Porcelain Chemical Composition
Low thermal expansion, excellent mechanical strength, and strong chemical resistance are characteristics of porcelain. The raw ingredients comprise kaolin, quartz, calcined alumina, and perhaps small amounts of additional substances such as
- Silica (Quartz): Like gravel in concrete, it offers an aggregate framework for the fired matrix.
- Clay: Gives wet materials fluidity and drying hardness, and during firing, it changes into a mesh of crystals (which gives porcelain its strength).
- Feldspar with Nepheline Syenite: As the feldspar melts, part of the silica and kaolin grains dissolve and are filled in, forming a solid mass.
Steatite Chemical Composition
63.37% silica, 31.88% magnesia, and 4.74% water make up the majority of pure steatite. Smaller amounts of various other oxides, such as CaO or Al2O3, are typically present. The parent rock type and the metamorphic climate's temperature/pressure conditions both affect the composition of the rock.
As a result, Steatite's physical characteristics might vary geographically or even within the same rock block. The majority of it is talc, with minute amounts of iron-chromium oxide, chlorite, and amphiboles (usually tremolite, anthophyllite, and cummingtonite). It could be schistose or enormous. It is created through the metamorphism of siliceous dolomites and ultramafic protoliths (like dunite or serpentinite).
High-Alumina Chemical Composition
High-alumina is a high-tech ceramic material with alumina (Al2O3) as its primary chemical component that finds widespread application in both conventional and emerging material industries. Alumina ceramics are often defined as having an alumina concentration of more than 70%. It is a common electronic ceramic material as well as a traditional refractory and wear-resistant substance.
High-alumina has high chemical stability, is half the density of steel, and doesn't chemically react with many complicated sulfides. Because of the Alumina's exceptional mechanical and flexural strength, which can be maintained even at 900°C, it is perfect for hot-pressing to create Alumina Ceramics.
