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 mold's 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.

An article and method for spreading a substance about a surface is disclosed. The article includes a hollow, frangible shell having an opening. The shell is filled with a substance and a plug closes. A user throws the article at the surface where the substance is desired to be spread. Upon impact, the shell shatters scattering the substance.

An article and method for spreading a substance about a surface is disclosed. The article includes a hollow, frangible shell having an opening. The shell is filled with a substance and a plug closes. A user throws the article at the surface where the substance is desired to be spread. Upon impact, the shell shatters scattering the substance.

A refractory composition is formed by preparing a set retarded fresh cementitious composition formed from a class C fly ash, a set retardant such as boric acid, and an alkali activator such as an alkali metal citrate salt, and contacting the set-retarded fresh cementitious composition with a pH regulator, such as an alkali metal hydroxide or alkali metal carbonate. The set retarded mixture provides workability and avoids equipment fouling caused by premature setting, while the alkali activator provides rapid setting when desired. The cementitious composition is shaped into a brick, panel, slab, concrete fire log, or the like and allowed to harden. The hardened cementitious composition can be heated to form a dried cementitious composition, and further heated to produce a high strength refractory composition. Fibers and/or aggregates may be included.

A refractory composition is formed by preparing a set retarded fresh cementitious composition formed from a class C fly ash, a set retardant such as boric acid, and an alkali activator such as an alkali metal citrate salt, and contacting the set-retarded fresh cementitious composition with a pH regulator, such as an alkali metal hydroxide or alkali metal carbonate. The set retarded mixture provides workability and avoids equipment fouling caused by premature setting, while the alkali activator provides rapid setting when desired. The cementitious composition is shaped into a brick, panel, slab, concrete fire log, or the like and allowed to harden. The hardened cementitious composition can be heated to form a dried cementitious composition, and further heated to produce a high strength refractory composition. Fibers and/or aggregates may be included.

A method for manufacturing a structure having at least one microscale feature includes mixing a powdered material with a binder to yield a slurry, shaping the slurry to yield a green device, and sintering the green device to yield the structure.

A method for manufacturing a structure having at least one microscale feature includes mixing a powdered material with a binder to yield a slurry, shaping the slurry to yield a green device, and sintering the green device to yield the structure.

Disclosed herein is a rotational craft tool including a housing, a motor included in the housing, a turntable assembly, and a battery included in the housing to provide power to the motor to rotate the turntable assembly.

Disclosed herein is a rotational craft tool including a housing, a motor included in the housing, a turntable assembly, and a battery included in the housing to provide power to the motor to rotate the turntable assembly.

A thermistor sintered body has a thickness in a range of 1 m to 100 m and an area in a range of 1 mm.sup.2 to 10 mm.sup.2, and is composed of a single body of a sintered body having a composition of NiMn.sub.2O.sub.4. This thermistor sintered body can be manufactured by a first step of dropping a raw material liquid RL onto a surface of a substrate rotatably supported, a second step of rotating the substrate with the dropped raw material liquid RL and spreading the raw material liquid RL, a third step of forming a sintered body having the composition of NiMn.sub.2O.sub.4 on the surface of the substrate by heating and holding the raw material liquid RL and the substrate on which the raw material liquid RL has been placed, and a fourth step of separating the sintered body from the substrate.