Episodes

  • Chemicals & seasonality: problems and suggestions

    Chemicals & seasonality: problems and suggestions
    Dec 23 2024
    After addresing the impact that seasonality can have on the the fluidization of ceramic mixtures and on bacterial proliferation within semi-finished products, this second part of the episode 41 tries to show and explain the consequences that temperature changes may produce on the drying time of ceramic suspension, leading to alterations that often force producers to revise the parameters of the glazing line.

    After offering the usual suggestions to handle the problem, the episode ends with a focus on the solubility of surfactants that can be also susceptible to seasonal and temperature changes.
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    14 mins
  • Chemicals & seasonality: problems and suggestions

    Chemicals & seasonality: problems and suggestions
    Dec 10 2024
    In ceramics, the use of chemicals plays a fundamental role in providing the final product with high technical and aesthetic results and in promoting a proper application process.

    However, their actions can be sometimes less effective or compromised.

    There are several reasons for this performance change and seasonality is surely one of the most interesting.

    Through a series of examples, the episode addresses the actions that should be taken to prevent the temperature to negatively affecting both processes and products.
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    20 mins
  • 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
  • Plasticity of ceramic mixtures: values and application fields

    Plasticity of ceramic mixtures: values and application fields
    Oct 14 2024
    The plasticity values of ceramic mixtures is a very important issue, since it affects the values and features of the mix and therefore the proper development of the ceramic production process.

    In general, the use of clays marked by high plasticity values is usually synonymous with easier process management.

    However, high-performing clays are not always available and it is therefore important to keep in mind other production parameters, finding a balance or even good compromises.

    After a short definition of this amazing physical property, the episode offers a general overview on the issue.

    Not only in relation to tiles production.
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    14 mins
  • How to improve the printing definition of digital inks?

    How to improve the printing definition of digital inks?
    Oct 4 2024
    In ceramics, digital technology (use of digital glues and digital inks) has definitely riform the sector, making the production process much more flexible and expanding creative and aesthetic possibilities.
    The extraordinary precision with which the ink is discharged on the ceramic support, in fact, has opend to new extraordinary results.

    However, the topic "printing definition" must be addressed with great attention, being subjected to several variables that can affect the final product.

    What are these variables? What mechanisms are behind them and what can be done to not compromise a good resolution?
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    14 mins
  • Scanning Electron Microscope & ceramic production

    Scanning Electron Microscope & ceramic production
    Sep 16 2024
    Scanning Electron Microscope is a sophisticated tool used in many fields of scientific research, even in ceramics.

    The use of an electron beam instead of light allows to get not only outstanding high resolution images but also detailed information on the composition of the sample.

    Insights are so accurate and exhaustive that offer manufacturers clear solutions or, at least, suggestions about the actions that should be taken to properly solve production critical issues.

    How does the tool work and what are its most important functions to support ceramic industry?
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    20 mins