Synthesis of dehydrated magnesium borate powders and the effect on the properties of MgO-C refractories
0
조회
0
다운로드
3
인용
0
참고문헌
키워드
초록
For the synthesis of magnesium borate powder, magnesium carbonate and boric acid powders were mixed in ethanol and theninvestigated by differential thermal analysis (DTA) and thermogravimetry (TG). X-ray diffraction (XRD) results of thesamples showed the formation of Mg2B2O5 phase at 500 oC and Mg3B2O6 at 650 oC. The synthesized powder used as anantioxidant additive in magnesia-graphite bodies containing 20% graphite. After curing at 200 oC and firing at 1200 oC and1400 oC for 2 hrs in a coke bed environment, its physical and mechanical properties and also microstructural features wereinvestigated. The results showed that after curing at 250 oC, the addition of magnesium borate led to an increase in coldcrushing strength at about 20%. Comparing the samples with additives and without any additives at 1200 and 1400 oC showedthat the cold crushing strengths were improved about 45%, 35%, respectively. In addition, the results clarified that magnesiumborate (Mg3B2O6) phase led to improve oxidation resistance.
Abstract
For the synthesis of magnesium borate powder, magnesium carbonate and boric acid powders were mixed in ethanol and theninvestigated by differential thermal analysis (DTA) and thermogravimetry (TG). X-ray diffraction (XRD) results of thesamples showed the formation of Mg2B2O5 phase at 500 oC and Mg3B2O6 at 650 oC. The synthesized powder used as anantioxidant additive in magnesia-graphite bodies containing 20% graphite. After curing at 200 oC and firing at 1200 oC and1400 oC for 2 hrs in a coke bed environment, its physical and mechanical properties and also microstructural features wereinvestigated. The results showed that after curing at 250 oC, the addition of magnesium borate led to an increase in coldcrushing strength at about 20%. Comparing the samples with additives and without any additives at 1200 and 1400 oC showedthat the cold crushing strengths were improved about 45%, 35%, respectively. In addition, the results clarified that magnesiumborate (Mg3B2O6) phase led to improve oxidation resistance.
참고문헌 (28)
- S. Zhang, , J. Eur. Ceram. Soc., 21(13), pp.2393~2405 (2001)[DOI]
- A. Boehm, , J. Ceram. Sci. Technol., 7(2), pp.155~164 (2016)
- S. Pal, , Trans. Indian Ceram. Soc., 67(4), pp.203~210 (2008)[DOI]
- B. Hashemi, , Ceram. Int., 32(3), pp.313~319 (2006)[DOI]
- E.M.M. Ewais, , J. Ceram. Soc. Japan., 112(1310), pp.517~532 (2004)[DOI]
- S.K Nandy, , Adv. Appl. Ceram., 104(6), pp.306~311 (2005)[DOI]
- T.B. Zhu, , J. Ceram. Sci. Technol., 7(1), pp.127~134 (2016)
- W. Silveira, , Low Carbon Economy, 3(3A), pp.83~91 (2012)[DOI]
- T. Wang, , J. Am. Ceram. Soc., 84(3), pp.577~582 (2001)[DOI]
- C.P.N Freire, , Refract. Worldforum, 6(2), pp.89~92 (2014)
- K.S. Campos, , Ceram. Int., 38(7), pp.5661~5667 (2012)[DOI]
- A.F. Qasrawi, , Mater. Res. Bull., 40(4), pp.583~589 (2005)[DOI]
- W. Zhu, , Nanoscale Res. Lett., 4(7), pp.724~731 (2009)[DOI]
- W. Zhu, , Chem. Lett., 35(10), pp.1158~1159 (2006)[DOI]
- W. R. Peter, "U.S. Patent application 2,758,094", ~ (1956)
- G.B. Edward, "U.S. Patent application 2,889,266", ~ (1959)
- A.M. Alper, "U.S. Patent application 3,337,353", ~ (1967)
- A. S. Kipcak, , Adv. Mater. Sci. Eng., pp.1~9 (2014)
- S. Li, , Mater. Lett., 64(2), pp.151~153 (2010)[DOI]
- E. M. Elssfah, , Mater. Lett., 61(22), pp.4358~4361 (2007)[DOI]
- T. IBROSKA, , Turkish J. Chem., 39(5), pp.1025~1037 (2015)[DOI]
- M.N. Rahaman, "Wiley Online Library", pp.341~343 (2003)
- A.S. Gokce, , Ceram. Int., 34(2), pp.323~330 (2008)[DOI]
- A.Roinne, "HSC Chemistry, Thermodynamic software", ~ (1974)
- M. Rigaud, , Unitecr'91. Unified Int. Technical Conf. Refractories. Global Advances in Refractories, 23(26) (1991)
- S. Irie, , pp.503~515 (2010), Springer Berlin Heidelberg
- A. Yamaguchi, , Int. J. Appl. Ceram., 4(6), pp.490~495 (2007)[DOI]
- S. Palco, , J. Can. Ceram. Soc., 63(4), pp.261~265 (1994)