{"id":4015,"date":"2015-04-30T10:16:42","date_gmt":"2015-04-30T10:16:42","guid":{"rendered":"http:\/\/mirror.s-vt.net\/suspendieren\/"},"modified":"2026-10-26T17:22:23","modified_gmt":"2026-10-26T16:22:23","slug":"suspension","status":"publish","type":"page","link":"https:\/\/www.s-vt.net\/en\/suspension\/","title":{"rendered":"Suspension"},"content":{"rendered":"

A suspension is a heterogeneous mixture of a liquid and solids distributed in it. Suspending is the process of bringing these two together. An agitator, usually together with a dispersing agent, slurries the solids and keeps them in suspension.<\/p>

<\/i>No agglomerates<\/strong>Solids are broken up and finely distributed.<\/span><\/div>
<\/i>Hardly any sedimentation<\/strong>Thickeners and stabilisers keep particles suspended.<\/span><\/div>
<\/i>High flow<\/strong>In all areas of the vessel.<\/span><\/div><\/div>

Coarse, fine or colloidal<\/h2>

This solid-liquid mixture<\/a> is a type of dispersion<\/a>. Depending on the size of the solids, there are three groups:<\/p>

<\/i>

Coarse suspension<\/h3>

For example chalk slurry. Coarsely dispersed systems tend strongly to settle.<\/p><\/div>

<\/i>

Fine suspension<\/h3>

For example milk of lime. The particles are much smaller.<\/p><\/div>

<\/i>

Colloidal dispersion<\/h3>

Particles below about 1 \u00b5m. It lies between a true solution and a suspension. Gels also belong to this group.<\/p><\/div><\/div>

Applications<\/h2>

Many everyday liquids are suspensions, such as orange juice, cocoa or wheat beer. Mortar and concrete are mineral suspensions. In the photovoltaic and semiconductor industry, suspensions of silicon carbide and polyethylene glycol cut wafers. Examples from our field:<\/p>

Pharmaceutical suspensions<\/span><\/i><\/a>Food supplements<\/span><\/i><\/a><\/div>

What matters when suspending<\/h2>

The goal is a mixture that is as even as possible, even though it will never be truly homogeneous. The solid phase remains as particles and does not dissolve.<\/p>