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Method for preparing medical femoral head prosthesis dense alumina ceramic

A technology of alumina ceramics and femoral head, applied in the field of materials, can solve the problems of uneven distribution, abnormal growth, ineffective control of powder particle size, etc., and achieve the effect of good toughness, reliability and excellent mechanical properties

Inactive Publication Date: 2016-08-10
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These processes have not effectively controlled the particle size of each powder in the raw material, especially the uneven distribution of magnesia powder and zirconia powder in the raw material, which makes the local growth of alumina particles inside the alumina ceramics abnormal, resulting in microscopic particles of alumina ceramics. Inhomogeneous structure seriously reduces the mechanical properties and service life of alumina ceramic femoral head prosthesis

Method used

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  • Method for preparing medical femoral head prosthesis dense alumina ceramic
  • Method for preparing medical femoral head prosthesis dense alumina ceramic
  • Method for preparing medical femoral head prosthesis dense alumina ceramic

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0032] The preparation process of the medical femoral head prosthesis dense alumina ceramics of the present embodiment is as follows figure 1 Shown:

[0033]1. Prepare the alumina powder with a particle size of 0.2-2.0 microns according to the ratio of adding 15-25 alumina balls with a diameter of 8-12 mm per 100 grams of alumina powder, and then pour it into the ball mill tank High-speed ball milling for 3~5 hours; then pour figure 2 In the funnel of the winnowing device shown. figure 2 The winnowing device shown includes a raw material hopper, tuyere and a collector. The tuyere is set under the mouth of the raw material funnel, and a control valve is installed at the mouth of the raw material funnel and the tuyere. Place a collector, where the collector is wide-mouthed. Adjust the wind speed at the tuyere of the tuyere to 1.1m / s, adjust the flow rate of the alumina powder in the funnel to 0.1L / min, adjust the height between the tuyere and the collector to 0.3m, and adjus...

Embodiment 2

[0039] The preparation process of the medical femoral head prosthesis dense alumina ceramics of the present embodiment is as follows figure 1 Shown:

[0040] 1. Prepare the alumina powder with a particle size of 0.2-2.0 microns according to the ratio of adding 15-25 alumina balls with a diameter of 8-12 mm per 100 grams of alumina powder, and then pour it into the ball mill tank High-speed ball milling for 3~5 hours; then pour figure 2 In the funnel of the winnowing device shown. figure 2 The winnowing device shown includes a raw material hopper, tuyere and a collector. The tuyere is set under the mouth of the raw material funnel, and a control valve is installed at the mouth of the raw material funnel and the tuyere. Place a collector, where the collector is wide-mouthed. Adjust the wind speed at the tuyere of the tuyere to 1.0m / s, adjust the flow rate of the alumina powder in the funnel to 0.12L / min, adjust the height between the tuyere and the collector to 0.28m, and ad...

Embodiment 3

[0046] The preparation process of the medical femoral head prosthesis dense alumina ceramics of the present embodiment is as follows figure 1 Shown:

[0047] 1. Prepare the alumina powder with a particle size of 0.2-2.0 microns according to the ratio of adding 15-25 alumina balls with a diameter of 8-12 mm per 100 grams of alumina powder, and then pour it into the ball mill tank High-speed ball milling for 3~5 hours; then pour figure 2 In the funnel of the winnowing device shown. figure 2 The winnowing device shown includes a raw material hopper, tuyere and a collector. The tuyere is set under the mouth of the raw material funnel, and a control valve is installed at the mouth of the raw material funnel and the tuyere. Place a collector, where the collector is wide-mouthed. Adjust the wind speed at the tuyere of the tuyere to 1.1m / s, adjust the flow rate of alumina powder in the funnel to 0.11L / min, adjust the height between the tuyere and the collector to 0.32m, and adjust...

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Abstract

The invention discloses a preparation method of a medical femoral head prosthesis dense alumina ceramic material with compact microstructure and excellent mechanical properties. The present invention optimizes the raw material of alumina powder, and adopts the chemical coprecipitation method to separate the Mg(NO 3 ) 2 ·6H 2 O, ZrOCl 2 ·8H 2 O and YCl 3 The three mixed substances are evenly coated on the particle surface of alumina powder; the Mg(NO 3 ) 2 ·6H 2 O, ZrOCl 2 ·8H 2 O and YCl 3 generate MgO, ZrO and Y, respectively 2 o 3 ; Aluminum oxide powder is molded into a body by cold isostatic pressing; low-temperature pre-sintering is used to prepare alumina ceramics with low hardness; high-temperature re-sintering is used to prepare dense alumina ceramics with excellent mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for preparing a dense alumina ceramic material. The prepared dense alumina ceramic material is used in the medical field and is an ideal femoral head implantable prosthesis. Background technique [0002] Alumina ceramics have high hardness, good chemical inertness and hydrophilicity, and are ideal materials for medical implantable prostheses, especially for replacement of femoral heads (Y.Z. Cai, S.G. Yan, Development of ceramic on ceramic implants or total hip arthritis. Orthop. Surg. 2 (2010)175–181.). In the past two decades, various advanced processes and key technologies for preparing alumina ceramic prostheses have been explored and summarized one after another. As a commonly used additive, magnesium oxide can significantly increase the density and hardness of alumina ceramics (G. Heimke, S. Leyen, G. Willmann. Knee arthritis: recently developed cera...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/628A61L27/10
CPCC04B35/10A61L27/10A61L2430/02C04B35/62805C04B2235/3206C04B2235/3217C04B2235/3225C04B2235/3244C04B2235/5427
Inventor 李向明李刚高明军
Owner YANTAI UNIV
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