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1995年底,ISO/TC48及其SC1-5在德国法兰克福福美茵茨召开第十届年会,提出了3.3-硼硅玻璃和中性玻璃的主要化学成分、化学稳定性和物理性能技术指标。其中,3.3-硼硅玻璃和我国的特硬料、GG17料化学成分和理化性能基本一致,主要差别在于线热膨胀系数控制范围不一致,我国的两种玻璃未严格规定线热膨胀系数控制范围。而国际中性玻璃和中国“中性”玻璃的差别明显,积极发展国际中性玻璃生产,逐步限用我国的“中性”玻璃正成为业内人士的共识。
The end of 1995, ISO / TC48 and its SC1-5 in Frankfurt, Germany, the tenth annual meeting held in Frankfurt, Germany 3.3-borosilicate glass and neutral glass of the main chemical composition, chemical stability and physical properties of technical indicators. Among them, 3.3-borosilicate glass and China’s special hard materials, GG17 chemical composition and physical and chemical properties of the basic line, the main difference is that the linear control coefficient of thermal expansion range is inconsistent, our two glass does not strictly regulate the linear thermal expansion coefficient control. However, the difference between the international neutral glass and China’s “neutral” glass is obvious. Actively developing the international neutral glass production and gradually limiting our use of “neutral” glass are becoming the consensus of the industry.