全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

氢氧化镁热分解法制备活性氧化镁(英文)

Full-Text   Cite this paper   Add to My Lib

Abstract:

以氢氧化镁为原料通过热分解法制备了活性氧化镁粉体。利用X射线衍射仪、扫描电镜、压汞仪和热分析仪对粉体进行了表征。结果表明氢氧化镁通过一步分解生成氧化镁,质量损失率为30.8%,与理论计算质量损失率相吻合。当煅烧温度从400℃增加到600℃,颗粒状氢氧化镁分解生成片状氧化镁。当煅烧温度为550℃,保温10min后,氢氧化镁完全分解,吸碘值达到最大值,为83.6mg/g。

References

[1]  WANG J A,NOVARO O,BOKHIMI X,et al.Characterizations of the thermal decomposition of brucite prepared by sol-gel technique for synthesis of nanocrystalline MgO[J].Mater Lett,1998,35(5/6):317-323. [2]BIRCHAL V S S,ROCHA S D F,CIMINELLI V S T.Effect of mag-nesite calcination conditions on magnesium oxide hydration[J].Miner Eng,2000,13(14/15):1629-1633. [3]MANIOCHA M L.Magnesium oxide:moving beyond refractories[J].Miner Eng,1997,49(2):26-29. [4]MIRONYUK I F,GUN'KO,V M,POVAZHNYAK M O,et al.Magne-sium oxide formed on calcination of Mg(OH)2prepared from natural bischofite[J].Appl Surf Sci,2006,252(12):4071-4082. [5]GREEN J.Calcination of precipitated Mg(OH)2to active MgO in the production of refractory and chemical grade MgO[J].J Mater Sci,1983,18(3):637-651. [6]MOODIE A F,WARBLE C E.MgO morphology and the thermal transformation of Mg(OH)2[J].J Cryst Growth,1986,74(1):89-100. [7]KIM M G,DAHMEN U,SEARCY A W.Structural transformations in the decomposition of Mg(OH)2and MgCO3[J].J Am Ceram Soc,1987,70(3):146-154. [8]NAONO H.Micropore formation due to thermal decomposition of magnesium hydroxide[J].Colloids Surf,1989,37:55-70. [9]THANGARAI N,WESTMACOTT K H,DAHMEN U,et al.HVEM studies of the sintering of MgO nanocrystals prepared by Mg(OH)2decomposition[J].Ultramicroscopy,1991,37(1-4):362-374. [10]KIM M G,DAHMEN U,SEARCY A W.Shape and size of crystalline MgO particles formed by the decomposition of Mg(OH)2[J].J Am Ceram Soc,1988,71(8):C373-C375.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133