초록 ▼

A mullite containing cementing mix particularly suited for silicon carbide containing shapes is shown that is adapted to be initially activated when mixed with water and set by air drying so that it can subsequently permanently set by firing the mortar in situ. The mullite component is first mixed i

A mullite containing cementing mix particularly suited for silicon carbide containing shapes is shown that is adapted to be initially activated when mixed with water and set by air drying so that it can subsequently permanently set by firing the mortar in situ. The mullite component is first mixed in a raw batch with ball clay, a chemically active alumina, bentonite, sodium silicate and a borosilicate glass frit and then after this composition is mixed with water and air dried, the cement is fired in place to react certain of the constituents in the mix and sinter the mullite phase in a bonded relation with the surface of the shapes being cemented in place. A refractory furnace liner or the like may thus be fabricated for example wherein the silicon carbide containing shapes forming the liner are held in place with an inert strongly adhering cement having substantially the same thermal expansion properties as the shapes being bonded.

대표청구항 ▼

A raw batch adapted to be mixed with water to form a mortar adapted to be dried and then fired in situ particularly for use with silicon carbide containing elements including silicon carbide shapes bonded with oxides, silicon nitride or silicon oxynitride comprising a mixture of from 70% to 90% by w

A raw batch adapted to be mixed with water to form a mortar adapted to be dried and then fired in situ particularly for use with silicon carbide containing elements including silicon carbide shapes bonded with oxides, silicon nitride or silicon oxynitride comprising a mixture of from 70% to 90% by weight of a calcined refractory mullite grain containing 70% alumina, from 2% to 7% by weight of a ball clay, from 2% to 10% by weight of a finely ground chemically active alumina, from 1% to 4% by weight of a purified bentonite, from 0.5% to 1.5% by weight of sodium silicate, and from 5% to 15% by weight of a glass frit. A raw batch adapted to be mixed with water to form a mortar adapted to be dried and then fired in situ particularly for use with silicon carbide containing elements including silicon carbide shapes bonded with oxides, silicon nitride or silicon oxynitride comprising a mixture of from 70% to 90% by weight of a calcined refractory zircon grain, from 2% to 7% by weight of a ball clay, from 2% to 10% by weight of a finely ground chemically active alumina, from 1% to 4% by weight of a purified bentonite, from 0.5 to 1.5% by weight of sodium silicate, and from 5% to 15% by weight of a glass frit.