| MnO_2和Fe_2O_3对氧化铝质压裂支撑剂微观结构和抗破碎能力的影响(英文) |
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| 引用本文： | 马雪,姚晓,华苏东,陈悦.MnO_2和Fe_2O_3对氧化铝质压裂支撑剂微观结构和抗破碎能力的影响(英文)[J].硅酸盐学报,2009,37(2). |
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| 作者姓名： | 马雪 姚晓 华苏东 陈悦 |
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| 作者单位： | 1. 南京工业大学材料科学与工程学院,南京,210009
2. 南京工业大学材料科学与工程学院,南京,210009;材料化学工程国家重点实验室,南京,210009 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 采用无压烧结技术制备了软锰矿掺杂的高强度氧化铝质压裂支撑剂.通过X射线衍射、压汞式孔隙分析、扫描电子显微镜和筒压法分别研究了由软锰矿引入的MnO2和Fe2O3对支撑剂物相组成、孔结构、晶粒尺寸和抗破碎能力的影响.结果表明:当软锰矿掺杂量为0～5%(质量分数,下同)时,烧结样品中包括氧化铝、莫来石和钛酸铝相,软锰矿的掺入未明显改变晶体结构;当软锰矿掺量为5%时,Fe3+取代Al3+与组分中的TiO2反应并形成固溶体,MnO2固溶于Al2O3晶粒中,促进了Al2O3晶粒生长,过剩的Fe2O3和MnO2存在于陶瓷晶界处并在高温煅烧F形成液相促进致密化烧结;未掺杂样品中存在大量连通气孔,显气孔率为14.79%:掺入5%软锰矿后,显气孔率降低至5.29%,样品内部多为均匀分布的近球形闭气孔;在52MPa压力条件下,5%软锰矿掺杂样品的破碎率与未掺杂样品相比减少80.95%,抗破碎能力显著提高.
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| 关 键 词： | 氧化铝 压裂支撑剂 软锰矿 孔径分布 抗破碎能力 氧化锰 |
EFFECTS OF MnO_2 AND Fe_2O_3 ON MICROSTRUCTURE AND CRUSH RESISTANCE OF ALUMINA MATRIX FRACTURING PROPPANT |
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| MA Xue,YAO Xiao,HUA Sudong,CHEN Yue.EFFECTS OF MnO_2 AND Fe_2O_3 ON MICROSTRUCTURE AND CRUSH RESISTANCE OF ALUMINA MATRIX FRACTURING PROPPANT[J].Journal of The Chinese Ceramic Society,2009,37(2). |
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| Authors: | MA Xue YAO Xiao HUA Sudong CHEN Yue |
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| Affiliation: | 1.College of Materials Science and Engineering;Nanjing University of Technology;Nanjing 210009;China;2.State Key Laboratory of Materials-Oriented Chemical Engineering;China |
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| Abstract: | Pyrolusite doped high-strength alumina matrix fracturing proppant was prepared by the technique of pressureless sintering.The effects of MnO2 and Fe2O3 introduced from pyrolusite on the phase composition,pore structure,grain size and crush resistance of proppants were studied by X-ray diffraction,mercury intrusion porosimetry,scanning electron microscopy and the column compres-sion method respectively.The results show that the samples mainly consist of alumina,mullite and aluminum titanate when the con-tent... |
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| Keywords: | alumina fracturing proppant pyrolusite pore size distribution crush resistance manganese oxide |
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