Structural, Dielectric, and Thermal Properties of Pb Free Molybdate Based Ultralow Temperature Glass
Structural, Dielectric, and Thermal Properties of Pb Free Molybdate Based Ultralow Temperature Glass
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DOI：
10.1021/acssuschemeng.6b00721
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发表时间：
2016-06
影响因子：
8.4
通讯作者：
J. Varghese;Tuomo Siponkoski;M. Teirikangas;M. Sebastian;A. Uusimäki;H. Jantunen
中科院分区：
文献类型：
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作者：
J. Varghese;Tuomo Siponkoski;M. Teirikangas;M. Sebastian;A. Uusimäki;H. Jantunen
以10Li_2O-10Na_2O-20K_2O-60MoO_3(LNKM)为基料，采用常规的玻璃熔炼和冷却工艺，研制出一种新型的超低玻璃化转变温度玻璃。该玻璃具有超低的玻璃化转变温度和熔融温度，分别为198℃和350℃。该玻璃在25-300℃温度范围内的热膨胀系数为17ppm/°C。X射线衍射和拉曼光谱研究表明，该玻璃是部分晶化的。用X射线光电子能谱确定了玻璃的化学成分和元素组成。经30 0℃热处理的玻璃微球在1 MHz下的相对介电常数为5.0 7，介电损耗正切为0.006。在9.97GHz下，其相对介电常数为4.85，介电损耗正切为0.0009。玻璃在1 MHz和9.97 GHz的相对介电常数与温度的关系分别为307ppm/°C(温度范围20-100℃)和291ppm/°C(温度范围25-85℃)。
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. X-ray 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.