Nd<sub>2</sub>O<sub>3</sub>优化白云鄂博西尾矿微晶玻璃性能机理*

doi:10.11901/1005.3093.2014.681

材料研究学报

2015, Vol. 29

Issue (11): 874-880 DOI: 10.11901/1005.3093.2014.681

本期目录 | 过刊浏览

Nd₂O₃优化白云鄂博西尾矿微晶玻璃性能机理*

李保卫¹,何晓宇^1,²,陈华^1,³(

),赵鸣¹,孙凯宇^1,²

1. 内蒙古科技大学内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室包头 014010
2. 内蒙古科技大学材料与冶金学院包头 014010
3. 内蒙古科技大学数理与生物工程学院包头 014010

Influence of Nd₂O₃ Addition on Performance of Glass-ceramics Synthesized with Tailings of Bayan-Obo West Mine

Baowei LI¹,Xiaoyu HE^1,²,Hua CHEN^1,^3,^**(

),Ming ZHAO¹,Kaiyu SUN^1,²

1. Key laboratory of Integrated Exploitation of Bayan Obo Multi Metal resources, Inner Mongolia University of Science and Technology, Baotou 014010, China
2. School of Material and Metallurgy, Inner Mongolia University of Science and Technology,Baotou 014010, China
3. School of Mathematics, Physics and Biological Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China

引用本文:

李保卫,何晓宇,陈华,赵鸣,孙凯宇. Nd₂O₃优化白云鄂博西尾矿微晶玻璃性能机理*[J]. 材料研究学报, 2015, 29(11): 874-880.
Baowei LI, Xiaoyu HE, Hua CHEN, Ming ZHAO, Kaiyu SUN. Influence of Nd₂O₃ Addition on Performance of Glass-ceramics Synthesized with Tailings of Bayan-Obo West Mine[J]. Chinese Journal of Materials Research, 2015, 29(11): 874-880.

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摘要:

以白云鄂博西尾矿为主要原料, 用熔铸法制备了添加(0-8.73)% (质量分数, 下同)Nd₂O₃的CaO-Al₂O₃-MgO-SiO₂(CAMS)系微晶玻璃。用DTA、XRD、FEGSEM+EDS+EBSD、综合力学性能仪等手段研究了外加Nd₂O₃优化所制备微晶玻璃显微结构及性能的机理。结果表明: 随着Nd₂O₃含量的提高, 主晶相Ca(Mg, Al, Fe)Si₂O₆(辉石)逐渐细化, 是主晶相晶界析出的Ca₂Nd₈(SiO₄)₆O₂相的阻碍作用和这种富Nd第二相在生长过程中对Ca离子的争夺所致。Nd₂O₃添加量为2.21%时样品的综合性能最佳, 其密度、抗折强度和耐酸碱分别为3.20 g/cm³、200 MPa、95.22%和99.23%。

关键词 ：无机非金属材料, 微晶玻璃, 白云鄂博西尾矿, Nd₂O₃

Abstract：

Glass ceramics of CaO-Al₂O-MgO-SiO₂ (CAMS) with addition of 0-8.73%(mass fraction) Nd₂O₃ were synthesized mainly with the tailings of Bayan-Obo west mine by melting-casting method. The influence of the amount of Nd₂O₃ on the microstructure and properties of the glass ceramics was systematically investigated by DTA, XRD, FEGSEM equipped with EDS EBSD attachments and universal mechanical properties tester. The results show that the average grain size of the primary crystalline phase, augite (Ca(Mg, Al, Fe)Si₂O₆), decreases with the increase amount of Nd2O3 addition, and the main reason can be ascribed to the hindering effects of Ca₂Nd₈(SiO₄)₆O₂ particles and the consumption of Ca²⁺ ions by the formation this newly formed Nd-rich phase on the grain growth of augite crystals during the heattreatment process. The glass ceramics with 2.21% Nd₂O₃ shows the optimal properties, i.e. of which the density, bending strength and the resistance to acid or alkali corrosion are 3.20 g/cm³, 200 MPa, 95.22%and 99.23%, respectively.

Key words： inorganic non-metallic materials glass ceramics Bayan Obo west mine tailing Nd₂O₃

收稿日期: 2014-11-18

基金资助:* 国家重点基础研究发展计划2012CB722802和内蒙古科技重大专项414060901资助项目。

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https://www.cjmr.org/CN/10.11901/1005.3093.2014.681 或 https://www.cjmr.org/CN/Y2015/V29/I11/874

表1 添加(0-8.73)%Nd2O3的基础玻璃配方(质量分数, %)

图1 添加(0-8.73% )Nd2O3水淬基础玻璃的DTA曲线

图2 添加(0-8.73%)Nd2O3微晶玻璃的XRD图谱

图3 添加(0-8.73)%Nd2O3的微晶玻璃的背散射电子(BSE)SEM图

图4 第二相位置和第二相EDS结果

图5 EBSD花样和菊池花样标定结果

图6 C6样品中主晶相在x, y和z三个坐标轴方向上的反极图

表2 添加0-8.73%Nd2O3微晶玻璃性能比较

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