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球形非晶SiO2的制备及填充性能
作者:王建军 郝俊杰 郭志猛 王松 毛瑞奇 
单位:北京科技大学新材料技术研究院 北京 100083 
关键词:关键词:球形二氧化硅 感应耦合等离子体 数值模拟 环氧树脂塑封料 填充性能 
分类号:中图分类号:TF123
出版年,卷(期):页码:2014,42(10):0-0
DOI:
摘要:

摘  要:以不规则形状熔融石英粉为原料,通过Ar-H2感应耦合等离子体技术制备球形硅微粉,并结合数值模拟研究加料速率对粉末球化率的影响。同时,将球化前后的粉体与环氧树脂、固化剂、固化促进剂按不同比例经机械搅拌混合、超声分散和升温固化后制备得到环氧塑封材料。对球化处理前后粉末的形貌、物相、纯度和填充性能进行测试和分析。结果表明:经等离子球化处理后可得到表面光滑、分散性好、球化率100%的球形硅微粉。随加料速率的增加,石英粉的球化率降低。经等离子体处理后,粉体的松装密度、振实密度和流动性得到显著改善:松装密度由0.62 g/cm3提高到0.91 g/cm3,振实密度从0.92 g/cm3提高到1.23 g/cm3,粉末流动性提高到76 s/(50 g)。同时,等离子体处理使粉末纯度提高到99.95%。与原始粉相比,球形硅微粉具有更高的填充量,当球形硅微粉填充量为75%时,环氧塑封料的线膨胀系数为10.1×10-6/℃。

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Abstract: Spherical silica particles were prepared via Ar-H2 inductively coupled plasma with irregular fused silica powder. The effect of feeding rate on the spheroidization efficiency was investigated by modeling. The epoxy resin, curing agent, curing accelerator, ordinary silica and spherical silica were mixed at different proportions to prepare a silica/epoxy resin composite under ultrasonic dispersion and heating curing. The phase composition, morphology, particle size, purity and filling properties of the particles before and after spheroidization were characterized. The results show that the silica particles after plasma processing have well-dispersity and smooth surfaces, and their spheroidization ratio is almost 100%. The loose density, tap density and powder flowability increase after plasma treatment. The loose density increases from 0.62 g/cm3 to 0.91 g/cm3 and the tap density increases from 0.92 g/cm3 to 1.23 g/cm3. The powder flowbility increases to 76 s/(50g). The spheroidization ratio of silica powders decreases gradually with increasing the feeding rate. Furthermore, the purity after plasma process increases to 99.95%. Compared to ordinary silica powder, the spherical silica powder has a greater filling level. The thermal expansion coefficient of spherical silica/epoxy resin composite is 10.1×10-6/℃ when the spherical silica content in the composite is 75%.

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基金项目:
基金项目:国家自然科学基金资助项目(51274039);高等学校博士学科点专项科研基金博导类资助课题(20120006110007)。
作者简介:
第一作者:王建军(1986—),男,博士研究生。
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参考文献:

参考文献:
[1] PREGHENELLA M, PEGORETTI A, MIGLIARESI C. Ther-mo-mechanical characterization of fumed silica-epoxy nanocomposites [J]. Polymer, 2005, 46(26): 12065–12072.
[2] Hurley J M. Estimating the engineering properties of electronic pack-aging materials [J]. IEEE Trans. Compon Pack Technol, 2008, 31(2): 417–424.
[3] TEH P L, MARIATTI M, AKIL H M, et al. The properties of epoxy resin coated silica fillers composites [J]. Mater Lett, 2007, 61(11): 2156–2158.
[4] LIU Y L, LIN Y L, CHEN C P, et al. Preparation of epoxy resin/silica hybrid composites for epoxy molding compounds [J]. J Appl Polym Sci, 2003, 90(14): 4047–4053.
[5] JIN H Y, XU L, HOU S. Preparation of spherical silica powder by oxy-gen–acetylene ?ame spheroidization process [J]. J Mater Process Technol, 2010, 210(1): 81–84.
[6] KUMAR S, SELVARAJAN V, PADMANABHAN P V A, et al. Spheroidization of metal and ceramic powders in thermal plasma jet: Comparison between experimental results and theoretical estimation [J]. J Mater Process Technol, 2006, 176(1): 87–94.
[7] DIGNARD N M, BOULOS M I. Sphericity analysis method for the induction plasma processing of powders [C] //Proceedings of the ISPC 14, Prague, Czech, 1999, 2211–2217.
[8] PARK H K, PARK K Y. Vapor-phase synthesis of uniform silica spheres through two-stage hydrolysis of SiCl4 [J]. Mater Res Bull, 2008, 43(11): 2833–2839.
[9] FUCHIGAMI K, TAGUCHI Y, TANAKA M. Synthesis of spherical silica particles by sol-gel method and application [J]. Polym Advan Technol, 2008, 19(8): 977–983.
[10] MILY E, GONA LEZ A, IRUIN J J, et al. Silica nanoparticles obtained by microwave assisted sol-gel process multivariate analysis of the size and conversion dependence [J]. J Sol-Gel Sci Technol, 2010, 53(3): 667–672.
[11] JESIONOWSKI T. Preparation of spherical silica in emulsion systems using the co-precipitation technique [J]. Mater Chemi Phys, 2009, 113(2): 839–849.
[12] 刘跃军, 刘亦武, 魏珊珊, 等. 复合剪切力场下纳米 SiO2的制备及原位改性[J]. 硅酸盐学报, 2010, 38(6): 1064–1069.
LIU Yuejun, LIU Yiwu, WEI Shanshan, et al. J Chin Ceram Soc, 2010, 38(6): 1064–1069.
[13] 王夏, 韦万, 梁振华, 等. 均相沉淀–燃烧法合成单分散球形 SiO2/CaMoO4: Eu3+, Li+红色荧光粉的发光性能[J]. 硅酸盐学报, 2013, 41(5): 701–704.
WANG Xia, WEI Wan, LIANG Zhenhua, et al. J Chin Ceram Soc, 2013, 41(5): 701–704.
[14] 韩静香, 佘利娟, 翟立新, 等. 化学沉淀法制备纳米二氧化硅[J]. 硅酸盐通报, 2010, 29(3): 681–683.
HAN Jingxiang, SHE Lijuan, ZHAI Lixin, et al. Bull Chin Ceram Soc (in Chinese), 2010, 29(3): 681–683.
[15] 沈淑玲, 毋伟, 郭锴, 等. 反相微乳液法制备不同形貌超细二氧化硅[J]. 北京化工大学学报(自然科学版), 2007, 34(5): 504–507.
SHEN Shuling, WU Wei, GUO Kai, et al. J Beijing Univ Chem Tech (Nat Sci) (in Chinese), 2007, 34(5): 504–507.
[16] 熊洁羽, 翟峥, 朴香兰, 等. K2SO4 辅助混合模板剂制备大孔–中孔 SiO2 微球[J]. 硅酸盐学报, 2010, 38(11): 2009–2104.
XIONG Jieyu, ZHAI Zheng, PU Xianglan, et al. J Chin Ceram Soc, 2010, 38(11): 2009–2104.
[17] KÁROLY Z, SZÉPVÖLGYI J. Plasma spheroidization of ceramic par-ticles [J]. Chem Eng and Process, 2005, 44(2): 221–224.
[18] DIGNARD N M, BOULOS M. Ceramic powder spheroidization under induction plasma conditions [C] //Proceedings of the 13th International Symposium on Plasma Chemistry, Beijing, China, 1997, 3: 1031.
 

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