The objective of this work is to obtain a multifunctional ceramic composite material at low cost with improved properties and that can be used in many structural applications like: electrical, refractory support tribological elements. A mullite-alumina were prepared by using Algerian kaolin amorphous aluminum hydroxide as starting materials. Two mixtures varying the content 61.5% 50 wt %. an ab...

The cavity wall is an important part of a receiver in determining the efficiency. Using solar selective reflector (SSR) materials with low absorptivity and high thermal emissivity for design one efficient way to improve In this work, we present systematic study optical high-temperature stability performances six different SSR materials: refractory ceramic fiber based substrate material (Fiberfr...

Mineralogical and chemical analyses of three textural varieties of pyrophyllite samples collected from Baliadihi mine of Keonjhar district, Orissa, India are investigated. Mineralogically they consist of quartz, pyrophyllite, altered feldspar as major minerals and muscovite, chlorite, tourmaline, hematite etc. as minor minerals. The samples exhibit compositional variation of SiO2 65.56 71.66%, ...

Applications of ceramic materials usually involve thermal stresses that can reduce their lifetime considerably. One of the most relevant mechanical properties for evaluating thermal shock damage resistance is the energy of fracture. In order to obtain this property, a stable crack growth regimen must be achieved throughout the test. In this paper, three-point bending tests are analyzed to deter...

In this study, degradation by so-called “Obake” , an advanced stage of external corundum growth on alumina-silica refractory surfaces, was investigated. The Obake successfully recreated melting Al-5%Mg in the crucible under thermal cycle conditions. test temperatures were chosen at 1000°C or 1150°C. It confirmed that internal occurred formation spinel (MgAl2O4) where touch with molten Al-5Mg an...

Despite the continuous evolution on performance of refractory ceramic products, monolithic materials still require special attention during their processing steps as various phase transformations may take place curing, drying and firing stages. Drying is usually longest most critical process observed first heating cycle linings, enhanced particle packing reduced permeability resulting microstru...