Magnetic liquids consist of magnetic material: zero-dimensional nanoparticles, which are not further divided into domains (Weiss areas). This material is dispersed in an aqueous solution such that agglomeration of the particles is excluded under the action of an external magnetic field also. This is ensured by a corresponding coating of the particles. If a magnetic field is applied vertically, the liquid dispersion assumes almost the character of a solid. Steadily is growing the economic value of nanomaterials consisting of particles, which are at least in one dimension smaller than 100 nm. The latter are outside magnetic fields located in the thermodynamic equilibrium.
When it comes to print applications for safety purposes, e.g. to the printing of the MICR lines of checks, a precise adjustment of the particle size of the magnetic material is necessary. Two parameters are decisive: the nozzle size of the inkjet print heads on the one hand and the signal strength (magnetization saturation) required by the magnetic reading devices on the other.
When nano-particles are stably suspended in liquids (water or oil), it is called nano-fluids.
Nano-ferrofluids also have optical and chemo-physical properties (density, thermal expansion, thermal conductivity,
In the production of magnetic special inks, we have many years of experience.