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本文用热学分析、高温和室温X射线衍射分析、红外吸收光谱等方法研究了NaBO_2-B_2O_3体系玻璃的形成、热稳定性和晶化机制。这一体系十分容易形成稳定的非晶玻璃,晶化过程与非晶的宏观状态有关。块状玻璃的晶化温度比非晶粉末高。部分成份晶化后形成不同的物相,熔点也不同。晶化产物的晶体结构类似于玻璃的结构。 NaBO_2-B_2O_3体系的电导率用交流阻抗直接测量法测定。玻璃态的电导率比晶态试样高2至3个数量级,其导电激活能低于同一成份的晶态试样。
In this paper, the formation, thermal stability and crystallization mechanism of NaBO_2-B_2O_3 system glass have been studied by means of thermal analysis, high temperature and room temperature X-ray diffraction analysis and infrared absorption spectroscopy. This system is very easy to form a stable amorphous glass, the crystallization process and the amorphous state of macro-related. The bulk glass has a higher crystallization temperature than the amorphous powder. Part of the crystallization of the formation of different phases, the melting point is also different. The crystal structure of the crystallized product is similar to that of glass. The conductivity of NaBO_2-B_2O_3 system was measured by direct measurement of AC impedance. The conductivity of the glassy state is 2 to 3 orders of magnitude higher than that of the crystalline sample, and the conductivity of the glassy state is lower than that of the crystalline sample of the same component.