"Preparation and Characterization of Layered Double Hydroxides from Some Waste Materials for Ceramic Applications"

Abstract

Recently, layered double hydroxides (LDHs) or Hydrotalcite-like compounds (HTCs), have paid considerable attention due to their layered structure and high anion-exchange capacity [Bellotto et al., 1996]. They consider as hydroxy-carbonate of Mg and Al (natural and synthetic) under the class anionic clays. Their applications for ceramic are leading to interested class called spinel ceramics which have a huge number of applications starting from engineering structural materials and refractory materials to electronics and medical applications etc. [De Roy et al., 1992; Trifió et al., 1996; Rives, 2001; Braterman et al., 2004]. LDHs are structurally similar to brucite, Mg(OH)2 or to naturally occurring hydrotalcite clay, which has chemical formula of [Mg6Al2(OH)16CO3•4H2O] [Richardson, 2007]. So, LDHs are often known as hydrotalcite-like compounds [Mousty and Leroux, 2012; Wang and O'Hare, 2012; Leuteritz et al., 2012; Züemreoglu-Karan and Ay, 2012; Jensen, 2015].