Effects of Different Refining Agents on Clarification Effect of Neutral Pharmaceutical Glass

Abstract

Abstract: Due to its excellent chemical stability and thermal stability, neutral pharmaceutical glass is widely used in pharmaceutical, food and other packaging fields. In this paper, the effects of oxide refining agent CeO₂, halide refining agent NaCl, and compound refining agent NaCl-CeO₂ and NaCl-CeO₂-NaNO₃ on the clarification effect of neutral pharmaceutical glass were studied. The changes of area fraction, number of bubbles, and mean bubble size were quantitatively analyzed, and the refining agent suitable for neutral medical glass was explored. The research results show that after adding NaCl-CeO₂-NaNO₃ to the neutral pharmaceutical glass liquid, the area fraction and number of bubbles are smaller, and the mean bubble size is larger. Thus, the clarification effect of adding NaCl-CeO₂-NaNO₃ is better than adding NaCl and CeO₂. When 0.4% (mass fraction) NaCl-0.20% (mass fraction) CeO₂-0.005 0% (mass fraction) NaNO₃ is added, within 3 h after the temperature raising to 1 550 ℃, the area fraction of neutral pharmaceutical glass is reduced to 0.6%, the number of bubbles is reduced to 3, and the mean bubble size is 0.60 mm, the clarification effect is better.

Key words: neutral pharmaceutical glass, refining agent, area fraction, number of bubbles, mean bubble size

CLC Number:

TQ171

ZHANG Xiaoyu, LI Changqing, ZHAO Fengyang, SHI Lifen, ZHONG Zhaojin, GAO Qiang. Effects of Different Refining Agents on Clarification Effect of Neutral Pharmaceutical Glass[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(11): 3952-3959.

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