|638 - Abstract:|
|In space, a trend towards hydrogen peroxide propellants is noticeable. An improved catalytic bed based on a solid catalytic ceramic substrate lattice is advantageous regarding this trend. As the production of catalytic ceramic lattices with additive manufacturing is difficult, a new production method was developed. Licence agreements are sought.|
With the invented method, 3D ceramic lattices are produced, for instance, for use in catalytic applications. The ceramic article is manufactured by using a 3D-printed or 3D-weaved metal preform. The preform is placed in a gas-filled heating chamber exposed to a predetermined time-temperature profile. This leads to a controlled metal-gas reaction of the preform with a gas. At least, a part of the preform transforms into a ceramic.
Using this method for space, a catalytic ceramic lattice can be manufactured by 3D-printing the structure as a metallic form and then carrying out a special two-stage heat and oxidation treatment afterwards. The metal turns to an oxide in a controlled manner. This treatment is then followed by a chemical treatment to wash the catalyst on to the surface in nanoparticulate form.
Innovations and advantages:
- High cost reduction in comparison to current methods.
- Down to nano-size control over the spatial configuration of the material and the inner structure of a porous or lattice-type ceramic article.
- Avoids loose powder as in state-of-the-art techniques.
- Less ageing and degradation of thrusters performance, increased reliability.
Domain of application:
Apart from the original propose for which this invention has been designed (ionic thrusters), the catalytic ceramic lattices obtained might also provide benefits for different processes like:
- Gas purification by dehydration or desulfurization
- Crude hydro-processing
- Vehicle or industry emission purification
- Bad smell removal
- Energy saving heat exchange applications (steel works and metallurgy industry)
- Biomedical applications (artificial ceramic-based tissues that allow oxygen supply).
Many companies and end-users from the chemical, materials, manufacturing, automotive, biomedical and energy sectors, could be interested in this invention.