Li 4 SiO 4 was obtained by using quartz powder of different particle sizes (75−180 μm, 45−75 μm, 38−45 μm, and <38 μm) and Li 2 CO 3 as raw materials through a solid-state reaction at 720 °C. X-ray diffraction (XRD), scanning electron microscopy (SEM), and differential thermal analysis and thermogravimetry (DTA/TG) were used to examine the sintering behavior and properties of the samples. The results indicated that when the particle size of the quartz powder decreased, the solid-state reaction performed more completely, the content of the Li 4 SiO 4 phase increased, and the size of the grain agglomerates decreased gradually. The enhanced chemical reactivity of the quartz powder with Li 2 CO 3 and the shortened diffusion distance as the quartz size decreases are helpful to the formation of the Li 4 SiO 4 phase. The sorption analysis revealed that the samples synthesized using the quartz powder with smaller particle sizes experienced a more rapid absorption−desorption process with a higher absorption efficiency.
The rapid development of the economy has made the demand for talents in social positions more stringent. Under the current practical conditions of employment difficulties for fresh graduates every year in our country, many colleges and universities have introduced innovation and entrepreneurship education into the classroom in order to help students establish In the process of correct entrepreneurial goals, it can achieve better development through its own efforts. Therefore, this article mainly analyzes the goals, principles and implementation methods of innovation and entrepreneurship education in colleges and universities. It is hoped that students can exercise their entrepreneurial spirit and guide them to accumulate entrepreneurial experience while achieving comprehensive development.
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