One main crystal phase is li 2 sio 3 Fluoride-doped oxygen-nitrogen glass-ceramics and preparation method thereof

Abstract

The invention relates to fluoride-doped oxynitride microcrystalline glass with a Li2SiO3 main crystal phase and a preparation method thereof. The glass is prepared from the following elements such asSi, O, Li, F, N and M, wherein a molar ratio of Si to O to Li to F to N to M is (65.5 to 71) to (149 to 159) to (66 to 70) to (5 to 8) to (10 to 12) to (2.5 to 4). The preparation method of the fluoride-doped oxynitride microcrystalline glass comprises the following steps: uniformly mixing the raw materials and performing heat preservation treatment on the raw materials at 1430 to 1450 DEG C; thenperforming annealing at 530 to 550 DEG C, and then cooling to obtain oxynitride glass; subsequently, sequentially nucleating and crystallizing the oxynitride glass under a nitrogen atmosphere; performing crystallization after 8 to 10 hours and then uniformly cooling the oxynitride glass to 150 to 250 DEG C; then cooling along with a furnace. The preparation method disclosed by the invention is simple, a melting temperature, a glass transition temperature and a crystallization peak temperature are relatively low, environment is friendly, the production cost is low, the obtained product is excellent in performance, and large-scale industrialized application is convenient.

Description

technical field [0001] The invention belongs to the field of material science, and the invention relates to glass and glass-ceramic materials and preparation methods thereof, in particular to a main crystal phase of Li 2 SiO 3 Fluoride-doped oxynitride glass-ceramics and a preparation method thereof. Background technique [0002] Since the discovery of glass-ceramic in the 1950s, a large number of scholars have conducted extensive research on the interrelationships among its composition, processing, crystallization kinetics, microstructure, properties, and potential applications. Since the successful development of glass-ceramics, it has been widely used in biomedicine, machinery, electronics, aerospace engineering and other fields. Compared with traditional glass, glass-ceramics has excellent thermal, mechanical, and electrical properties, such as low thermal expansion coefficient, high compressive strength, high flexural strength, high elastic modulus, high fracture toug...

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Problems solved by technology

At the same time, so far, no 2 O-SiO 2 -Si 3 N 4 Related technical reports on the introduction of fluoride into the system glass and partial substitution of bridging oxygen by fluorine atoms

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