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- 침상형 5Mg(OH)2·MgSO4·3H2O 형성에 관한 MgO와 NH4OH 영향
- 유리, 피재환, 김형태, 김경자, 김영웅, 김웅, 김유진
- Effect of MgO and NH4OH on Formation of 5Mg(OH)2·MgSO4·3H2O Whiskers
- Ri Yu, Jae-Hwan Pee, Hyung-Tae Kim, Kyung-Ja Kim, Young-Woong Kim, Woong Kim, Yoo-Jin Kim
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Journal of Korean Powder Metallurgy Institute 2011;18(3):283-289
DOI: https://doi.org/10.4150/KPMI.2011.18.3.283
2한국세라믹기술원, 엔지니어링 세라믹센터
3한국세라믹기술원, 엔지니어링 세라믹센터
4한국세라믹기술원, 엔지니어링 세라믹센터
5태진지엔에스
6고려대학교 신소재공학과
7한국세라믹기술원, 엔지니어링 세라믹센터
1Engineering ceramic center, Korea Institute of Ceramic Engineering & Technology
2Engineering ceramic center, Korea Institute of Ceramic Engineering & Technology
3Engineering ceramic center, Korea Institute of Ceramic Engineering & Technology
4Engineering ceramic center, Korea Institute of Ceramic Engineering & Technology
5TAEJIN GnS Co., LTD.
6Department of Materials Science and Engineering, Korea University
7Engineering ceramic center, Korea Institute of Ceramic Engineering & Technology
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Abstract
Magnesium hydroxide sulfate hydrate whiskers (5Mg(OH)_2cdotMgSO_4cdot3H_2O, abbreviated 513 MHSH) were prepared using hydrothermal reaction with magnesium oxide (MgO) and magnesium sulfate (MgSO_4cdot7H_2O) as the starting materials. The effects of the molar ratio of MgSO_4/MgO and amount of NH_4OH were studied. As a result, 513 MHSH whiskers co-existed with hexagonal plate Mg(OH)_2 at low concentration of SO_42-. The molar ratio of MgSO_4cdot7H_2O/MgO was 7:1, uniform 513 MHSH whiskers were formed without impurity such as Mg(OH)_2. Appropriate amount of NH_4OH has affected to formation of high quality MHSH. Their morphologies and structures were determined by powder X-ray diffraction (XRD) scanning electron microscopy (SEM) and thermo-gravimetric analyzer (TGA).
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