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Active bio piezoelectric ceramic coating layer and method of preparing said coating layer on titanium base body surface

A bio-piezoelectric ceramic and titanium substrate technology is applied in the field of surface modification of biomedical materials, which can solve the problems of difficult control of film composition and film fluorine content, and achieve the effects of easy control of deposition process, convenient operation and low deposition temperature.

Inactive Publication Date: 2006-06-14
HARBIN ENG UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to overcome the deficiencies in the existing coating and technology that the film composition and the overall fluorine content of the film are difficult to control, the present invention provides an active bio-piezoelectric ceramic coating and a method for preparing the coating on the surface of a titanium substrate

Method used

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specific Embodiment approach 1

[0025] Specific embodiment 1: The active biopiezoelectric ceramic coating of this embodiment is a composite coating of fluorohydroxyapatite and barium titanate. The doping content of barium titanate in the composite coating is 1-20% of the weight concentration of fluorohydroxyapatite.

specific Embodiment approach 2

[0026] Specific embodiment 2: This embodiment takes the preparation of an active biopiezoelectric ceramic coating on the surface of a titanium substrate as an example, and the specific content includes the following aspects:

[0027]1. Substrate pretreatment: The substrate is medical pure titanium and titanium alloy. After the sample is polished with SiC sandpaper, it is ultrasonically cleaned and degreasing in acetone and alcohol solution, and dried for later use.

[0028] 2. Micro-arc oxidation: The formation of an oxide film with a dense inner layer, a porous outer layer and a suitable Ca / P ratio on the surface of titanium and titanium alloys described in this embodiment involves the micro-arc oxidation method, which is achieved by the following What the scheme achieves:

[0029] a. Preparation of electrolyte: the electrolyte solution is composed of calcium phosphate, phosphate and calcium salt or phosphoric acid and calcium salt. The ratio of Ca / P atoms in the electrolyte is c...

specific Embodiment approach 3

[0046] Specific implementation manner 3: This implementation manner is implemented as follows:

[0047] 1. Substrate pretreatment: select a pure titanium sample of 10cm×10cm×2cm; use 400 # , 600 # , 800 # And 1000 # The samples were polished with silicon carbide sandpaper in sequence, and ultrasonically cleaned with acetone and alcohol for 15 minutes, then cleaned with deionized water, and dried naturally.

[0048] 2. Micro-arc oxidation: the dried sample is subjected to micro-arc oxidation. At this time, ensure that the sample is in close contact with the fixture. The formula and oxidation process of the micro-arc oxidation electrolyte are as follows:

[0049] CaH 2 PO 4 (Analytical grade): 9~15g / l;

[0050] Deionized water: pH=7~8;

[0051] Anode: pure titanium;

[0052] Cathode: The stainless steel lining of the electrolytic cell is used as the cathode;

[0053] Voltage: 400V;

[0054] Current density: 30mA / cm 2 ;

[0055] Pulse frequency: 1000Hz;

[0056] Temperature: 40~50℃; ...

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Abstract

A coated active biologic piezoelectric layer on Ti substrate is prepared from fluorohydroxy apatite (FHA) and barium titanate (BT) through cleaning the surface of Ti substrate, microarc oxidizing to form a porous oxide film layer, and electrophoretic deposition to form a FHABT layer on the surface of Ti substrate. Its advantages are easy control to content of F, high implantation stability, binding power to interface, biocompatibility and bioactivity, and high effect to promote generation of biologic bone and taking part energy conversion in human body.

Description

Technical field [0001] The invention belongs to the technical field of surface modification of biomedical materials, and specifically relates to a bioactive piezoelectric composite ceramic coating and a preparation method thereof. Background technique [0002] The bone tissue substitute materials currently used clinically are mainly metals and ceramics. Due to their respective deficiencies in biological activity and mechanical properties, metal and ceramic materials have limited their further clinical application. Although metal biomaterials have good mechanical properties, they are biologically inert materials, and their structure and properties are very different from those of bone tissue. When used as a substitute for bone, tooth and other hard tissue implantation materials, the combination with bone is a mechanical Locked, without osteogenic conductivity, and cannot be integrated with human bone tissue. Hydroxyapatite (HA) is the main component of bone. As a replacement mater...

Claims

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Application Information

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IPC IPC(8): A61L27/30A61K6/838A61L27/02A61L27/32A61L27/42A61L31/00C25D11/02C25D13/00
Inventor 郑玉峰成艳李莉
Owner HARBIN ENG UNIV
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