High-strength bacteriostatic antibacterial lithium disilicate glass ceramic and preparation method thereof

Abstract

High-strength bacteriostatic antibacterial lithium disilicate glass ceramic and a preparation method thereof belong to the technical field of biological materials. In the prior art, a dental department all-ceramic restorative material obtained by doping Ag<+>, Zn<2+> and Cu<2+> in lithium disilicate glass ceramic does not exist. The high-strength bacteriostatic antibacterial lithium disilicate glass ceramic is characterized by preparing materials for matrix glass according to the weight percentage of the matrix glass, additionally determining the total weight of Ag2O, ZnO and CuO in the high-strength bacteriostatic antibacterial lithium disilicate glass ceramic according to the ratio of 0.1 to 8 percent of the weight of the matrix glass, and preparing the matrix glass by adopting a high temperature melting method, wherein the content of the Ag2O is larger than or equal to 0 percent but less than or equal to 2 percent, ZnO is larger than or equal to 0 percent but less than or equal to 5 percent and CuO is larger than or equal to 0 percent but less than or equal to 1 percent, wherein only the content of AgO2, ZnO and CuO is allowed to be equal to 0 at the same time; coring the prepared matrix glass at the temperature of 450 to 550 DEG C for 1.5 to 2.5 hours; performing three-step crystallization: crystallizing at the temperature of 650 to 680 DEG C for 1 to 3 hours, crystallizing at the temperature of 710 to 740 DEG C for 20 to 60 minutes, crystallizing at the temperature of 800 to 830 DEG C for 10 to 20 minutes, so as to obtain the high-strength bacteriostatic antibacterial lithium disilicate glass ceramic.

Description

technical field [0001] The invention relates to a lithium disilicate glass ceramic with high-strength antibacterial and antibacterial properties and a preparation method thereof, belonging to the technical field of biological materials. Background technique [0002] Lithium disilicate grains have a long rod-like, staggered interlocking microstructure, and the lithium disilicate grains evenly distributed in the glass ceramics can block the crack propagation process of the glass ceramics, making this lithium disilicate glass ceramics more Good toughness. Moreover, the glass ceramic has suitable transparency and beautiful appearance, and is very suitable as a dental all-ceramic restoration material. Existing lithium disilicate glass ceramic Li 2 Si 2 o 5 The crystallinity is above 65%, and there is a small amount of Li 3 PO 4 and Li 2 SiO 3 Grains exist, the average length of the grains is 5.2μm, the diameter is about 0.8μm, and the flexural strength is above 400MPa, se...

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Problems solved by technology

[0005] However, if Ag is doped in lithium disilicate glass ceramics + , Zn 2+ 、Cu 2+ Plasma, in theory, is bound to change the crystallinity, crystal phase and grain size of glass ceramics, thereby reducing the strength of lithium disilicate glass ceramics

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