Complex oxide powders for industrial development – from custom formulation to synthesis in the shaped component
Functional ceramics are critical when components must not only be mechanically stable but also deliver targeted electrical, thermal, magnetic, or ionic properties. At the same time, demands on materials are increasing: compositions are becoming more complex, development cycles shorter, and required material quantities frequently fall between laboratory scale and industrial series production.
This is exactly where we come in. We develop and synthesize custom ceramic oxide materials for research and development projects – flexibly, reproducibly, and with a view to the subsequent shaping and sintering process.
From Raw Material to Functional Material
Our current range of experience includes, among others:
- STF, a strontium titanium iron oxide based on the perovskite structure,
- YBCO, a yttrium barium copper oxide for high-temperature superconductor applications,
- Ca₀.₉Sr₀.₁MnO₃, a doped calcium strontium manganate.
The respective materials are produced from defined starting materials such as oxides and carbonates. However, the decisive factor is not solely the nominal chemical composition. For subsequent processing, reactivity, homogeneity, particle size, agglomeration, phase purity, and behavior during the thermal process are equally important.
That is why we do not view powder synthesis in isolation, but as part of a process chain: from the selection and mixing of raw materials through thermal treatment to shaping and to the function of the finished ceramic component.
A Special Advantage of Solid-State Synthesis
Solid-state synthesis offers an interesting option for suitable material systems: the precisely adjusted raw-material mixture can be used directly for shaping. The desired ceramic phase then forms during the thermal process within the shaped body.
The process can be illustrated in simplified form as follows:
**Raw-material mixture → Shaping → Reaction sintering → Functional ceramic**
Compared to a conventional process route with upstream calcination and subsequent powder processing, this can reduce process steps. In addition – depending on the material system and the specific process execution – intermediate grinding and additional material handling are eliminated. This can facilitate the development of custom geometries and reduce the risk of contamination or undesired changes to the powder.
For YBCO, we have already successfully implemented this approach. A stoichiometrically precise mixture of Y₂O₃, BaCO₃ and copper oxide was used for shaping. Formation of the YBCO material then took place during thermal treatment within the shaped body.
This result is more to us than a single synthesis proof. It shows that materials development and ceramic process development can be meaningfully combined.
Not Every Ceramic Needs the Same Process
Whether direct synthesis within the shaped component is possible and advantageous depends on several factors. These include, among others:
- Reactivity and grain size of the starting materials,
- Release of CO₂ from carbonates,
- Heating and binder burnout conditions,
- Diffusion paths and reaction kinetics,
- Volume changes during phase formation,
- Possible pore formation, crack formation, or warpage,
- Desired phase purity and function of the component.
Therefore, we develop the process route specifically for the material and application. Depending on the goal, the suitable solution may be a calcined functional powder, a reactive precursor mixture, or a combination of materials and process development.
Custom Syntheses for Research and Development
We support industrial development teams in producing materials that are unavailable in standard catalogs or not available in the required quality. Our offer is aimed in particular at projects requiring small to medium batches, short development paths, and close technical coordination.
Possible services include:
- Feasibility and development syntheses,
- Custom oxide compositions and dopings,
- Reactive starting mixtures for reaction sintering,
- Reproducible batches on a gram to kilogram scale,
- Defined thermal process execution,
- Documentation and characterization of the produced materials.
Our goal is not merely to deliver a formulation. We want to provide a material that supports the customer’s next process step – from shaping to the production of a functional ceramic component.
Interested in a Custom Synthesis?
Are you looking for a complex oxide powder, a defined raw-material mixture, or would you like to examine whether synthesis and shaping can be integrated in your material system?
Contact us for an initial technical discussion. Together we will clarify composition, target quantity, shaping method, thermal process execution, and the required material properties.
- Dr. Axel Pelka
- a.pelka@wzr-ceramic.de
- +49 2226 911779-16
