TiO_2-FeO-X(SiO_2,CaO,MgO)三元高钛渣导电特性及其熔体结构
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摘要
采用交流阻抗谱法,系统测试TiO_2-FeO-X(SiO_2,CaO,MgO)三元高钛渣导电性随各成分和温度的变化规律。研究表明:随温度升高,高钛渣电导率逐渐升高,电导率值在40～187S/cm之间。TiO_2-FeO-X(SiO_2,CaO,MgO)三元高钛渣电导率在高温下受电子-离子导电混合控制,具有明显的半导体性质,并且CaO、SiO_2、MgO氧化物的加入可以降低钛渣电导率。X射线衍射分析结果和热力学计算结果均表明高钛渣凝固后的主要物相为黑钛石(Fe,Ca,Mg)_xTi_yO_5和金红石TiO_2。
The effects of temperature and slag compositions on electrical conductivity of TiO_2-FeO-X(SiO_2,CaO,MgO)ternary high titania slag were measured accurately by AC impedance method. The results show that the electrical conductivity of high titania slag, which is vary from 40 S/cm to 487 S/cm, increases with the increasing temperature. The electrical conductivity of TiO_2-FeO-X(SiO_2,CaO,MgO) ternary high titania slag is hybrid controlled by the electron-ionic conduction, which possesses obvious semiconductor property. The additions of SiO_2, CaO and MgO can decrease the electrical conductivity of high titania slag. X-ray diffraction analysis results and thermodynamic calculated results show that the predominate phase of the high titania slag are anosovite((Fe, Ca, Mg)xTiyO_5) and rutile(TiO_2).
The effects of temperature and slag compositions on electrical conductivity of TiO_2-FeO-X(SiO_2,CaO,MgO)ternary high titania slag were measured accurately by AC impedance method. The results show that the electrical conductivity of high titania slag, which is vary from 40 S/cm to 487 S/cm, increases with the increasing temperature. The electrical conductivity of TiO_2-FeO-X(SiO_2,CaO,MgO) ternary high titania slag is hybrid controlled by the electron-ionic conduction, which possesses obvious semiconductor property. The additions of SiO_2, CaO and MgO can decrease the electrical conductivity of high titania slag. X-ray diffraction analysis results and thermodynamic calculated results show that the predominate phase of the high titania slag are anosovite((Fe, Ca, Mg)xTiyO_5) and rutile(TiO_2).
引文
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[2]胡克俊,锡淦,姚娟,席歆.国内钛渣科研及生产现状[J].中国材料进展,2007,26(3):7-15.HU Ke-jun,XI Gan,YAO Juan,XI Xin.Reasearch and production status of titanium slag in China[J].Materials China,2007,26(3):7-15.
[3]LIU J H,ZHANG G H,WANG Z.Experimental study on electrical conductivity of MnO-CaO-SiO2 slags at 1723K to1823K(1450℃to 1550℃)and various oxygen potentials[J].Metallurgical and Materials Transactions B,2017:1-5.
[4]BARATIA M,COLEY S.Electrical and electronic conductivity of CaO-SiO2-FeOx slags at various oxygen potentials:Part I.Experimental results[J].Metallurgical&Materials Transactions B,2006,37(1):41-49.
[5]BARATIA M,COLEY S.Electrical and electronic conductivity of CaO-SiO2-Fe Ox slags at various oxygen potentials:Part II.Mechanism and a model of electronic conduction[J].Metallurgical&Materials Transactions B,2006,37(1):51-60.
[6]LIU J H,ZhANG G H,ChOU K C.Electronic/ionic properties of Fex O-Si O2-CaO-Al2O3 slags at various oxygen potentials and temperatures[J].ISIJ International,2015,55(11):2325-2331.
[7]ZHANG G H,LIU J H,CHOU K C.Study on electrical conductivity of CaO-SiO2-Al2O3-FeOx slags[C]//Proceedings of the 10th international conference on molten slags,fluxes and salts.Cham:Springer International Publishing,2016:1335-1342.
[8]LIU J H,ZhANG G H,CHOU K C.Study on electrical conductivity of FeO-CaO-SiO2-Al2O3 slags[J].Canadian Metallurgical Quarterly,2016(2):755-760.
[9]XIONG G,LI F S,LI F,CHOU K C.Study on electronic conductivity of CaO-SiO2-Al2O3-Fe Ox slag system[J].Transactions of Nonferrous Metals Society of China,2000,7(1):9-13.
[10]MORI K.The electrical conductivity of molten slags containing titanium-oxide(I):Na2O-Si O2-TiO2 system[J].Tetsu-to-Hagane,1956,42(8):633-638.
[11]MORI K.The electrical conductivity of the CaO-SiO2-Ti O2system and the behaviour of titanium-oxide:The electrical conductivity of molten slags containing titanium-oxide IV[J].Tetsu-to-Hagane,1960,46(2):134-140.
[12]WANG S L,LI G Q,LOU T P,SUI Z T.The conductivity and the crystallization of perovskite(CaTiO3)from Ti-bearing blast furnace slag studied by AC.impedance method[J].Transactions of the Iron&Steel Institute of Japan,2007,39(11):1116-1119.
[13]LIU J H,Zh ANG G H,YUE D W,Ch OU K C.Electrical Conductivityand electronic/ion-ic properties of TiOx-CaO-SiO2slags at various oxygen potentials and temperatures[J].Metallurgical and Materials Transactions B,2015,47(1):1-6.
[14]石玉洪,王金超.含TiO2炉渣电导性的研究[J].钢铁钒钛,1987(1):60-64.SHI Yu-hong,WANG Jin-chao.Study on the electrical conductivity of TiO2-bearing[J].Iron Steel Vanadium Titanium,1989(1):60-64.
[15]鲁雄刚,李福焱,李丽芬,周国志.交流阻抗谱在炉渣电导率测定中的应用[J].中国有色金属学报,2000,10(3):437-439.LU Xiong-gang,LI Fu-yan,LI Li-fen,CHOU Guo-zhi.Application of AC impedance for measuring resistance of slag[J].Transcations of Nonferrous Metals Society of China,2000,10(3):437-439.
[16]薛向欣,张辉,赵娜,王淑兰.TiC颗粒对CaO-SiO2-Mg O-Al2O3-TiO2炉渣电导率的影响[J].东北大学学报(自然科学版),2004,25(9):870-872.XU Xiang-xin,ZHANG Hui,ZHAO Na,WANG Shu-lan.Effect of TiC particles on conductivity of CaO-SiO2-MgO-Al2O3-Ti O2quasi-quinary slag[J].Journal of Northeasten University,2004,25(9):870-872.
[17]戴曦,张传福.Fe O-MgO-CaO-SiO2系炉渣电导的测定与研究[J].有色金属(冶炼部分),2005(4):2-4.DAI Xi,ZHANG Chuan-fu.Measurement and study on the electrical conductivity of FeO-MgO-CaO-SiO2 slags[J].Noferrous Material(Extravtive Metallurgy),2005(4):2-4.
[18]武杏荣,马报,吕辉鸿,李辽沙.含Cr2O3不锈钢熔渣导电性的研究[J].安徽工业大学学报(自科版),2016,33(1):5-9.WU Xing-rong,MA Bao,LüHui-hong,LI Liao-sha.Reasearch on the electrical conductivity of Cr2O3-bea-ring stainless steel slags[J].Journal of Anhui University Technology(Natural Science Edition),2016,33(1):5-9.
[19]程立.关于钛铁矿精矿的成分与性质对熔炼过程影响的研究[J].贵州工业大学学报(自然科学版),1980(1):43-54.CHENG Li.Study on the influence of the composition and properties of titanium ore conc-entrate on smelting process[J].Journal of Guizhou University of Technology(Natural Science Edition),1980(1):43-54.
[20]李生平,吕学伟,宋兵,缪辉俊,韩可喜.TiO2-FeO-(SiO2,CaO,MgO)三元渣系的流变特性[J].中国有色金属学报,2016,26(9):2015-2022.LI Sheng-pin,LüXue-wei,SONG Bing,MIAO Hui-jun,HANKe-xi.Rheological property of Ti O2-FeO-(SiO2,CaO,MgO)ternary slag[J].Transactions of Nonferrous Metals Society of China,2016,26(9):2015-2022.
[21]巨建涛,吕振林,焦志远,赵俊学.Ca F2-SiO2-Al2O3-CaO-MgO渣电导率的研究[J].钢铁研究学报,2012,24(8):27-31.JU Jian-tao,LüZhen-lin,JIAO Zhi-yuan,ZHAO Jun-xue.Study on the electrical conductivity of CaF2-Si O2-Al2O3-CaO-MgOslag[J].Journal of Iron and Steel Reasearch,2012,24(8):27-31.
[22]EAV F,SCZANCOSKI J C,CAVALCANTE L S,PARIS E C,ESPINOSA J W M.Photoluminescencebehavior in MgTiO3powders with vacancy/distorted clusters and octahedral tilting[J].Mate-rials Chemistry and Physics,2009,117(1):192-198.
[23]王珺.CaF2-Al2O3-Ca O-SiO2-TiO2渣系成分对其物理化学性质影响的研究[D].武汉:武汉科技大学,2015.WANG Jun.Study on the influence of the components of Ca F-Al2O3-Ca O-SiO2-Ti O2 on its physical and chemical properties[D].Wuhan:Wuhan University of Science and Technology,2015.