复合改性剂对CO_2硬化水玻璃砂性能的影响
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摘要
用无机物粉末(Al_2O_3、ZrO_2和Si_3N_4)和有机酯(十六烷酸甲酯、硬脂酸甲酯和邻苯二甲酸二辛酯)对水玻璃进行改性,测定改性后CO_2水玻璃砂试样的即时强度、24 h强度和残留强度,通过XRD和SEM分析了改性剂对水玻璃砂性能的影响机理。结果表明,无机物改性剂的最佳加入量为1.5%,有机物改性剂的优化配比为十六烷酸甲酯6%、硬脂酸甲酯2%、邻苯二甲酸二辛酯4%。无机物粉末和有机酯的加入都在一定程度上提高了水玻璃砂的常温强度并改善了其溃散性。
Sodium silicate was modified by inorganic powder(Al_2O_3, ZrO_2 and Si_3N_4) and organic ester(methyl palmitate, methyl stearate and dioctyl phthalate), the instant strength, 24 h strength and residual strength of the modified CO_2 sodium silicate sand samples were measured, the influence mechanism of modifier on the properties of sodium silicate sand was analyzed by XRD and SEM. The results showed that the best addition amount of inorganic modifier is 1.5%, the optimum ratio of organic modifiers is methyl palmitate 6%, methyl stearate 2%, dioctyl phthalate 4%. The addition of inorganic powder and organic ester increases the strength of sodium silicate sand to a certain extent and improves its collapsibility.
Sodium silicate was modified by inorganic powder(Al_2O_3, ZrO_2 and Si_3N_4) and organic ester(methyl palmitate, methyl stearate and dioctyl phthalate), the instant strength, 24 h strength and residual strength of the modified CO_2 sodium silicate sand samples were measured, the influence mechanism of modifier on the properties of sodium silicate sand was analyzed by XRD and SEM. The results showed that the best addition amount of inorganic modifier is 1.5%, the optimum ratio of organic modifiers is methyl palmitate 6%, methyl stearate 2%, dioctyl phthalate 4%. The addition of inorganic powder and organic ester increases the strength of sodium silicate sand to a certain extent and improves its collapsibility.
引文
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[11]Sandhu A K,Singh S,Pandey O P. Neutron irradiation effects on optical and structural properties of silicate glasses[J]. Materials Chemistry&Physics,2009,115(2):783-788.
[2]樊自田.水玻璃砂工艺原理及应用技术[M].北京:机械工业出版社,2004(4):51-51.
[3]朱纯熙,卢晨.水玻璃砂基础研究的最新进展[J].中国机械工程,1999,(2):220-223.
[4]董选普,何大炎,陆浔.新型易溃散改性水玻璃砂的研究[J].铸造,2003,52(1):38-41.
[5]韩文静,赵治平,宋会宗.水玻璃砂残留强度的形成及改善途径[J].铸造,2001,50(12):740-742.
[6]樊自田,王继娜,汪华方.水玻璃粘结剂改性技术的现状及发展趋势[J].现代铸铁,2007(4):76-79.
[7]张黎,董选普,王继娜.纳米氧化物改性水玻璃的作用机理研究[J].铸造,2006,55(11):1192-1194.
[8]魏金宇,张希俊,谈剑.脉冲电流对水玻璃改性的影响[J].铸造,2005,64(1):50-54.
[9]Wang J,Fan Z,Zan X,et al. Properties of sodium silicate bonded sand hardened by microwave heating[J]. China Foundry,2009,6(3):191-196.
[10]Kim E H,Cho G H,Oh Y S,et al. Development of a high-temperature mold process for sand casting with a thin wall and complex shape[J]. Thin Solid Films,2016,620:70-75.
[11]Sandhu A K,Singh S,Pandey O P. Neutron irradiation effects on optical and structural properties of silicate glasses[J]. Materials Chemistry&Physics,2009,115(2):783-788.