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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, improved bonding strength and low cost.

Inactive Publication Date: 2008-10-08
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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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Experimental program
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Effect test

specific Embodiment approach 1

[0025] Embodiment 1: The active bio-piezoelectric ceramic coating in 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 implementation mode 2: This implementation mode takes the preparation of an active bio-piezoelectric 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 cleaned and degreased by ultrasonic in acetone and alcohol solution, and dried for later use.

[0028] 2. Micro-arc oxidation: The generation of an oxide film layer 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 a micro-arc oxidation method, which is through the following The program achieves:

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

specific Embodiment approach 3

[0046] Specific implementation mode three: this implementation mode is realized in this way:

[0047] 1. Substrate pretreatment: select a pure titanium sample of 10cm×10cm×2cm; use 400 # 、600 # , 800 # and 1000 # Silicon carbide sandpaper was used to polish the sample in turn, ultrasonic cleaning was performed with acetone and alcohol for 15 minutes, and 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, it is necessary to 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 pure): 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...

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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 in particular relates to a bioactive piezoelectric composite ceramic coating and a preparation method thereof. Background technique [0002] At present, the clinically used bone tissue substitute materials are mainly metals and ceramics. Because metals and ceramics have certain deficiencies in bioactivity and mechanical properties, their further clinical application is limited. Although metal biomaterials have good mechanical properties, they are biologically inert materials, and their structure and properties are quite different from those of bone tissue. When used as hard tissue implant replacement materials such as bones and teeth, the combination with bone is a mechanical problem. Locked, no osteoconductivity, unable to integrate with human bone tissue. Hydroxyapatite (HA) is the main component of bone. As a replacement material for bone tissue repair...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L27/30A61L27/32A61L27/42A61L27/02A61L31/00A61K6/033C25D11/02C25D13/00A61K6/838
Inventor 郑玉峰成艳李莉
Owner HARBIN ENG UNIV
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