Novel mullite‐cordierite ceramic refractory fabricated from halloysite and talc

Abstract

In industry, the refractory materials, generally resistant to high temperatures (>1500°C), are considered of great importance for thermal insulation and for the manufacture of furnaces. Fired bricks or unshaped materials (monolithic materials) are usually used for applications involving high temperatures in corrosive conditions (such as the presence of oxidizing or reducing agents), including the ceramic industry, iron and steel industry, non-ferrous metallurgy, petrochemical, cement and glass industry, incinerators, and energy production. The new feature requirements taking into consideration the working environments for better performance and lower production cost of the raw materials, are considered the main focus of numerous recent studies. The essential category of traditional refractory products is fireclay, with a high content of Alumina and Silica. The choice of material for traditional refractory and advanced materials' applications has been carried out based on the optimization between cost, quality and performance taking into consideration the working environments. Kaolin, the basic raw material for the production of Silica-Alumina refractories, is derived from the hydrothermal alteration of alkaline Granite which causes the kaolinization of alkali-feldspar of Granite rock and produces a friable aluminous material 1 : Feldspar Kaolin. This research work contributes to the development of local natural resources and to prospect the potentialities of 6SiO 2 2 O 3 K 2 O + 2H 2 O + CO 2 → 2SiO 2 2 O 3 2H 2 O + 4SiO 2 + K 2 CO 3

X-Ray Peak Profile Analysis of Materials M1 and M2 by Williamson-Hall and Size-Strain Plot Methods

“…From 900℃ the metaKaolin dissociates giving in particular unstable amorphous silica [23], which. will react at higher temperatures, according to three reactions: one part with γ alumina [23][24][25] to give the 3Al2O32SiO2 mullite, another part will crystallize into β cristobalite, finally the remaining amorphous silica will react with the impurities metal oxides to give vitreous phases of varying compositions.…”

Halloysite in Different Ceramic Products: A Review

“…Recently, Cheraitia et al [ 58 ] developed cost effective mullite–cordierite refractories from kaolin, fireclay and talc raw materials. They studied the substitution of the French imported kaolinite-rich clay material with the local halloysite-rich clay with higher aluminum in the refractory production.…”

Mullite-Based Ceramics from Mining Waste: A Review

“…All these features currently make mullite to be, probably, one of the most important phases in traditional and advanced ceramic. Monolithic mullite ceramics find application in tableware [48], porcelain stoneware [49,50], refractory [51] or electronic devices [52]. Mullite coatings have been used successfully as environmental barrier coatings for the protection against oxidizing agents, reducing agents or aggressive chemicals at high temperatures [53,54].…”