The Pulverisette 2 from Fritsch has been used in the fine distribution of pure liquid mercury in a mixture of fine solid metal powders.
During the manual mixing with a spatula with careless work methods, up to 3mm large amalgam grains were produced.
The Pulverisette 2 mortar mill, with an agate grinding set and special adjustments for the minimising of the application of energy found, was selected.
From the area of mixtures liquid-solid is the production of filled pastes to be mentioned.
Especially challenging here is to add as much as possible solids in the high-viscosity organic phase.
An additional example for this is, when one has to add to organic binder (for example, synthetic resin or varnish or in the simplest case oil) fine metallic, ceramic or inorganic powders.
High-viscosity pastes evolve that can be compared with shoe polish in a tube.
Experts often talk about filled composite materials.
Often the increase of the degree of the solid content is the goal of all activities.
In this concrete case, a metallic powder was to be added to a synthetic resin of high viscosity.
The Pulverisette 2 equipped with a grinding set of hardened steel was selected.
With processing times of up to 30min, the successive addition of the powder and supported by the slight warming from the applied comminution energy, up to 80 per cent of the mass percentage of the solid was homogenously mixed in.
From the areas of mixtures solid-liquid the contamination of ceramic powders with very little amounts of solved in liquid substances are to be mentioned.
For the test the Pulverisette 2 with an agate grinding set was chosen.
The iron nitrate solution was used as the model-solution coloured and therefore the homogeneity of the mixture was easily visually evaluated.
While the mill was grinding, approximately 1ml liquid in 50g powder were instilled.
Afterwards it was further homogenised.
After five minutes a visual consistent system was created.
