Glazing effect for producing environmentally friendly ceramics for cladding applications
This paper presents results of comparative studies of environmental safety of ceramic materials, based on a low-plasticity clay with the introduction of galvanic sludge, boric acid and titanium dioxide in 3 different combinations. The experimental samples were manufactured under 15 MPa p...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Association of Chemical Engineers of Serbia
2021-01-01
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| Series: | Hemijska Industrija |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0367-598X/2021/0367-598X2103167P.pdf |
| Summary: | This paper presents results of comparative studies of environmental safety of
ceramic materials, based on a low-plasticity clay with the introduction of
galvanic sludge, boric acid and titanium dioxide in 3 different
combinations. The experimental samples were manufactured under 15 MPa
pressing pressure and at the maximum firing temperature of 1050 oC. Prior to
the toxicological experiments, diurnal extracts of the materials into the
model neutral and acidic media were obtained. The toxicological safety was
determined by using the Daphnia mortality method, and by comparing the
maximum permissible concentrations of heavy metals for drinking and
household water with the heavy metals’ concentrations in diurnal extracts.
The presented data show that the combined introduction of all the
investigated additives results in the glazing effect of ceramic particles
surfaces so that an environmentally safe material can be produced that
exhibits sufficiently high-performance properties. The use of low-plastic
clay and electroplating sludge expands the raw material base for producing
ceramics and allows the disposal of environmentally hazardous compounds of
heavy metals contained in electroplating sludge. Ceramic materials based on
the developed charge composition can be used for producing items for
external cladding for buildings and structures. |
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| ISSN: | 0367-598X 2217-7426 |