Alumina-based biologic active ceramic composite material

A technology of active ceramics and composite materials, applied in the field of bioceramic materials, can solve problems such as difficult to meet clinical needs, fracture toughness is not explained, and achieve the effect of improving mechanical properties, increasing biological activity, and reducing production investment

Inactive Publication Date: 2008-08-27
张木蕃
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent No. 200410079278.9 reports "a machinable bioactive glass-ceramic and its preparation method". Although it has good bioactivity, its flexural strength is only 134MPa, and its fracture toughness does not indicate that it is difficult to meet clinical needs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: alumina and diopside are prepared as raw materials according to the mass percentage of alumina 99% and diopside 1%. Alumina balls are used for mixing and ball milling, and the powder after ball milling passes through a 100-mesh sieve to obtain a mixed powder. Put the mixed powder into a graphite mold for compression molding, hot press sintering under an argon atmosphere, the sintering temperature is 1450°C, the sintering pressure is 30MPa, the sintering time is 1 hour, and the heat preservation is 30 minutes. The obtained alumina-based bioceramic composite has a Vickers hardness of HV18.86GPa, a flexural strength of 457MPa, and a fracture toughness of 4.56MPa m 1 / 2 . Cut the sintered sample into 3.3mm x 4.3mm x 36mm splines with an internal microtome. After rough grinding, fine grinding and polishing, they are cleaned ultrasonically. Then, put them into the prepared simulated body fluid respectively. The samples were soaked in a constant temperature box...

Embodiment 2

[0015] Embodiment two: other is the same as embodiment one, and difference is that alumina, diopside prepare raw material by the mass percentage of alumina 80%, diopside 20%. The sintering temperature is 1400°C, the sintering pressure is 25MPa, and the heat preservation is 30 minutes. The Vickers hardness HV of the prepared alumina-based ceramic composite is 15.08GPa, the bending strength is 260.5MPa, and the fracture toughness is 3.50MPa m 1 / 2 . After testing, a large number of hydroxycarbonate hydroxyapatite deposits are formed on the surface of the sample soaked in simulated body fluid, and the composite material has good biological activity.

Embodiment 3

[0016] Embodiment three: other is the same as embodiment one, difference is that alumina, diopside prepare raw material by the mass percentage of alumina 98%, diopside 2%. Ball milled in a ball mill for 40 hours. The hot pressing process is as follows: pressurize 28Mpa at a temperature of 1500°C, hot press and sinter under nitrogen protection conditions, and keep warm for 35 minutes. The Vickers hardness HV of the prepared alumina-based bioceramic composite is 17.40GPa, the flexural strength is 446MPa, and the fracture toughness is 4.66MPa m 1 / 2 . The samples immersed in the simulated body fluid were analyzed by SEM, and the deposits formed on the surface were bone-like apatite-hydroxycarbonated apatite.

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Abstract

The invention relates to an aluminum dioxide substrate biological active ceramic composite material with better mechanical properties and biological activity, belonging to the technical field of bioceramic material, which contains 80-99% of aluminum dioxide and 1-20% of diopside, referring to mass percentage. The preparation method comprises using aluminum dioxide balls to ball grind mixed raw materials, screening the powder material via a screen of 100 meshes to prepare mixed powder, arranging the mixed powder into a graphite mould to be died and shaped, thermally pressing and sintering in nitrogen gas or argon gas, while the sintering temperature is 1400-1500DEG C, sintering pressure is 25-30MPa, keeping the temperature and pressure for 30-40min. Tests prove that the sample immersed in simulated body fluid has much carbonate hydroxyapatite sediment generated at surface and the composite material has better biological activity. The composite material has simple preparation, low material cost, low production investment and wide application for the preparation of artificial bone.

Description

Technical field: [0001] The invention belongs to the field of bioceramic materials, in particular to an alumina-based bioactive ceramic composite material with high mechanical properties and good bioactivity. Background technique: [0002] Alumina ceramic materials have the advantages of high hardness, wear resistance, heat resistance and chemical stability, and are one of the most widely studied ceramic materials at present. However, alumina is an inert ceramic material. As a repair material such as artificial joints, pure alumina cannot form osseointegration with body tissues due to its lack of biological activity. After a period of implantation, it is prone to loosening and sinking, resulting in failure. are greatly restricted. Artificial bone requires not only high hardness, flexural strength, wear resistance and toughness, but also high fatigue resistance and biological activity. The Chinese patent No. 200410079278.9 reports "a machinable bioactive glass-ceramic and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622
Inventor 张木蕃潘圣辉徐玉涵
Owner 张木蕃
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