A slurry or slip composed of a dispersion medium and a dispersoid including sinterable raw material powder containing a complex oxide powder represented by the following formula (1):
(Tb.sub.1-x-yR.sub.xSc.sub.y).sub.3(Al.sub.1-zSc.sub.z).sub.5O.sub.12  (1)
wherein R is yttrium and/or lutetium, 0.05≤x<0.45, 0<y<0.1, 0.5<1-x-y<0.95, and 0.004<z<0.2 is prepared; the slurry or slip is subsequently enclosed in a mold container to be subjected to solid-liquid separation by centrifugal casting to mold a cast compact; the cast compact is dried thereafter; a dried compact is degreased; a degreased compact is sintered thereafter; and a sintered body is further subjected to a hot isostatic pressing treatment to obtain the transparent ceramic material composed of the sintered body of garnet-type rare earth complex oxide represented by the formula (1).

Disclosed is a method of fabricating a construction element. The method may include assembling a mold on a rotational casting machine; rotating the mold around at least two axes at a predetermined speed; providing a first portion of magnesium silico-phosphate cement (MSPC) mix, having an altered hardening rate, to the mold while rotating the mold until at least a portion of the molds walls is covered by a first layer of the MSPC mix; and rotating the mold until the MSPC mix is hardened to a predetermined degree.

Disclosed is a method of fabricating a construction element. The method may include assembling a mold on a rotational casting machine; rotating the mold around at least two axes at a predetermined speed; providing a first portion of magnesium silico-phosphate cement (MSPC) mix, having an altered hardening rate, to the mold while rotating the mold until at least a portion of the molds walls is covered by a first layer of the MSPC mix; and rotating the mold until the MSPC mix is hardened to a predetermined degree.

A method of impregnating a fiber texture of hollow shape, the method including introducing a first suspension containing a first powder of solid particles of ceramic or carbon material into an inside volume defined by an inside face of a fiber texture of hollow shape placed in a mold, an outer face of the fiber texture being presented facing a wall of the mold; and using the action of centrifugal force to impregnate the fiber texture with the first suspension by causing the mold to rotate and varying the speed of rotation of the mold during the impregnation of the texture with the first suspension.

A method of impregnating a fiber texture of hollow shape, the method including introducing a first suspension containing a first powder of solid particles of ceramic or carbon material into an inside volume defined by an inside face of a fiber texture of hollow shape placed in a mold, an outer face of the fiber texture being presented facing a wall of the mold; and using the action of centrifugal force to impregnate the fiber texture with the first suspension by causing the mold to rotate and varying the speed of rotation of the mold during the impregnation of the texture with the first suspension.

A spin caster for spraying a surfacing material upon an interior surface of a vessel includes a spin head configured to rotate about an axis, the spin head including an input port, and a supply line coupled to the input port and configured to convey a first material to the spin head and a second material to the spin head. The supply line comprises a first channel configured to convey the first material to the spin head and a second, different channel configured to convey the second material to the spin head.

A spin caster for spraying a surfacing material upon an interior surface of a vessel includes a spin head configured to rotate about an axis, the spin head including an input port, and a supply line coupled to the input port and configured to convey a first material to the spin head and a second material to the spin head. The supply line comprises a first channel configured to convey the first material to the spin head and a second, different channel configured to convey the second material to the spin head.

A method of manufacturing geopolymer tubes comprises forming a geopolymer composition comprised of an aluminosilicate source and an alkali activator, wherein the geopolymer composition has a fluid consistency and a shear thinning index of greater than 1.05, transferring the geopolymer composition into a tubular mold, rotating the mold to shear and distribute the composition onto the inner wall of the mold until the geopolymer composition reaches non-flowable consistency, and curing the geopolymer in the mold to form geopolymer tubes. A method for making geopolymer tubes with the disclosed geopolymer composition comprises shearing the geopolymer composition in a tubular mold at a high rotational speed to significantly reduce apparent viscosity to form the tubular shape, at least in the initial process stage. A ceramic tube made from the geopolymer composition of the present invention is used as a membrane or adsorbent for filtration applications.

A method of manufacturing geopolymer tubes comprises forming a geopolymer composition comprised of an aluminosilicate source and an alkali activator, wherein the geopolymer composition has a fluid consistency and a shear thinning index of greater than 1.05, transferring the geopolymer composition into a tubular mold, rotating the mold to shear and distribute the composition onto the inner wall of the mold until the geopolymer composition reaches non-flowable consistency, and curing the geopolymer in the mold to form geopolymer tubes. A method for making geopolymer tubes with the disclosed geopolymer composition comprises shearing the geopolymer composition in a tubular mold at a high rotational speed to significantly reduce apparent viscosity to form the tubular shape, at least in the initial process stage. A ceramic tube made from the geopolymer composition of the present invention is used as a membrane or adsorbent for filtration applications.

A method of fabricating an impregnated fiber assembly, the method including introducing a first suspension including a first powder of solid particles into an inside volume defined by an inside face of a first fiber texture of hollow shape placed in a mold, an outer face of the first fiber texture being present facing a wall of the mold; using a centrifugal force to impregnate the first fiber texture with the first suspension by rotating the mold; after impregnating the first texture, positioning a second fiber texture on the inside face of the first fiber texture to obtain a fiber assembly; introducing a second suspension including a second powder of solid particles into the inside volume after putting the second fiber texture into position; and using a centrifugal force to impregnate the second fiber texture with the second suspension by rotating the mold to obtain an impregnated fiber assembly.