Glass ceramic composite material as well as preparation method and application thereof
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.
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[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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