La~(3+)和Ce~(4+)对尾矿微晶玻璃显微结构及性能的影响
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摘要
选用白云鄂博尾矿及粉煤灰为主要原料,采用熔融法制备得到了Ca O-Al_2O_3-Mg O-SiO_2(CAMS)系尾矿微晶玻璃。借助差热分析、X射线衍射以及扫描电子显微镜、维氏硬度仪等研究了La_2O_3和CeO_2对尾矿微晶玻璃析晶行为、显微结构及性能的影响。结果表明,添加La_2O_3和CeO_2后尾矿微晶玻璃的主晶相均未发生改变,但稀土的添加会诱导微晶玻璃内产生元素集聚体。聚集体内Si元素分布均匀,稀土元素以及Al、Na聚集,元素Ca和Fe缺失。聚集体的形成致密化玻璃网络结构,从而增加裂纹扩展阻力,消耗裂纹扩展过程中的能量,抑制裂纹的扩展并最终提高材料的维氏硬度。
Tailing glass-ceramics in the Ca O-Al2 O3-Mg O-SiO_2( CAMS) quaternary system were produced by melting method,using solid waste such as Bayan Obo mine tailing and fly ash as main sources of raw materials. Effect of La_2O_3 and CeO_2 on the crystallization behavior,microstructure and properties of glass-ceramics samples were analyzed by means of differential thermal analysis, X-ray diffraction,scanning electron microscopy and Vickers hardness tester. The results show that the main phase was almost no change by adding La_2O_3 or CeO_2,but the element aggregates can be formed by rare earth ions.The distribution of Si elements in aggregates was uniform,while the accumulation of rare earth elements and Al and Na and the absence of Ca,and Fe elements can be observed in aggregates. As a result,the densification of glass network can be increased. The formation of aggregates can increase crack growth resistance,consume energy in crack propagation process, inhibit crack propagation and ultimately improve the Vickers hardness.
Tailing glass-ceramics in the Ca O-Al2 O3-Mg O-SiO_2( CAMS) quaternary system were produced by melting method,using solid waste such as Bayan Obo mine tailing and fly ash as main sources of raw materials. Effect of La_2O_3 and CeO_2 on the crystallization behavior,microstructure and properties of glass-ceramics samples were analyzed by means of differential thermal analysis, X-ray diffraction,scanning electron microscopy and Vickers hardness tester. The results show that the main phase was almost no change by adding La_2O_3 or CeO_2,but the element aggregates can be formed by rare earth ions.The distribution of Si elements in aggregates was uniform,while the accumulation of rare earth elements and Al and Na and the absence of Ca,and Fe elements can be observed in aggregates. As a result,the densification of glass network can be increased. The formation of aggregates can increase crack growth resistance,consume energy in crack propagation process, inhibit crack propagation and ultimately improve the Vickers hardness.
引文
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[2]Ye C Q,He F,Shu H,et al.Preparation and properties of sintered glass-ceramics containing Au-Cu tailing waste[J].Materials&design,2015,86:782-787.
[3]Pan D A,Li LL,Wu Y F,et al.Characteristics and properties of glass-ceramics using lead fuming slag[J],Journal of Cleaner Production,2018,175:251-256.
[4]Li H X,Li B W,Deng L B,et al.Microwave-assisted processing of graded structural tailing glass-ceramics[J].Journal of the European Ceramic Society,2018,38(6):2632-2638.
[5]Deng L B,Zhang X F,Zhang,M X,et al.Effect of Ca F2on viscosity,structure and properties of Ca O-Al2O3-Mg O-Si O2slag glass ceramics[J].Journal of Non-Crystalline Solids,2018,500:310-316.
[6]Zhang H X,Du Y S,Yang X W,et al.Influence of rare earth ions on metal ions distribution and corrosion behavior of tailing-derived glassceramics[J].Journal of Non-Crystalline Solids,2018,482:105-115.
[7]Temuujin J,Bayarzul U,Surenjav E,et al.Influence of cerium oxide(Ce O2)addition on the mechanical properties of glass ceramics precursor prepared from fly ash[J].Journal of Ceramic Processing Research,2017,18(2):112-115.
[8]Chen G H,Song J,Kang X L,et al.Improved discharged energy density for niobate-based B2O3system glass-ceramics by Ce O2addition[J].Materials Letters,2014,136(1):302-305.
[9]Zhou H L,Feng K Q,Chen C H,et al.Influence of Ce O2addition on the preparation of foamed glass-ceramics from high-titanium blast furnace slag[J].International Journal of Minerals,Metallurgy and Materials,2018,25(6):689-695.
[10]陈华,李保卫,赵鸣,等.La3+存在形式对白云鄂博稀选尾矿微晶玻璃性能的影响[J].物理学报,2015,64(19):196201:1-8.
[11]陈华,李保卫,赵鸣,等.Ce O2含量对白云鄂博西尾矿为原料制备的微晶玻璃力学性能的影响[J].硅酸盐学报,2015,43(7):1002-1007.
[12]迟玉山,沈菊云,陈学贤,等.La2O3在Mgo-Al2O3-Si O2-Ti O2微晶玻璃中的作用[J].无机材料学报,2002,17(2):348-352.
[13]罗志伟,卢安贤,韩立国.La2O3掺杂对二硅酸锂微晶玻璃析晶行为和力学性能的影响[J].中国有色金属学报,2009,19(11):2018-2023.
[14]Wang J,Liu C,Zhang G K,et al.Crystallization properties of magnesium aluminosilicate glass-ceramics with and without rare-earth oxides[J].Journal of Non-Crystalline Solids,2015,419:1-5.
[15]杜永胜,杨晓薇,张红霞,等.稀土La2O3对尾矿微晶玻璃显微结构和裂纹扩展行为的影响[J].材料研究学报,2018,32(2):97-104.
[16]Du Y S,Yang X W,Zhang H X,et al.Effect of treatment on the crystallization toughening of tailing-derived glass-ceramics[J].Journal of Ceramic Processing Research,2016,17(12):1243-1248.
[17]Iftekhar S,Grins J,Eden M.Composition-property relationships of the La2O3-Al2O3-Si O2glass system[J].Journal of Non-Crystalline Solids,2010,356:1043-1048.
[18]James E S,Jeffrey T K.Rare-earth aluminosilicate glasses[J].Journal of the American Ceramic Society,1990,73:39-42.
[19]Hu A M,Liang K M,Zhou F,et al.Phase transformations of Li2O-Al2O3-Si O2glasses with Ce O2addition[J].Ceramics International,2005,31:11-14.
[20]Li B W,Du Y S,Zhang X F,et al.Crystallization characteristics and properties of high-performance glass-ceramics derived from Baiyunebo east mine tailing[J].Environmental Progress&Sustainable Energy,2015,34(2):420-426.
[21]Garai M,Karmakar B.Rare earth ion controlled crystallization of mica glass-ceramics[J].Journal of Alloys and Compounds,2016,678:360-369.
[22]Goel A,Tulyaganov D U,Kharton V V,et al.The effect of Cr2O3addition on crystallization and properties of La2O3-containing diopside glassceramics[J].Acta Materialia,2008,56(13):3065-3076.
[23]Schaller T,Stebbins J F,Wilding M C.Cation clustering and formation of free oxide ions in sodium and potassium lanthanum silicate glasses:nuclear magnetic resonance and Raman spectroscopic findings[J].Journal of Non-Crystalline Solids,1999,243(2-3):146-157.
[24]Sasmal N,Garai M,Karmakar B.Influence of Ce,Nd,Sm and Gd oxides on the properties of alkaline-earth borosilicate glass sealant[J].Journal of Asian Ceramic Societies,2016,4(1):29-38.