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Kaolin (china clay)
A refractory clay consisting essentially of minerals of the kaolin group and which fires to a white or nearly white color.

Kyanite
The most abundant of the mineral polymorphs that include andalusite and sillimanite. Kyanite is used as a source of mullite in ceramics.

Knockings
The oversize residue obtained in screening a ceramic slip. (ASTM C 242).

Keene's cement
A cement composed of finely ground, anhydrous, calcined gypsum, the set of which is accelerated by the addition of other materials.

شركت صنعتي - معدني همدي توس بهره بردار معادن كائولين همدي و مكان آباد است. شركت همدي توس يك شركت تخصصي معدني در زمينه توليد مواد اوليه صنايع سراميك است كه دست اندركاران آن در رشته هاي مهندسي معدن _ سراميك و زمين شناسي تحصيل كرده اند.

Al₂O₃Alumina has a very high melting temperature and alumina ceramics can maintain up to 90% of their strength above 1100C. They are thus employed in many refractory materials (i.e. Calcium Aluminate Cements have PCEs above cone 35) and used to make parts that must withstand high temperature.

CaO
Calcium oxide is the principle flux in medium and high temperature glazes, beginning its action around 1100C. It must be used with care in high-fire bodies because its active fluxing action can produce a body that is too volatile (melting if slightly overfired).

SiO₂
The principle, and often only glass forming oxide in glaze. Normally comprises more than 60% of most glazes and 70% of clays. Special purpose formulations which lack silica often compromise structural stability and strength.