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Magnesium/hydroxyapatite composite material and preparation method thereof

A technology for hydroxyapatite and composite materials, which is applied in the field of preparing magnesium/hydroxyapatite composite materials by microwave sintering, can solve the problems of slow heating rate, large energy consumption and high equipment requirements, and achieves fast heating rate, The effect of low energy consumption and short sintering time

Inactive Publication Date: 2010-08-04
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Witte et al prepared the magnesium alloy AZ91D / hydroxyapatite composite material by hot extrusion, but this method requires high equipment, so the cost is high; Wang Haibo et al from Panzhihua University, Liu Debao from Tianjin University of Technology, etc The magnesium / hydroxyapatite composite material was sintered by powder metallurgy, using the traditional heating method, which relies on the heating element to transfer heat energy to the heated object through convection, conduction or thermal radiation to make it When a certain temperature is reached, the heat is transferred from the outside to the inside, the heating rate is slow, the sintering time is long, the energy consumption is large, and it is not environmentally friendly.

Method used

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  • Magnesium/hydroxyapatite composite material and preparation method thereof
  • Magnesium/hydroxyapatite composite material and preparation method thereof
  • Magnesium/hydroxyapatite composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) The method of magnetic stirring is used to mix powder, the total mass of powder is 20g, the mass percentage of magnesium powder (purity 99.8%, particle size ≤ 80 μm), hydroxyapatite powder (purity 97.5%, particle size ≤ 80 μm) was 19.5%, the stirring speed was 1200 rpm, and magnetic stirring was performed for 4 hours.

[0019] (2) Dry the mixed powder in step (1) in a vacuum oven for 2 hours at a drying temperature of 60 degrees Celsius.

[0020] (3) The mixed powder in step (2) is cold-pressed into a mold, the size of the compressed sample is Φ11×12 mm, the size of the bent sample is 30×5×4 mm, and the pressure is 500 MPa.

[0021] (4) A ceramic tube is placed in the glass tube, silicon carbide is used as an auxiliary heating substance, and 5 grams of silicon carbide is placed between the ceramic tube and the glass tube. The sample is placed in a ceramic tube with an electrical insulating sheet at the bottom.

[0022] (5) Sinter the green body in step (3) in a va...

Embodiment 2

[0025] (1) The method of magnetic stirring is used to mix powder, the total mass of powder is 20g, the mass percentage of magnesium powder (purity 99.8%, particle size ≤ 80 μm), hydroxyapatite powder (purity 97.5%, particle size ≤ 80 μm) 5%, the stirring speed was 1200 rpm, and magnetic stirring was performed for 2 hours.

[0026] (2) Dry the mixed powder in step (1) in a vacuum oven for 2 hours at a drying temperature of 100 degrees Celsius.

[0027] (3) The mixed powder in step (2) is cold-pressed into a mold, the size of the compressed sample is Φ11×12 mm, the size of the bent sample is 30×5×4 mm, and the pressure is 450 MPa.

[0028] (4) A ceramic tube is placed in the glass tube, silicon carbide is used as an auxiliary heating substance, and 7 grams of silicon carbide is placed between the ceramic tube and the glass tube. The sample is placed in a ceramic tube with an electrical insulating sheet at the bottom.

[0029] (5) Sinter the green body in step (3) in a vacuum m...

Embodiment 3

[0032] (1) The method of magnetic stirring is used to mix powder, the total mass of powder is 20g, the mass percentage of magnesium powder (purity 99.8%, particle size ≤ 80 μm), hydroxyapatite powder (purity 97.5%, particle size ≤ 80 μm) 10%, the stirring speed was 1200 rpm, and magnetic stirring was performed for 2 hours.

[0033] (2) Dry the mixed powder in step (1) in a vacuum oven for 2 hours at a drying temperature of 100 degrees Celsius.

[0034] (3) The mixed powder in step (2) is cold-pressed into a mold, the size of the compressed sample is Φ11×12 mm, the size of the bent sample is 30×5×4 mm, and the pressure is 600 MPa.

[0035] (4) A ceramic tube is placed in the glass tube, silicon carbide is used as an auxiliary heating substance, and 7 grams of silicon carbide is placed between the ceramic tube and the glass tube. The sample is placed in a ceramic tube with an electrical insulating sheet at the bottom.

[0036] (5) Sinter the green body in step (3) in a vacuum ...

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Abstract

The invention relates to a magnesium / hydroxyapatite composite material and a preparation method thereof. The magnesium / hydroxyapatite composite material is prepared by mixing magnesium and hydroxyapatite serving as raw materials in a mass ratio of 80.5-99.9 percent: 0.1-19.5 percent for molding and sintering the mixture in a vacuum microwave sintering furnace. The composite material provided by the invention has proper mechanical property and can meet the requirements on human body bone tissue materials. A microwave sintering method is adopted, so the method has the advantages of high temperature rise speed, short sintering time, short preparation period, low energy consumption and no pollution.

Description

technical field [0001] The invention relates to a magnesium / hydroxyapatite composite material and a preparation method thereof, in particular to a preparation method for preparing a magnesium / hydroxyapatite composite material by a microwave sintering method. Background technique [0002] With the gradual improvement of people's health requirements, biomedical bone tissue substitute materials are playing an increasingly important role in the field of human medicine. However, the currently commonly used bone tissue replacement materials cannot meet the needs of human beings. The elastic modulus of metal biomaterials such as titanium alloy and stainless steel is much higher than that of human bone, which is easy to cause stress shielding effect; the fracture toughness of ceramic biomaterials is extremely low; and The strength of polymer biomaterials is very low. As a new type of biomedical material, magnesium / hydroxyapatite composite material has a much higher fracture strengt...

Claims

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Application Information

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IPC IPC(8): A61L27/12A61L27/04
Inventor 万怡灶吕孝永何芳黄远
Owner TIANJIN UNIV
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