Avaliação da influência do glicerol em matriz cerâmica

Abstract

RESUMO O presente trabalho avalia os efeitos da adição de glicerol sobre a porosidade e resistência mecânica de um material cerâmico. As amostras foram compactadas por prensagem uniaxial e submetidas a temperaturas de queima de 950 °C e 1100 °C, com taxa de aquecimento de 7 °C min-1. Foram realizados ensaios físicos e mecânicos para analisar porosidade aparente, absorção de água, retração linear e resistência mecânica a flexão. Os resultados mostram que a adição de 10% de glicerol à argila melhora principalmente suas propriedades mecânicas, podendo ser um aditivo promissor para gerar materiais cerâmicos estruturais com microestrutura mais resistente.

Evaluation of the potential use of granite waste in products of the red ceramic industry in the state of Amazonas

“…Therefore, indicating the possible presence of primary minerals (quartz, feldspar and mica group minerals) [24]. the result found is in agreement with the results found in previous researches [42,43,49]. The clay showed high compositions of SiO 2 and Al 2 O 3 .…”

“…The muscovite and albite phases, present in the residue, present in their composition the element sodium (Na), which are not present in the chemical investigation, this can be explained by the limited precision of the XRF technique in detecting the element sodium [38]. These phases, as well as the microcline stage, are desirable as they assist in the formation of a glassy matrix and linear shrinkage during sintering [43,44]. Therefore, both samples showed a high content of quartz and considerable phases present in the residue that present fusion characteristics in sintering, which may contribute to the optimization of the firing cycle.…”

“…Despite the great importance of this sector for the country's economic development, there is an increasing need for the main raw material of the red ceramic industry, clay, in which its exploration is simultaneously intensified and, consequently, increasing environmental impacts [2]. In this way, researchers sought solutions that would reduce damage to the environment, such as the incorporation of industrial waste in the clay matrix [3,4,42,43] The red ceramic industry represents 4.8% of the civil construction industry in Brazil, comprising 6903 companies that generate an equivalent to R$ 18 billion in annual sales [5]. According to data from the Ministry of Mines and Energy, the main products developed in the North are bricks and blocks [6].…”