Physical and mechanical properties of ceramics from clays of the west of S. Paulo State, Brazil

Abstract

Clays and ceramics of interest to the structural ceramic industry were characterized. Some physical properties of ceramic masses formulated from artificial deposits exploited by the local industry were also analyzed. All materials investigated exhibit high contents of fine components (< 2 mum) and significant plasticity that is compatible with the presence of a great amount of clay minerals. Ceramic probes were prepared by dry pressing and fired at around 855 °C. Flexural strength, linear shrinkage, water absorption, apparent color and weight loss were measured. In addition, the industrial applications of these raw materials were reviewed and newest potential uses proposed.

Sugarcane Bagasse Ash as a Potential Quartz Replacement in Red Ceramic

“…Mica (10.01 and 4.99 Å), quartz (4.26 and 3.34 Å), gibbsite (4.85 Å), goethite (4.18 Å), lepidocrocite (6.30Å), and probably montmorillonite (∼12.5 Å), a 2:1 clay mineral are the minor phases 25 . This mineralogical composition is common to clays from this region 26,27 . Mica and gibbsite increase the K and Al concentrations in the sample, respectively.…”

“…25 This mineralogical composition is common to clays from this region. 26,27 Mica and gibbsite increase the K and Al concentrations in the sample, respectively. Titanium, iron, phosphorus, and other compounds act as nucleating agents in glassceramic formation.…”

The Ndop plain clayey materials (Bamenda area – NW Cameroon): Mineralogical, geochemical, physical characteristics and properties of their fired products

“…The specified values of water absorption (WA) and mechanical resistance ( ) for kaolinitic materials [44] are: dense bricks (WA < 25% and ≥ 2.0 MPa), ceramic blocks (WA < 25% and ≥ 5.5 MPa) and roofing tiles (WA < 20% and ≥ 6.5 MPa). Low flexural strength values disqualify the raw material for ceramic uses [45]. The results show that dense brick and ceramic block specifications were achieved up to 1000 • C, while roofing tile specifications are attained only at 1100 • C for all mixtures.…”

Efeito da temperatura de queima em algumas propriedades mecânicas de cerâmica vermelha

“…Existe extensa literatura sobre as características e propriedades tecnológicas de argilas brasileiras usadas na fabricação de cerâmica vermelha [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Verifica-se que na maioria dos trabalhos se busca basicamente determinar se uma determinada matéria-prima argilosa está apta ou não para fabricação de cerâmica vermelha para construção civil.…”