Calcium ferrite compounds were prepared using calcium nitrate and iron nitrate with different molar ratios, 1:1, 0.5:1, and 1:0.5,respectively. The reactions of formation were investigated at different temperatures following the differential thermal analysis (DTA) results. Calcium ferrite compounds are CaFeO3, Ca2FeO3.5, Ca2Fe2O5, CaFe2O4, CaFe4O7, Ca7.2Fe0.8Fe30O53,Ca3Fe15O25, Ca4Fe14O25, and Ca4Fe9O17. Other reactive species of calcium nitrate are still present after firing at 450℃.Compounds were characterized using X-ray diffraction (XRD), DTA, TG, magnetic susceptibility, infrared spectra and scanning electron microscope (SEM). It is concluded that the formation mechanism of Ca-ferrite compounds depends mainly on the valency of iron cations which in role depends on its molar ratio and the existing atmosphere.
参考文献
| [1] | DCerovic;IMomcilovic;SJKiss.[J].Journal of Materials Science,1972(07):735. |
| [2] | TNishida;YTakashima .[J].Nuclear Instruments and Methods in Physics Research B:Beam Interaction with Materials and Atoms,1993,76:397. |
| [3] | TTFang;JBHwang .[J].Journal of the American Ceramic Society,1992,75:915. |
| [4] | TTFang;HBLin;KTLee .[J].Journal of the American Ceramic Society,1988,71:368. |
| [5] | JOrewczyk .[J].Journal of Thermal Analysis,1990,36:2153. |
| [6] | EFOsorn.Phase Equilibrium Studies of Steel Plant Refractories Systems[M].American Iron , Steel Institute, New York,1954:145-77. |
| [7] | EMillon;BMalaman;ABonazebi;JFBrice, RGerardin , OEvrard .[J].Materials Research Bulletin,1986,21:985. |
| [8] | KVidyasagar;JGopalakrishnan;CNRRao .[J].Inorganic Chemistry,1984,23:1206. |
| [9] | MTakano;YTakeda .[J].Bulletin of the Institute for Chemical Research(Kyoto University),1983,61:406. |
| [10] | HChessin;ETTurkdogan .[J].Journal of the American Ceramic Society,1962,45:597. |
| [11] | Phillips;AMuan .[J].Journal of the American Ceramic Society,1958,41:445. |
| [12] | YTakeda;SNaka;MTakano;TShinjo, TTakada , MShimada .[J].Materials Research Bulletin,1978,13:61. |
| [13] | AAHanna;MSKhalil;HISaleh .[J].J Chem,1997,40:485. |
| [14] | H.I.Saleh .Studies on progressive reaction leading formations of different types of barium ferrites[J].Journal of Materials Science & Technology,1999(2):159-163. |
| [15] | HISaleh .[J].Journal of the Chinese Chemical Society,2002,49:341. |
| [16] | FKanamaru;HMiyamoto;YMimura;MKoizumi, MShimada, SKume , SShin .[J].Materials Research Bulletin,1970,5:1970. |
| [17] | FDecker;JSKasper.[J].Acta Crystallographica,1957(10):332. |
| [18] | Jerggren .[J].Acta Chemica Scandinavica,1971,25:3616. |
| [19] | SShin;YHatakeyama;KOgawa;KShimomura .[J].Materials Research Bulletin,1979,14:133. |
| [20] | HHughes;PRoos;DCGoldring .[J].Mineralogical Magazine,1967,36:280. |
| [21] | Praun;WKwestroo .[J].Philips Research Reports,1960,15:394. |
| [22] | SHolmquist .[J].Nature,1960,185:604. |
| [23] | MAsada;YOmari;KSanbongi .[J].Transactions of the Iron and Steel Institute of Japan,1968,8:245. |
| [24] | Malaman;HAlebouyeh;ACourtois;RGerardin , OEvrard .[J].Materials Research Bulletin,1982,17:795. |
| [25] | FAMiller;CHWilkins .[J].Journal of Analytical Chemistry,1952,8:1253. |
| [26] | FAMiller;GLGarlson;FFBentley;WHJones .[J].Spectrochimica Acta,1960,16:135. |
| [27] | MTakano;NNakanishi;YTakeda;SNaka ,TTakada .[J].Materials Research Bulletin,1977,12:923. |
| [28] | Aelov;EVGorozhankin;VNEfremov;NSSal'nikova,ALSuris .[J].Russian Journal of Inorganic Chemistry,1985,30:1436. |
| [29] | SGordon;CCampbell .[J].Analytical Chemistry,1955,27:1102. |
| [30] | KRPoeppelmeier;MELeonowicz;JMLongo .[J].Journal of Solid State Chemistry,1982,44:89. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%