8 episodes

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.

Apparently invisible. Chemistry in ceramics‪.‬ Zschimmer & Schwarz Ceramco

    • Science

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.

    Superficial pinholes of ceramic tiles: roots, causes & remedies

    Superficial pinholes of ceramic tiles: roots, causes & remedies

    The ceramic production process - after the early stages that from the formation of the tile under the press lead to the applications of the glazing line - usually involves a final application of grit or glaze. Sometimes in huge amount.

    If you do not meet the proper parameters of the process, this application can lead to several problems able to compromise the ceramic surface, both technically and aesthetically.

    The formation of pinholes is one of the most frequent. What are the roots of the problem and what can we do to prevent it?

    • 11 min
    Clogging of spray nozzle during grit application

    Clogging of spray nozzle during grit application

    In the ceramic tiles prodcution, engobes, grits, and glazes are still applied - to a large extent - by means of airless spray systems.

    chine is equipped with spraying guns that end with special nozzles that properly discharge the suspension on the raw ceramic surface. Sometimes these nozzles can be clogged during application stage, forcing producers to slow down or even stop the production cycle.

    The problem, that has a significant and negative impact on the industrial productivity, can arise because of several scenarios such as a wrong set-up of the application machine, an improper grit grain size or the presence of localized sedimentation phenomena.

    In detail, what are the mechanisms that can lead to the problem and what do you need to know to take the right actions to prevent it?

    • 17 min
    Surface protective products & post-treatment criticalities

    Surface protective products & post-treatment criticalities

    The lapping and polishing processes that provide ceramic tiles with the proper aesthetic features, both involve the removal of a very thin layer of glaze that is on the very external part of the tile.

    Even if the amount of removed material is very small, these processes may bring out to the surface all that micro-porosity that are inside the glaze.

    Since they are no more protected and sealed, the pores remain exposed chemical and dirt attack.

    How do the protective treatments work?

    What are the chemical mechanisms and what kind of benefit do they promote?

    • 11 min
    Process waters & critical issues

    Process waters & critical issues

    Process water play a very important role within ceramic activities, being involved in a wide range of production’s steps. If on the one hand they are strictly necessary to the course of the work, they can lead on the other hand to problems when they do not fits the required production parameters.

    The fourth episode of the podcast APPARENTLY INVISIBLE. CHEMISTRY IN CERAMIC, now available on the leading audio platform, is exactly focused on this topic. We talk about electrical conductivity, net and groundwater, waters clarification, sanitization, pH, depuration, tank storage...

    Which are the most impotant issues?
    What do we should know to prevent or minimize them?

    • 9 min
    Bacterial degradation of semi-finished products

    Bacterial degradation of semi-finished products

    During their storage in the tanks, semi-finished products can be affected by bacterial degradations that, if they are not properly managed, may lead to application critical issues as well as to serious defects in the finished tile product, such as pinholes Just to give an example.

    What kind of action must be taken to face the problem?
    Is it possible to restore the right features of a bacterially compromised suspension?

    • 10 min
    Why do slurries jellify during stocking?

    Why do slurries jellify during stocking?

    The gelling phenomena of slurries inside the storage tanks is not so unusual as one might suppose.
    Let’s find out the causes and identify possible solutions.

    • 9 min

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