An electrical steel sheet (1) includes a base material (2) of electrical steel, and an insulating film (3) formed on a surface of the base material (2), the insulating film (3) containing a polyvalent metal phosphate and Fe. A maximum value of a parameter Q expressed by Q=C.sub.FeO/C.sub.P is equal to or less than 1.3 times and equal to or more than 1.09 times an average value of the parameter Q in a region from a first depth from a surface of the insulating film to a second depth, C.sub.FeO denoting a proportion (atom %) of Fe bonded to O relative to all elements, and C.sub.P denoting a proportion (atom %) of P relative to all elements. The first depth is 20 nm from the surface, and the second depth is a depth where the proportion of P is equal to a proportion of metal Fe.

An electrical steel sheet (1) includes a base material (2) of electrical steel, and an insulating film (3) formed on a surface of the base material (2), the insulating film (3) containing a polyvalent metal phosphate and Fe. A maximum value of a parameter Q expressed by Q=C.sub.FeO/C.sub.P is equal to or less than 1.3 times and equal to or more than 1.09 times an average value of the parameter Q in a region from a first depth from a surface of the insulating film to a second depth, C.sub.FeO denoting a proportion (atom %) of Fe bonded to O relative to all elements, and C.sub.P denoting a proportion (atom %) of P relative to all elements. The first depth is 20 nm from the surface, and the second depth is a depth where the proportion of P is equal to a proportion of metal Fe.

The invention is a system and method for building a polar zonohedron structure from precast cement panels. The building system may include a plurality of panels configured to register with each other. Each panel includes a precast cement base with side walls enclosing a cavity within the precast cement base. The panels include at least one ridge protruding from at least one surface of a side wall of the panel and at least one aperture on at least one surface of a side wall of the panel. Each ridge is preferable configured to interlock with each aperture; in his way, the panels interlock with each other to form the polar zonohedron structure.

The present invention provides curable calcium phosphate dental cement that has excellent sealability for dentinal tubule, is expected to form fluoroapatite, and has a curing time that is advantageous for clinical use. The present invention is directed to curable calcium phosphate dental cement including: a first material as powder or nonaqueous paste; and a second material as liquid or aqueous paste, and, in the curable calcium phosphate dental cement, the first material comprises tetracalcium phosphate (A), alkali metal salt of phosphoric acid (B), and acidic calcium phosphate (C), the second material comprises water (D), and at least one of the first material and the second material comprises a fluorine compound (E) and an organic acid (F) having a molecular weight of 10000 or less.

A dry composition formulated to be combined with water to form a jamb spray mix, the dry composition comprising, by weight: 0.1% to 10% phosphate by weight based on total weight of the dry composition; 5% to 15% plasticizer by weight based on total weight of the dry composition; and the balance including fused silica particles and impurities.

A dry composition formulated to be combined with water to form a jamb spray mix, the dry composition comprising, by weight: 0.1% to 10% phosphate by weight based on total weight of the dry composition; 5% to 15% plasticizer by weight based on total weight of the dry composition; and the balance including fused silica particles and impurities.

A jamb spray mix comprising: 0.1% to 10% phosphate by weight based on total weight of dry ingredients in the mix, 5% to 15% plasticizer by weight based on total weight of dry ingredients in the mix, the balance of dry ingredients including fused silica particles and impurities, and at least 20% water by weight based on total weight of the mix. In certain non-limiting embodiments, a coating of the jamb spray mix is applied to a refractory brick surface region in a coke oven using an air pressurized applicator and associated nozzle.

A jamb spray mix comprising: 0.1% to 10% phosphate by weight based on total weight of dry ingredients in the mix, 5% to 15% plasticizer by weight based on total weight of dry ingredients in the mix, the balance of dry ingredients including fused silica particles and impurities, and at least 20% water by weight based on total weight of the mix. In certain non-limiting embodiments, a coating of the jamb spray mix is applied to a refractory brick surface region in a coke oven using an air pressurized applicator and associated nozzle.

The present disclosure is directed to a bioresorbable ceramic composition having a plurality of biocompatible ceramic granules, each of the granules having a coating of a plurality of calcium containing particles, where at least a portion of the particles are bound to at least a portion of an outer surface of each of the granules, and further where the composition is flowable in a dry state. The present disclosure is also directed to a three dimensional scaffold for bone repair that includes the bioresorbable composition, which upon implantation to a locus of repair defines an interconnected pore network between outer walls of the coated granules of the composition. Finally, the present disclosure is directed to methods of forming both the bioresorbable ceramic composition and the three-dimensional ceramic scaffold.

Corrosion-resistant refractory binder compositions may include high alumina cement, high-alumina refractory aluminosilicate material, and phosphorous material. Examples of high-alumina refractory aluminosilicate material include crushed firebrick, firebrick grog, refractory mortar, fire clay, mullite, fused mullite, and combinations thereof. The binder composition may be mixed with sufficient amount of fluid such as water to form a slurry and introduced into a wellbore penetrating a subterranean formation, where it may be allowed to set at a point downhole. Such compositions, once set, may exhibit enhanced corrosion and heat resistance. Such compositions, once set, may additionally be cured. Curing may take place at higher temperatures and/or pressures, and may furthermore increase temperature resistance and/or strength of the set binder composition. In addition, the inclusion of high-alumina refractory aluminosilicate material may provide for enhanced consistency in such binder compositions formulated from different batches of high-alumina refractory aluminosilicate material.