Li2O对中性硼硅玻璃黏度性能的影响

2021-03-22 02:13:20翟建新
河南科技 2021年26期

翟建新

摘 要:将锂辉石加入中性硼硅玻璃配方中,用锂辉石中的LiO等量替代原配方化学组成中的BO、NaO,研究LiO等量替代BO、NaO后LiO加入量對中性硼硅玻璃黏度性能的影响。试验结果表明,随着LiO替代BO、NaO质量分数的增加,中性硼硅玻璃低温黏度点均有不同程度的下降。对于相同含量的LiO、BO、NaO,LiO降低中性硼硅玻璃低温黏度点的能力比BO、NaO强。因此,加入LiO可以降低中性硼硅玻璃低温热处理温度。对于相同含量的LiO、BO、NaO,LiO降低中性硼硅玻璃高温黏度点的能力远比BO、NaO强。因此,引进LiO可以显著降低玻璃加工对应的温度。Li2O可以显著降低中性硼硅玻璃低温、高温黏度点,因此,可以降低低温热处理及高温玻璃加工对应的温度,达到降低生产成本和节能减排的目的。

关键词:中性硼硅玻璃;黏度;节能降耗

中图分类号:TQ171.4 文献标识码:A 文章编号:1003-5168(2021)26-0127-03

Influence of LiO on the Viscosity Properties of Neutral Borosilicate Glass

ZHAI Jianxin

(Jiyuan Yaohui Glass Products Co., Ltd.,  Jiyuan Henan 459000)

Abstract: By adding spodumene to the neutral borosilicate glass formula, replacing the BO and NaO in the chemical composition of the original formula with the same amount of LiO in the spodumene, the effect of LiO addition amount on the viscosity performance of neutral borosilicate glass after replacing BO and NaO by the equivalent amount of LiO is studied. The test results show that with the increase in the mass fraction of LiO instead of BO and Na2O, the low temperature viscosity of neutral borosilicate glass decreases to varying degrees. For the same content of LiO, BO and NaO, LiO has a stronger ability to reduce the low-temperature viscosity point of neutral borosilicate glass than BO and NaO. Therefore, the introduction of LiO can reduce the low temperature heat treatment temperature of neutral borosilicate glass. For the same content of LiO, BO and NaO, LiO is far stronger than BO and NaO in reducing the high temperature viscosity point of neutral borosilicate glass. Therefore, the introduction of LiO can significantly reduce the temperature corresponding to glass processing. LiO can significantly reduce the low temperature and high temperature viscosity points of neutral borosilicate glass, so it can reduce the temperature corresponding to low temperature heat treatment and high temperature glass processing, and achieve the purpose of reducing production costs and energy saving and emission reduction.

Keywords: neutral borosilicate glass;viscosity;saving energy and reducing consumption

中性硼硅玻璃具有耐酸碱性好、抗热震稳定性好、化学稳定性好及机械强度高等优点,被广泛应用于药品包装[1]。其与药液接触不会发生化学反应从而导致药品失效,能有效保护药品的化学性能[2]。2017年工业和信息化部等6部发布的《医药包装工业“十三五”发展建议》提出,未来将重点加快完成注射剂包装由低硼硅玻璃瓶向中性玻璃瓶的转换,因此中性硼硅玻璃有较大的市场前景。

在玻璃生产中,一般采用碱性氧化物助熔。在碱性氧化物中,LiO的锂离子半径小、场强和极化能力高、助熔效果好,可以有效降低玻璃的黏度[3]。同时,Li-O键强较大,可以提高玻璃的化学稳定性[4]。……

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