Ceramic precursor slurry and 3D printing reaction forming method of porous ceramic part

Abstract

The invention discloses a ceramic precursor slurry and a 3D printing reaction forming method of a porous ceramic part. The method comprises the following steps: preparing a lithium orthosilicate precursor ceramic slurry for photocuring 3D printing; printing a precursor ceramic biscuit structure with uniform material and structure through a photocuring 3D printing technology; and carrying out two-step sintering on the precursor ceramic biscuit to obtain a lithium orthosilicate porous ceramic sample piece. According to the invention, the lithium orthosilicate ceramic part is prepared by a 3D printing technology, without expensive and difficult-to-obtain lithium orthosilicate powder; instead, the precursor powder with low price is subjected to 3D printing and high-temperature sintering reaction to generate the porous ceramic structure of the lithium orthosilicate material; therefore, the prepared lithium orthosilicate ceramic is high in purity and uniform in grain distribution, and any complex structure can be realized, so that a larger specific surface area is realized, the tritium production efficiency of a tritium breeding ceramic part is improved, and the service life of the tritium breeding ceramic part is prolonged.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a 3D printing reaction forming method for ceramic precursor slurry and porous ceramic parts. Background technique [0002] Tritium-producing test blanket (Test Blanklet Module, TBM) module is one of the three major engineering goals of the international thermonuclear experimental fusion reactor ITER. At the same time, it is also the core component of fusion engineering experimental reactors, demonstration reactors and commercial fusion power plants. It undertakes the main functions of multiplying tritium fuel and extracting fusion energy in various reactor types. As the most important functional material in TBM modules, lithium-based ceramics have received extensive attention from domestic and foreign research due to their good stability, high safety, and no magnetohydrodynamic effects. The main research object; and lithium orthosilicate (Li4SiO4) material has good chemical ...

AI Technical Summary

Problems solved by technology

However, there are also great challenges in 3D printing directly using lithium orthosilicate powder

On the one hand, the preparation process of lithium orthosilicate powder is complicated, the output is low, the cost is high, and it is difficult to find commercial powder products for direct sale on the market; on the other hand, 3D printing has relatively high requirements for ceramic powder specifications, especially light-cured 3D Printing requires micro-nano-level powder materials, which are not easy to obtain for lithium orthosilicate

In addition, lithium orthosilicate powder is easy to react with carbon dioxide and moisture in the air at room temperature, affecting the phase purity of lithium orthosilicate material, which is not conducive to the subsequent printing process

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