Thomas Konegger
YOU?
Author Swipe
View article: Freeze-cast SiOC ceramics supporting the growth of industrially relevant microorganisms
Freeze-cast SiOC ceramics supporting the growth of industrially relevant microorganisms Open
Investigating the compatibility of ceramic support materials with industrially relevant microorganisms is a key starting point towards utilizing innovative ceramic frameworks for microbial culture support. This study demonstrates the bioco…
View article: Binuclear and mononuclear active sites of porous tin-organic frameworks for selective epimerization of D-glucose into D-mannose
Binuclear and mononuclear active sites of porous tin-organic frameworks for selective epimerization of D-glucose into D-mannose Open
Porous tin-organic frameworks (Sn-OFs) are composed of Lewis acid Sn4+ sites connected via organic linkers by tin-carbon covalent bonds. Although high activity of Sn-OFs for selective epimerization of D-glucose into D-mannose has been repo…
View article: Differentiated Slip Casting: Producing Variable Thickness Ceramic Tiles with Functionally Graded Plaster Moulds
Differentiated Slip Casting: Producing Variable Thickness Ceramic Tiles with Functionally Graded Plaster Moulds Open
This paper introduces a method that enhances the traditional slip casting technique’s potential to fabricate ceramic objects with variable thickness. The variability depends on the different filtration rates offered by plaster moulds of va…
View article: Microporosity evolution in polymer‐derived SiOC glasses pyrolyzed in different atmospheres
Microporosity evolution in polymer‐derived SiOC glasses pyrolyzed in different atmospheres Open
Polymer‐derived ceramics (PDCs) are a class of advanced materials obtained by pyrolysis in a controlled atmosphere of an organosilicon polymer. Their functional as well as mechanical properties originate from the peculiar nanostructures de…
View article: Silicon Oxycarbide (SiOC)-Supported Ionic Liquids: Heterogeneous Catalysts for Cyclic Carbonate Formation
Silicon Oxycarbide (SiOC)-Supported Ionic Liquids: Heterogeneous Catalysts for Cyclic Carbonate Formation Open
Silicon oxycarbides (SiOCs) impregnated with tetrabutylammonium halides (TBAX) were investigated as an alternative to silica-based supported ionic liquid phases for the production of bio-based cyclic carbonates derived from limonene and li…
View article: Hydrothermal synthesis of ZnZrO <sub> <i>x</i> </sub> catalysts for CO <sub>2</sub> hydrogenation to methanol: the effect of pH on structure and activity
Hydrothermal synthesis of ZnZrO <sub> <i>x</i> </sub> catalysts for CO <sub>2</sub> hydrogenation to methanol: the effect of pH on structure and activity Open
With the growing necessity of achieving carbon neutrality in the industrial sector, the catalytic hydrogenation of carbon dioxide into methanol has been widely considered one of the key strategies for the utilization of captured CO 2 .
View article: Correction: Hydrothermal synthesis of ZnZrO<sub><i>x</i></sub> catalysts for CO<sub>2</sub> hydrogenation to methanol: the effect of pH on structure and activity
Correction: Hydrothermal synthesis of ZnZrO<sub><i>x</i></sub> catalysts for CO<sub>2</sub> hydrogenation to methanol: the effect of pH on structure and activity Open
Correction for ‘Hydrothermal synthesis of ZnZrO x catalysts for CO 2 hydrogenation to methanol: the effect of pH on structure and activity’ by Issaraporn Rakngam et al. , RSC Sustain. , 2024, https://doi.org/10.1039/d4su00522h.
View article: Hierarchically Porous Ceramic and Metal‐Ceramic Hybrid Materials Structured by Vat Photopolymerization‐Induced Phase Separation
Hierarchically Porous Ceramic and Metal‐Ceramic Hybrid Materials Structured by Vat Photopolymerization‐Induced Phase Separation Open
Additive manufacturing techniques such as vat photopolymerization have laid the foundation for impressive advances in the 3D structuring of ceramic materials. However, simultaneous structuring of these complex‐shaped ceramic objects on the…
View article: Polymer-derived Ni/SiOC materials structured by vat-based photopolymerization with catalytic activity in CO2 methanation
Polymer-derived Ni/SiOC materials structured by vat-based photopolymerization with catalytic activity in CO2 methanation Open
A new concept for the additive manufacturing of nickel-modified polymer-derived ceramics via vat-based photopolymerization is presented. A photoactive polysiloxane resin system modified by nickel nitrate via methacrylic acid complexation w…
View article: Polymer-derived SiOC as support material for Ni-based catalysts: CO2 methanation performance and effect of support modification with La2O3
Polymer-derived SiOC as support material for Ni-based catalysts: CO2 methanation performance and effect of support modification with La2O3 Open
In this study, we investigated Ni supported on polymer-derived ceramics as a new class of catalyst materials. Catalysts have to withstand harsh reaction conditions requiring the use of a support with outstanding thermal and mechanical stab…
View article: Stereolithography-based additive manufacturing of polymer-derived SiOC/SiC ceramic composites
Stereolithography-based additive manufacturing of polymer-derived SiOC/SiC ceramic composites Open
In order to overcome challenges typically encountered during additive manufacturing of ceramics via the polymer precursor route, a novel polymer-derived SiOC/SiC composite system suitable for advanced geometric designs achievable by lithog…
View article: Benign recovery of platinum group metals from spent automotive catalysts using choline-based deep eutectic solvents
Benign recovery of platinum group metals from spent automotive catalysts using choline-based deep eutectic solvents Open
The recovery of platinum group metals (PGMs) from secondary raw materials has become a topic of critical importance mainly due to the gradual depletion of their natural resources and their continuously increasing demand. However, the insuf…
View article: Atmosphere control and secondary phase migration during moderate-temperature sintering of aluminum nitride
Atmosphere control and secondary phase migration during moderate-temperature sintering of aluminum nitride Open
Microstructure and thermal properties of aluminum nitride ceramics are strongly affected by sintering conditions. Reducing sintering environments, which are typically encountered during liquid-phase sintering of aluminum nitride in graphit…
View article: In-situ small angle X-ray scattering (SAXS) – A versatile tool for clarifying the evolution of microporosity in polymer-derived ceramics
In-situ small angle X-ray scattering (SAXS) – A versatile tool for clarifying the evolution of microporosity in polymer-derived ceramics Open
While conventional structural characterization techniques such as gas physisorption have been highly useful in gaining important insights into the general evolution of transient microporosity during the pyrolytic conversion of polymer-deri…
View article: Porosity control in silicon nitride‐based support materials toward enhanced gas permeability
Porosity control in silicon nitride‐based support materials toward enhanced gas permeability Open
Porous Si 3 N 4 materials in tubular geometry are prepared by slip casting before partial sintering. A variety of material‐ and process‐specific variables and their respective effects on densification and resulting pore morphology are syst…
View article: Freeze-casting of highly porous cellulose-nanofiber-reinforced γ˗Al2O3 monoliths
Freeze-casting of highly porous cellulose-nanofiber-reinforced γ˗Al2O3 monoliths Open
Freeze-casting is a powerful consolidation technique for the fabrication of highly porous and layered-hybrid materials, including ceramic-metal composites, and porous scaffolds for catalysis, bone substitutes and high-performance membranes…
View article: Influence of DVB as linker molecule on the micropore formation in polymer-derived SiCN ceramics
Influence of DVB as linker molecule on the micropore formation in polymer-derived SiCN ceramics Open
In this work, the formation of transient microporosity during the polymer-to-ceramic conversion in polymer-derived ceramics was studied using a commercially available poly(vinyl)silazane precursor which was modified with divinylbenzene (DV…
View article: Hydrothermal polymerization of porous aromatic polyimide networks and machine learning-assisted computational morphology evolution interpretation
Hydrothermal polymerization of porous aromatic polyimide networks and machine learning-assisted computational morphology evolution interpretation Open
We report on the hydrothermal polymerization (HTP) of porous polyimide (PI) networks using the medium H 2 O and the comonomers 1,3,5-tris(4-aminophenyl)benzene (TAPB) and pyromellitic acid (PMA).
View article: High modulus polyimide particle-reinforcement of epoxy composites
High modulus polyimide particle-reinforcement of epoxy composites Open
A novel class of fully organic composite materials with well-balanced mechanical properties and improved thermal stability was developed by incorporating highly crystalline, hydrothermally synthesized polyimide microparticles into an epoxy…
View article: A multitechnique, quantitative characterization of the pore space of fired bricks made of five clayey raw materials used in European brick industry
A multitechnique, quantitative characterization of the pore space of fired bricks made of five clayey raw materials used in European brick industry Open
The development and improvement of brick materials is still based on empirical knowledge and large testing series. To enable a physically based optimization in terms of thermal and mechanical properties of clay bricks, detailed knowledge o…
View article: Wet chemical porosification with phosphate buffer solutions for permittivity reduction of LTCC substrates
Wet chemical porosification with phosphate buffer solutions for permittivity reduction of LTCC substrates Open
The wireless high-frequency technology requires a robust, cost-effective, and highly integrated substrate technology offering the capability for areas of tailored permittivity. The wet-chemical porosification of low temperature co-fired ce…
View article: Powder Metallurgy Manufacturing of Iron Aluminides with Different Aluminium Contents and Magnesium Addition by Reactive Hot Pressing
Powder Metallurgy Manufacturing of Iron Aluminides with Different Aluminium Contents and Magnesium Addition by Reactive Hot Pressing Open
In this work, iron aluminide materials, which are promising candidates for high temperature applications, are manufactured through reactive hot pressing of elemental powder mixes, facilitating a straightforward preparation of well-densifie…
View article: Dense, Strong, and Precise Silicon Nitride-Based Ceramic Parts by Lithography-Based Ceramic Manufacturing
Dense, Strong, and Precise Silicon Nitride-Based Ceramic Parts by Lithography-Based Ceramic Manufacturing Open
Due to the high level of light absorption and light scattering of dark colored powders connected with the high refractive indices of ceramic particles, the majority of ceramics studied via stereolithography (SLA) have been light in color, …
View article: Hyperspectral optical coherence tomography for in vivo visualization of melanin in the retinal pigment epithelium
Hyperspectral optical coherence tomography for in vivo visualization of melanin in the retinal pigment epithelium Open
Previous studies for melanin visualization in the retinal pigment epithelium (RPE) have exploited either its absorption properties (using photoacoustic tomography or photothermal optical coherence tomography [OCT]) or its depolarization pr…
View article: Wet-chemical porosification of LTCC substrates: Dissolution mechanism and mechanical properties
Wet-chemical porosification of LTCC substrates: Dissolution mechanism and mechanical properties Open
Low temperature co-fired ceramics (LTCC) technology has been successfully used in microelectronics, automotive, and telecommunication applications. However, their generally high permittivity is unfavorable for micromachined devices operate…
View article: Tailored and deep porosification of LTCC substrates with phosphoric acid
Tailored and deep porosification of LTCC substrates with phosphoric acid Open
Low temperature co-fired ceramics (LTCC) as an advanced technology for robust assembly of electronic components, has attracted significant attention in a wide application range such as in wireless communication or automotive radar systems.…
View article: Pore Morphology Tailoring in Polymer‐Derived Ceramics Generated through Photopolymerization‐Assisted Solidification Templating
Pore Morphology Tailoring in Polymer‐Derived Ceramics Generated through Photopolymerization‐Assisted Solidification Templating Open
A new processing approach combining solidification templating of initially liquid preceramic polymers with a low‐temperature, photoinduced cross‐linking step based on a thiol‐ene click reaction was recently introduced, allowing for the gen…