Lithium Feldspar Ceramics

Imerys ceramics as the leader in industrial minerals has unmatched mineralogical knowledge and can assist customers in ensuring that the proportions of feldspar in the body recipe are exactly right to avoid over vitrification during firing.

Lithium feldspar ceramics. It is used in ceramics as a source of lithia. Lithium feldspars such as spodumene and petalite. The following table presents typical chemical analyses in weight percent provided by the suppliers for a number of common feldspar products and related. Feldspar pegmatite can play vital roles during firing as they are used as the main vitrifying or fluxing agent in ceramic bodies.

Crackle glaze crackle glazes are used on decorative ceramic ware. They have a crack pattern that is a product of thermal expansion mismatch between body and. Feldspar is a family run design brand creating timeless handmade homewares from our workshop in rural devon. Thus it is common to see alot of it in glaze recipes.

Sustainably handcrafted in the uk cherished around the world. It is valuable because it provides an insoluble source of lithium lithium carbonate is soluble and has the highest li 2 o al 2 o 3 ratio of any natural mineral. We make objects for life useful everyday items intended to be treasured. When fired to cone 8 on porcelain there was some crazing within an opaque matte finish.

Feldspars used in ceramic glazes and clay making. But they are aluminosilicates like feldspars and contain the fluxing element lithium and are used for the same purposes as the feldspars. Stains mason harshaw pembco ferro etc. The lithium fluxes include.

Lithia is a very powerful flux especially when used in conjunction with potash and. Spodumene li2o al2o3 4sio2 lithium feldspar powerful ht alkaline flux promotes copper blues good for thermal shock bodies and matching glazes. With the addition of 3 lico 3 in lithium a or 21 spodumene in lithium b the result is very similar in surface and color but without crazing. Spodumene is a silicate mineral often referred to as lithium feldspar.

Petalite is a lithium aluminum silicate mineral more simply a lithium feldspar that is commonly used in clay bodies. Feldspar is a natural mineral that by itself is the most similar to a high temperature stoneware glaze. Its mineral form is characterized by hard needle like grains of brilliant white color. Lithium is a strong alkaline flux and is effective over all temperature ranges.

The preferred source of lithium for crystal growth. Lithium is used both for fluxing and for encouraging crystal growth in crystalline glazes.