Apparently invisible. Chemistry in ceramics.

By: Zschimmer & Schwarz Ceramco
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  • Summary

  • Aware of how complex the problems related to the world of chemistry applied to ceramic production processes can be, we want to share our knowledge with those who want to orient themselves or train for passion or profession.
    Through a simple and direct language, the podcast aims to be an educational space with a focus on products, applications and processes.
    The journey unfolds along the ceramic production lines.
    At each stage a topic.
    At each topic a critical issue.
    At each critical issue, when possible, a solution.
    Copyright Zschimmer & Schwarz Ceramco
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Chemistry
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Episodes
  • Glaze and grit suspensions: differences & similarities

    Glaze and grit suspensions: differences & similarities
    Nov 25 2024
    Glaze and grit suspensions are made up of a liquid part (usually made-up of water and one or more rheological chemicals) and a dispersed solid part.

    However, these two different suspensions show a lot of differences that may lead to very contrasting results, also implying a different approach about chemicals, both during the grinding phase and along the glazing line.

    From this point of view, all chemicals involved must be marked by specific features according their intened use. What do we need to know about the subject?
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    24 mins
  • Cratering phenomena: what they are, how they develop and how to manage them

    Cratering phenomena: what they are, how they develop and how to manage them
    Nov 12 2024
    Cratering phenomena are defects that appear as microscopic craters on the surface of ceramic bodies on which an aqueous (and still drying) suspension has been discharged.

    It is an application problem that leads to a misalignment of the suspension due to the presence of one or more dips.

    The problem, that is already visible along the glazing line and not only after the firing process, may arise for several reasons: for example due to the presence of impurity within the ceramic raw materials or because of an improper use of defoamers.

    The episode try to offer a list of the most important causes, pointing out the mechanisms behind the problem, also providing some suggestions to prevent and/or eliminate it.
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    23 mins
  • Carboxymethylcellulose: what is it for & how to use it?

    Carboxymethylcellulose: what is it for & how to use it?
    Oct 28 2024
    CMC are organic compounds, water-soluble polymers derived from cellulose, widely used in several fields of industrial production. In ceramics, sodium CMCs perform multiple functions within suspensions and solutions and can be marked by very different properties depending on the situation.

    What is the main role of this substance in the ceramic production process, and what needs to be done to properly manage it?
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    13 mins

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