LAURSEN, A.; LAURSEN, ANDERSON.; http://lattes.cnpq.br/5806021036385085; LAURSEN, Anderson.
Resumo:
One of the main raw materials used in the sanitary ware industry is
clay “ball clay. However, Brazil is scarce in deposits of this clay. Like this,
This work aims to investigate the replacement of a reference clay
by regional clays, of greater abundance, in the formulation of earthenware masses
Sanitary. To achieve this objective, the methodology of this Thesis work was
divided into two parts. The first part aimed to characterize clays
alternative plastics and the analysis of their potential for total replacement of a
reference “ball clay” in a commercial ceramic formulation for tableware
sanitary conditions and the evaluation of the rheological and technological behavior of these masses
developed ceramics; and the second part sought to analyze the partial replacement
(3, 5 and 7%) of a reference “ball clay” in a ceramic formulation
commercial use of sanitary ware using smectite clays. The composition was determined
chemical and mineralogical, particle size distribution, plasticity and resistance
the green of the analyzed clays; the formulations were then produced and
specimens formed by gluing. These bodies were burned in 1150,
1200 and 1250°C and their physical and microstructural characteristics analyzed. The clays
alternative plastics were predominantly composed of kaolinite and quartz,
with some containing smectite clay mineral. Some clays presented
mineralogical composition and granulometric distribution similar to “ball clay” from
reference. Using alternative plastic clays, it was possible to obtain bodies
ceramics with water absorption and mechanical resistance similar to those obtained
using a reference clay in the formulation using lower temperatures
burning. The use of smectite clays in partial replacement of clay
reference caused an increase in the viscosity of the dispersions, but within the range
used commercially by the sanitary ceramics industry and showed that it is
It is possible to partially replace the reference clay with small amounts of clay
smectites, obtaining bodies with resistance and absorption similar to those of the mass of
reference.