡ï
iamzane(½ð±Ò-1,VIP+0):ÉæÏÓµ·ÂÒ£¬¿Û³ý½ð±Ò£¬¾¯¸æ£¡
iamzane(½ð±Ò-1,VIP+0):ÉæÏÓµ·ÂÒ£¬¿Û³ý½ð±Ò£¬¾¯¸æ£¡
| The factors impact on gas sensitivity of the material were extensively investigated by the particle size, specific surface area and the oxygen content of surface adsorption.The results indicate that the nano-materials, with the particles decreases, surface and interface effects enhanced surface adsorption capacity will be strong, and gas sensitivity good. In addition, the greater the surface area of the material, the adsorption capacity of it strongest, and the better it is for gas sensitivity. So Oxygen content of the surface and its gas sensitivity inevitably exists intrinsic correlation. That is, the more oxygen of surface adsorption, the gas sensitivity of the material better. |
3Â¥2008-04-23 11:30:16
hool
¾èÖú¹ó±ö (ÕýʽдÊÖ)
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- ·ÒëEPI: 17
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- Ìû×Ó: 690
- ÔÚÏß: 1465.1Сʱ
- ³æºÅ: 536507
- ×¢²á: 2008-03-31
- ÐÔ±ð: GG
- רҵ: ½ðÊô¹¦ÄܲÄÁÏ
| The effects of factors including the particle size, specific surface area and the oxygen content of surface adsorption on the gas sensiticity have been investigated. As for the nanostructural materials, the gas sensiticity is better since the adsorption ability is enhanced due to the intensified effect of surface and interface, accompanied with the decreasing particle size. Additionally, the enhanced adsorption ability owing to the large specific surface area indicates the better gas sensitivity. An intrinsic relation esixts between the the oxygen content of surface adsorption and gas sensitvity of the materials. To be specific, the more oxygen content of surface adsorption, the better gas sensitivity of the materials |
4Â¥2008-04-23 13:00:11
bobby004
Ìú¸Ëľ³æ (³õÈëÎÄ̳)
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 6728.5
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- ³æºÅ: 442303
- ×¢²á: 2007-10-27
- ÐÔ±ð: GG
- רҵ: ¹«¹²¹ÜÀí
| From a particle size, surface area and the surface of the oxygen content of the three discussed the impact of gas sensitive material factors. For nano-materials, with the decrease of particles, surface and interface effects increased, the absorption capacity of the surface material will be strong, with good gas sensing. In addition, the surface area of greater absorption capacity of its strongest, gas sensing and also the better. Surface of the oxygen content of its gas sensing performance will inevitably exist between the links. That is, the more oxygen the surface, the sensitivity of the better material. |
5Â¥2008-04-23 16:25:11
xssh806
½ð³æ (ÕýʽдÊÖ)
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 819
- Ìû×Ó: 431
- ÔÚÏß: 23Сʱ
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- ×¢²á: 2008-03-30
| Separately from the granule size dimension, discussed the influence material gas factor compared to the surface area and the surface adsorption oxygen's content three aspects. Regarding nanomaterials, along with granule reduction, the surface and the interfacial effect strengthens, material surface's adsorptive capacity is stronger, the gas is good. Moreover, the material is bigger than the surface area, its adsorptive capacity is strongest, the gas is also better. The surface adsorption oxygen's content has inevitable contacting with its gas performance between. Namely the surface adsorption oxygen are more, the material gas is better. |
6Â¥2008-05-03 23:10:15
demonlcy
ľ³æ (СÓÐÃûÆø)
- Ó¦Öú: 1 (Ó×¶ùÔ°)
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- ÔÚÏß: 5.2Сʱ
- ³æºÅ: 444582
- ×¢²á: 2007-10-27
- רҵ: ¹«¹²¹ÜÀí
|
This Article discussed the factors that impact the gas sensitivity of materials through three aspects£ºthe particle size, the surface area and the surface adsorbed oxygen concentration . For nanomaterials, with the decrease of particle size, surface and interface effects are increased, and the absorption capacity of the surface of the material be greater, as well as a higher gas sensitivity. In addition, the greater the surface area is, the greater the absorption capacity is, and the higher the gas sensitivity is, too. There is inevitable relation between surface adsorbed oxygen concentration and gas sensitivity, that is, the higher the surface adsorbed oxygen concentration is, the higher the gas sensitivity of material is. LSÓм¸Î»¶¼·ÒëµÄºÜºÃ£¬²»¹ýÓÐЩÈ˵¹ÊÇÎÞÊÓ°æ¹æ£¬Ö±½ÓÓÃXX·ÒëÖ®ºóÌùÉÏÀ´ÁË¡« ÔÚcnki²éµÄ£¬±íÃæÎü¸½ÑõµÄº¬Á¿Ó¦¸ÃÊÇ£ºsurface adsorbed oxygen concentration£¬Æä¶ÔÓ¦µÄ±È½Ï¼¶´ÊÊÇhigher£»»¹ÓÐÆøÃôÐÔÒ²ÊÇÓõÄhigher....etc¡« µ±È»Å¼Ò²Ö»ÊÇËÀѧËÀÓ㬱Ͼ¹×¨ÒµËùÏÞ¡« ---------------±à¼Ïß------------- ·¢ÏÖÒѾÊǺþÃ֮ǰµÄÌû×ÓÁË....º¹... [ Last edited by demonlcy on 2008-5-6 at 21:55 ] |

7Â¥2008-05-04 12:31:56













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