The invention relates to a composition (batch) for producing a shaped refractory ceramic product, a method for producing a shaped refractory ceramic product, and a shaped refractory ceramic product.

A sintered ferrite magnet comprising metal elements of Ca, La, Fe and Co, whose atomic ratios are represented by the general formula of Ca.sub.1-xLa.sub.xFe.sub.2n-yCo.sub.y, wherein x and y, and n representing a molar ratio meet 0.3x0.6, 0.25y0.5, and 3n6, and further comprising 0.2% to 0.35% by mass of SiO.sub.2.

Organosilicon chemistry, polymer derived ceramic materials, and methods. Such materials and methods for making polysilocarb (SiOC) and Silicon Carbide (SiC) materials having 3-nines, 4-nines, 6-nines and greater purity. Processes for making SiC boules and SiC wafers utilizing such high purity SiOC and SiC.

Organosilicon chemistry, polymer derived ceramic materials, and methods. Such materials and methods for making polysilocarb (SiOC) and Silicon Carbide (SiC) materials having 3-nines, 4-nines, 6-nines and greater purity. Processes and articles utilizing such high purity SiOC and SiC.

Fused cast refractory product including, as weight percentages on the basis of the oxides and for a total of 100%: ZrO.sub.2: balance to 100%, Hf.sub.2O: <5%, SiO.sub.2: 8.1% to 12.0%, B.sub.2O.sub.3: 0.20% to 0.90%, Na.sub.2O+K.sub.2O: 0.40% to 0.80%, Al.sub.2O.sub.3: 0.3% to 2.0%, Y.sub.2O.sub.3: <2.0%, Fe.sub.2O.sub.3+TiO.sub.2: <0.6%, and other species: <1.5%.