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Method for preparing tricalcium phosphate/barium strontium titanate composite biological ceramic with minimum curved surface structures on basis of 3D (three-dimensional) printing technologies

A technology of barium strontium titanate and tricalcium phosphate, which is applied in the field of additive manufacturing, can solve the problems of slow repair process, lack of electrical signal conduction, and difficulty in new bone fusion, and achieve high precision molding structure, excellent structural performance, and structural dense effect

Active Publication Date: 2019-05-10
BEIJING UNIV OF TECH
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Problems solved by technology

[0003] The human body's natural bone has piezoelectric properties, and the nerve conduction in it is completed by electrical signals. The repair process of the bone also needs electrical signals to be fed back to the nervous system. Traditional ceramic materials are used as bone substitutes, because they do not have electrical Signal transduction, slow repair process, difficult to integrate with new bone

Method used

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  • Method for preparing tricalcium phosphate/barium strontium titanate composite biological ceramic with minimum curved surface structures on basis of 3D (three-dimensional) printing technologies
  • Method for preparing tricalcium phosphate/barium strontium titanate composite biological ceramic with minimum curved surface structures on basis of 3D (three-dimensional) printing technologies

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Embodiment 1

[0029] 1. Use Solidworks, Rhino and other three-dimensional modeling software to design the required minimum surface structure, and calculate its porosity, adjust according to the mechanical simulation results of the finite element analysis software ABAQUS, and obtain the structural model with the best porosity.

[0030] 2. Configure the special paste required for printing, use 405nm band photosensitive resin as solvent, add appropriate amount of tricalcium phosphate powder, strontium barium titanate powder, binder, photoinitiator, photopolymerizer in sequence, stir and mix thoroughly Ball milling.

[0031] 3. Use the BESK printer to print, first import the print model data into the Q3DP software designed with the printer, adjust the parameters and slice the model, then adjust the substrate to be parallel to the resin tank on the bottom surface and determine the best starting position to Make sure the curing effect of the first layer is good, and start printing normally after ...

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Abstract

The invention discloses a method for preparing tricalcium phosphate / barium strontium titanate composite ceramic with minimum curved surface structures by means of 3D (three-dimensional) printing, andbelongs to the field of 3D printing technologies and biological ceramic. Compositions for the tricalcium phosphate / barium strontium titanate composite ceramic mainly include 35-70 vol% of tricalcium phosphate / barium strontium titanate composite ceramic powder and 30-65 vol% of photosensitive resin premixed liquid. The method has the advantages that DLP (digital light processing) (digital light curing) 3D printing technologies are high in forming speed and printing model precision and low in cost; Rhino software designs are used, minimum curved surface models are optimized, models are importedinto Q3DP software, scanning data are sliced and exported, slurry is prepared according to certain proportions, ball-milling is carried out, the slurry is led into resin grooves of BESK printers, printing is started, printed bodies are further placed into medium-sized furnaces to be degreased and sintered, accordingly, the tricalcium phosphate / barium strontium titanate composite ceramic with the stable structure, excellent mechanical properties, piezoelectric properties and biocompatibility can be ultimately obtained, and the like.

Description

technical field [0001] The invention relates to a 3D printing technology and a composite bioceramic, which belongs to the field of additive manufacturing, and especially uses DLP (digital light curing) 3D printing technology to prepare a tricalcium phosphate / strontium titanate with a very small curved surface structure barium ceramics. Background technique [0002] Tricalcium Phosphate (TCP), also known as tricalcium phosphate, has a variety of crystal transformations, mainly divided into β-TCP and α-TCP. The chemical composition of tricalcium phosphate is similar to the minerals of human bone, and it combines well with bone tissue without rejection, so it is a good bone repair material. The natural physical properties of tricalcium phosphate make it widely used in the medical field. Most of the current studies use β-TCP, because the solubility of α-TCP is too large, and it degrades quickly after being implanted in the human body, so it cannot play the role of artificial b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/447C04B35/622B28B1/00B33Y10/00B33Y70/00A61L27/42A61L27/50A61L27/56
Inventor 曾勇杨天浩
Owner BEIJING UNIV OF TECH
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