Hydroxyl apatite/diopside composite bioceramic material and preparing technique thereof

Abstract

The invention relates to a compound biological ceramic material with hydroxyapatite as base, diopside as toughening reinforcement and a preparation technique thereof. The compound biological material is prepared with hydroxyapatite and diopside as raw materials. The technical process includes the steps that: 80 percent to 95 percent of hydroxyapatite and 5 percent to 20 percent of diopside are prepared as raw materials by weight percentage, then are subject to the mixed ball milling and are agglomerated at a temperature of 1,300 to 1,320 DEG C and a sintering pressure of 20 to 30MPa in an atmosphere of nitrogen for 30 to 60 minutes. The compound biological ceramic material prepared through the invention not only has low cost, but also has favorable biological compatibility and better mechanical properties such as fracture toughness, bending strength, etc than pure HA, thus having a bright application prospect in the repair and substitution of human bones.

Description

technical field [0001] The invention belongs to the intersecting field of material science and biomedicine, and in particular relates to a composite bioceramic material with hydroxyapatite ceramic material as a matrix and diopside as a toughening and reinforcing body and a preparation process thereof. Background technique [0002] Hydroxyapatite (Hydroxyapatite, HA or HAP) is a kind of biologically active material with good biocompatibility. inductive. However, due to its high brittleness, low flexural strength and fracture toughness, hydroxyapatite is strictly limited to use in non-dynamically loaded environments. Therefore, it is limited in the application of load-bearing materials, and its functionality is not outstanding. Whisker-reinforced HA composites have good toughening effect, but whiskers are considered as potential carcinogens. In addition, the whiskers used for reinforcement can enter the human body from hydroxyapatite, easily causing serious health problems....

AI Technical Summary

Problems solved by technology

However, the addition of carbon nanotubes greatly increases the preparation cost, and the mechanical properties of the composite material fluctuate widely.

The test also found that when the mass content of carbon nanotubes exceeds 25%, due to the low density of carbon nanotubes, the positions of the matrix and the reinforcement phase are exchanged, and it is difficult to synthesize the required materials at a temperature of about 1300 ° C.