张礼华,张云升,殷倩文.Li2O/K2O物质的量比对P2O5-Al2O3-BaO-Li2O-K2O磷酸盐玻璃热光性能的影响[J].材料导报,2018,32(12):1955-1958 |
Li2O/K2O物质的量比对P2O5-Al2O3-BaO-Li2O-K2O磷酸盐玻璃热光性能的影响 |
Effect of Different Li2O/K2O Ratio on the Thermo-optical Properties of Phosphate Glass with P2O5-Al2O3-BaO-Li2O-K2O |
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DOI:10.11896/j.issn.1005-023X.2018.12.003 |
中文关键词: 混合碱效应 磷酸盐玻璃 热学性能 热光性能 零热畸变 |
英文关键词: mixed alkali effect, phosphate glass, thermal property, thermo-optical property, zero thermal distortion |
基金项目:张礼华:女,1979年生,博士研究生,副教授,主要从事无机非金属材料研究 E-mail:zhanglihua1250@163.com 张云升:通信作者,男,1973年生,博士,教授,主要从事土木工程材料研究 E-mail:zhangys279@163.com |
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中文摘要: |
通过高温熔融法制备了不同Li2O/K2O物质的量比的磷酸盐玻璃,研究了其热学性能和热光性能。采用干涉仪法测试了玻璃的折射率温度系数dn/dT,并进一步计算获得了热光系数。结果表明:随着Li2O/K2O物质的量比的增大,玻璃的转变温度Tg、软化温度Tf、热膨胀系数α皆出现极值点,呈现明显的混合碱效应;而玻璃的热光系数dS/dT随着Li2O含量增加而增大,当Li2O/K2O物质的量比为9∶6时,玻璃的dS/dT为0.08×10-6/K;在磷酸盐体系中可获得具有零热畸变的光学玻璃。 |
英文摘要: |
Phosphate glasses with various Li2O/K2O ratios were synthesized using the melt quenching technique. The thermo-optical properties of the glasses were studied. The temperature coefficients of refractive index (dn/dT) of the glasses were measured using interferometric technique and the thermo-optical coefficients were calculated. The results showed that with the increasing of Li2O/K2O ratios, mixed alkali effect could be observed on the glass transition temperature (Tg), softening temperature (Tf) and thermal expansion coefficient (α). Meanwhile, the thermo-optical coefficient (dS/dT) increased monotonously with the increase of Li2O content. The optimized value of thermo-optical coefficient with 0.08×10-6/K was obtained with Li2O/K2O ratio at 9∶6. Results show that a phosphate glass with zero thermal distortion can be obtained. |
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