Deflocculant Ceramics Definition

In ceramics this term refers to the flow and gel properties of a glaze or body suspension made from water and mineral powders with possible additives deflocculants modifiers.

Deflocculant ceramics definition.

Deflocculant definition a chemical added to slip to increase fluidity. Some slips will also give a moderate degree of the hardening effect and decreased permeability that a ceramic glaze would give. In ceramics there are a number of different deflocculants available. Deflocculant definition is an agent that causes deflocculation.

Darvan 811 is a deflocculant that is similar to darvan 7 but is more. There are different varieties of darvan. Slipware is pottery decorated by slip placed onto a wet or leather hard clay body surface by dipping painting or splashing. The treatment of clay by means of a wet grinding and deflocculation process is a widely used technique by the floor and wall tiles ceramic industry.

Darvan is a liquid deflocculant that is often preferred for use with plaster molds because unlike some other deflocculants darvan does not degrade the plaster. In ceramic industry glazes are often sprayed especially in sanitary ware. Often only pottery where the slip creates patterns or images will be described as slipware as opposed to the many types where a plain slip. The most efficient compounds having deflocculant action for uses in ceramics are sodium silicate polyphosphates pyro tripoly tetrapoly etc and organic sodium and ammonium polyelectrolytes.

A chemical as sodium carbonate added to a clay slip to minimize settling out. Water in ceramics water is the most important ceramic material it is present every body glaze or engobe and either the enabler or a participant in almost every ceramic process and phenomena. Thixotropic suspensions flow when you want them to and then gel after sitting for a few moments. Following the development of single firing processes the need for atomised clay has led to the use of these processes.

No single product acts according to all of the mechanisms described above therefore a mixture of various compounds is usually used whose combined.