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Glass ceramic composite material as well as preparation method and application thereof
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A composite material and glass-ceramic technology, used in dental preparations, pharmaceutical formulations, dental prostheses, etc., to achieve good processing performance, natural color, and improved strength.
Pending Publication Date: 2022-04-22
SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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preparation example Construction
[0046] The preparation method of the glass-ceramic composite material provided by the present invention uses hollow oxide and glass-ceramic powder as raw materials to prepare the glass-ceramic composite material through mixing, compression molding and crystallization in sequence. The method is simple and industrially operable Strong.
[0047] In the present invention, there is no specific limitation on the mixing method of hollow oxide and glass ceramic powder, for example, dry mixing, wet mixing, etc. can be used, but the mixing force should be controlled during the mixing process to prevent damage to the hollow structure.
[0048] Optionally, the compression molding pressure is 60-100Mpa, preferably 80Mpa.
[0049] In some preferred embodiments, the compression molding pressure can be, for example, but not limited to 60Mpa, 70Mpa, 80Mpa, 90Mpa or 100Mpa, preferably 80Mpa.
[0050] Optionally, the vacuum degree of the crystallization treatment is 0-50Mpa, preferably 10-30Mpa...
Embodiment 1
[0060] A method for preparing a glass-ceramic composite material, comprising the following steps:
[0061] (1) Mixing the glass-ceramic powder and the hollow oxide in proportion to obtain a mixed powder; dry-pressing the mixed powder at 80 MPa to obtain a block-shaped glass powder green body;
[0062] (2) The green body obtained in step (1) was first heat-treated at 500° C. and a vacuum of 30 MPa for 3 hours, and then at 700° C. and a vacuum of 30 MPa for 3 hours to obtain the final glass-ceramic composite material.
[0063] Among them, the hollow oxide is hollow silicon oxide, and the composition of the raw materials and the hollow ratio of the hollow oxide are shown in Table 1.
Embodiment 2-9
[0065] A preparation method of a glass-ceramic composite material, the preparation method is the same as in Example 1, and the composition of the raw materials and the hollow ratio of the hollow oxide are shown in Table 1.
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Abstract
The invention provides a glass ceramiccomposite material as well as a preparation method and application thereof, and relates to the technical field of glass materials. The glass ceramiccomposite material provided by the invention comprises the hollow oxide and the glass ceramicpowder, and the hollow oxide forms natural pores to form a synergistic effect with crystals in the glass ceramic, so that crack propagation is prevented, and the strength is improved; meanwhile, the refractive index of the hollow oxide is adjusted by the hollow rate of the hollow oxide powder and is similar to the refractive index of microcrystalline glass, so that the permeability is not influenced while the strength is improved. The strength of the microcrystalline glass composite material provided by the invention is improved to 500 Mpa or above, and the microcrystalline glass composite material is good in permeability, has good processability and can be used for preparing false teeth.
Description
technical field [0001] The invention relates to the technical field of glass materials, in particular to a glass-ceramic composite material and its preparation method and application. Background technique [0002] With the development of economy and society and the improvement of people's living standards, oral health has been widely valued by the whole society. However, bad eating habits and the development of the aging population have made oral health problems increasingly prominent, especially the defect or loss of teeth that make it impossible to perform normal chewing and other functions, which brings a lot of inconvenience to patients. As a restoration of missing or missing teeth, dentures are of great significance for ensuring normal tooth function and have a huge market demand. [0003] The performance of dentures is mainly determined by the materials used to make them. The glass-ceramic composite material composed of zirconia and lithiumsilicate has excellent per...
Claims
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