ZrO2 toughened bioactive glass-ceramics of MgO-CaO-SiO2-P2O5-CaF2 system and preparation method thereof

A glass-ceramic and biologically active technology, applied in medical science, prostheses, coatings, etc., can solve problems such as poor mechanical properties, low content of alkali metal oxides, material strength, and unsatisfactory mechanical processing performance of biological activity , to achieve the effect of improved bending strength and good biological activity

Inactive Publication Date: 2009-10-21
SHANDONG UNIV
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AI Technical Summary

Problems solved by technology

For most machinable glass-ceramics, the cleavage and secondary cleavage between mica crystal layers are the main sources of machinability. During processing, when the sawtooth touches the mica sheet, the cracks will not expand arbitrarily like ordinary glass and ceramics, and the processing direction can be controlled to achieve processing accuracy. The strength, biological activity and machinability are not ideal
Ceravital bio-glass-ceramic contains a series of glasses and glass-ceramics with different components. It is a silicate glass or glass-ceramic with low content of alkali metal oxides, which can form a tight bond with bone. During the infusion process, the crystal phase gradually dissolves, and when the particle size is about 1 μm, it is absorbed by macrophages, etc., but this kind of glass-ceramic has poor mechanical properties and cannot be used in load-bearing parts

Method used

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  • ZrO2 toughened bioactive glass-ceramics of MgO-CaO-SiO2-P2O5-CaF2 system and preparation method thereof
  • ZrO2 toughened bioactive glass-ceramics of MgO-CaO-SiO2-P2O5-CaF2 system and preparation method thereof
  • ZrO2 toughened bioactive glass-ceramics of MgO-CaO-SiO2-P2O5-CaF2 system and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] ZrO 2 Toughened MgO-CaO-SiO 2 -P 2 o 5 -CaF 2 Preparation of bioactive glass-ceramics (5GC2444):

[0041] The mass fraction of each component of the glass is: SiO 2 30.8%, MgO 4.1%, CaO 40.4%, P 2 o 5 14.7%, CaF 2 5%, ZrO 2 5%.

[0042] 1) will contain SiO 2 , MgO, CaO, P 2 o 5 , CaF 2 The pure raw materials for chemical analysis were mixed and put into an alumina ball mill tank, and alumina balls were added, and dry-mixed on a star ball mill at a speed of 250r / min for 5h.

[0043] 2) Put the dry-blended powder obtained in step 1) into a high-purity alumina crucible, and melt it in a high-temperature heating furnace. The raw material is heated up with the furnace at a heating rate of 5°C / min, and then kept at 1450°C 2h to form a uniform glass melt, quickly pour the high temperature glass melt into cold water for quenching treatment;

[0044] 3) Dry the quenched glass and add 1:1 mass of absolute ethanol, then put it into an alumina ball mill jar, add ...

Embodiment 2

[0048] ZrO 2 Toughened MgO-CaO-SiO 2 -P 2 o 5 -CaF 2 Preparation of bioactive glass-ceramics (8GC2442):

[0049] The mass fraction of each component of the glass is: SiO 2 29.8%, MgO 4%, CaO 39%, P 2 o 5 14.2%, CaF 2 5%, ZrO 2 8%.

[0050] 1) will contain SiO 2 , MgO, CaO, P 2 o 5 , CaF 2 Mix the pure raw materials for chemical analysis, put them into an alumina ball mill tank, add alumina balls, and dry mix them on a star ball mill at a speed of 250r / min for 5 hours.

[0051] 2) Put the dry-blended powder obtained in step 1) into a high-purity alumina crucible, and melt it in a high-temperature heating furnace. The raw material is heated up with the furnace at a heating rate of 5°C / min, and then kept at 1450°C 2h to form a uniform glass melt, quickly pour the high temperature glass melt into cold water for quenching treatment;

[0052] 3) Dry the quenched glass and add 1:1 mass of absolute ethanol, then put it into an alumina ball mill jar, add alumina ball...

Embodiment 3

[0056] MgO-CaO-SiO 2 -P 2 o 5 -CaF 2 Preparation of bioactive glass-ceramics (0GC2444):

[0057] The mass fraction of each component of the glass is: SiO 2 32.5%, MgO 4.4%, CaO 42.6%, P 2 o 5 15.5%, CaF 2 5%.

[0058] 1) will contain SiO 2 , MgO, CaO, P 2 o 5 , CaF 2 Mix the pure raw materials for chemical analysis, put them into an alumina ball mill tank, add alumina balls, and dry mix them on a star ball mill at a speed of 250r / min for 5 hours.

[0059] 2) Put the dry-blended powder obtained in step 1) into a high-purity alumina crucible, and melt it in a high-temperature heating furnace. The raw material is heated up with the furnace at a heating rate of 5°C / min, and then kept at 1450°C 2h to form a uniform glass melt, quickly pour the high temperature glass melt into cold water for quenching treatment;

[0060] 3) Dry the quenched glass and add 1:1 mass of absolute ethanol, then put it into an alumina ball mill jar, add alumina balls, and wet mix it on a st...

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Abstract

The invention discloses a ZrO2 toughened bioactive glass-ceramics of MgO-CaO-SiO2-P2O5-CaF2 system. The glass comprises the components with mass fractions as follows: 25.7-34.1% of SiO2, 3.4-4.6% of MgO, 33.7-44.8% of CaO, 12.2-16.3% of P2O5, 0.1-5% of CaF2 and 0.1-20% of ZrO2; wherein, the ZrO2 is tetragonal zirconia. The prepared ZrO2 toughened bioactive glass-ceramics of MgO-CaO-SiO2-P2O5-CaF2 system witnesses obviously improved bending strength and fracture toughness; the elastic module index of the bioactive glass-ceramics can serve as materials for restoring or replacing artificial bones and the linear expansibility index thereof meets the requirement of similarity to the linear expansibility of titanium and titanium alloy coating materials. The bioactive glass-ceramics show good bioactivity in the immersion test in the simulated body fluid.

Description

technical field [0001] The present invention relates to a new type of bone repair substitute material, in particular to the use of ZrO 2 Toughened MgO-CaO-SiO 2 -P 2 o 5 -CaF 2 The invention relates to bioactive glass-ceramics and a preparation method thereof, belonging to the technical field of inorganic non-metallic materials. Background technique [0002] Medical bioactive ceramic materials have good bioactivity and biocompatibility, and can form a good combination with human bone tissue after being implanted in the human body. However, the fatigue strength and fracture toughness are low, so it is difficult to use in bearing parts. In recent years, scholars at home and abroad have crystallized some biological glass materials and developed a series of bioactive glass-ceramics with excellent biological activity and mechanical properties. The development and utilization of bioactive glass-ceramics has injected new vitality into the development of bone repair alternativ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/10A61L27/54A61L27/32A61L27/06
Inventor 陈传忠孟祥国王佃刚
Owner SHANDONG UNIV
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