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首页> 外文期刊>ACS Sustainable Chemistry & Engineering >Structural, Dielectric, and Thermal Properties of Pb Free Molybdate Based Ultralow Temperature Glass
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Structural, Dielectric, and Thermal Properties of Pb Free Molybdate Based Ultralow Temperature Glass

机译:无铅钼酸盐基超低温玻璃的结构,介电和热性能

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摘要

A new glass with ultralow glass transition temperature based on 10Li2O-10Na2O-20K2O-60MoO3 (LNKM) has been developed by conventional glass melting and quenching process. The glass has ultralow glass transition and melting temperatures being 198 and 350 °C respectively. The glass exhibits a coefficient of thermal expansion of 17 ppm/°C in the temperature range of 25-300 °C. Xray diffraction and Raman spectroscopic studies indicate that the glass is partially crystallized. The chemical and elemental composition of the glass is confirmed by X-ray photoelectron spectroscopy. The glass pellet heat treated at 300 °C has a relative permittivity of 5.07 and dielectric loss tangent of 0.006 at 1 MHz. At 9.97 GHz, it shows a relative permittivity of 4.85 and dielectric loss tangent of 0.0009. The temperature dependence of the relative permittivity at 1 MHz and 9.97 GHz of the glass is 307 ppm/°C (temperature range 20- 100 °C) and 291 ppm/°C (temperature range 25-85 °C), respectively.
机译:通过传统的玻璃熔化和淬火工艺,开发了一种基于10Li2O-10Na2O-20K2O-60MoO3(LNKM)的超低玻璃化转变温度的玻璃。该玻璃具有极低的玻璃化转变温度,熔融温度分别为198和350°C。在25-300°C的温度范围内,玻璃的热膨胀系数为17 ppm /°C。 X射线衍射和拉曼光谱研究表明玻璃是部分结晶的。玻璃的化学和元素组成通过X射线光电子能谱确认。在300 MHz下进行热处理的玻璃颗粒在1 MHz下的相对介电常数为5.07,介电损耗角正切为0.006。在9.97 GHz处,它的相对介电常数为4.85,介电损耗角正切为0.0009。玻璃在1 MHz和9.97 GHz时的相对介电常数对温度的依赖性分别为307 ppm /°C(温度范围20-100°C)和291 ppm /°C(温度范围25-85°C)。

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