Production of Coating Solutions and Products Produced Therefrom

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The invention discloses a process to produce highly concentrated, stable colloidal coating solutions containing oxide nanoparticles (such as BaTiO3 or ZrO2), using microemulsions with cationic surfactants. These solutions enable the creation of dense, nanoscale ceramic layers (50 nm to 1 μm) on various substrates in a single coating step, with improved properties and fewer processing steps than previous methods. Hybrid solutions, combining nanoparticles and organometallic solutions, allow for tuning sintering temperature and material properties.

Use CasesContent extracted from patent full text and abstract with AI.

• Production of high-performance dielectric ceramic layers for electronics (e.g., capacitors, memory devices).
• Microwave resonators and multilayer ceramic capacitors (MLCCs) in miniaturized electronic circuits.
• Deposition of functional ceramic thin films for sensors, actuators, or MEMS (Micro-Electro-Mechanical Systems).
• Coating of metallic or semiconductor substrates with dense ceramic films for microelectronics and embedded components.
• Inkjet printing or spray deposition techniques for patterned or large-area functional coatings.
• Development of nano-composite films with tailored electrical, optical, or magnetic properties.

BenefitsContent extracted from patent full text and abstract with AI.

• Enables formation of dense, crack-free ceramic films with precise thickness in a single step, reducing time and cost.
• High solid content in dispersions allows fewer coating steps, improving process efficiency and scalability.
• Stable colloidal solutions can be stored for longer periods, supporting industrial workflows.
• Flexibility in material design: allows doping, composition adjustments, and creation of composite films with controlled nanostructures.
• Lower sintering temperatures are possible by adding organometallic components, saving energy and enabling coating on temperature-sensitive substrates.
• Produces coatings with improved dielectric constants and fewer defects compared to conventional techniques.

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Patent Abstract

The invention relates to coating solutions for producing tight mesoscopic ceramic layers, consisting of concentrated oxidic nanoparticle dispersions which are produced from humidity-sensitive precursor solutions by a hydrolysis reaction, by means of microemulsions containing cationic surfactants and optionally admixtures of organometallic CSD solutions in a proportion smaller than 50 % in relation to the metal oxide. The CSD solution is added in order to reduce the sintering temperatures required, to produce ceramic composite layers with nanoscale heterogeneity or containing dopings, using other metal combinations, and to increase the density.