The present invention provides inorganic pigments including cobalt and aluminum having the spinel crystalline structure that exhibit improved color and/or weatherability in paint and polymer applications. Inorganic pigments according to the invention are formed by adding small quantities of a phosphate compound such as aluminum phosphate and, optionally, chromium (III) oxide, to a raw batch that includes a mixture of cobalt-containing and aluminum-containing inorganic pigment precursors, and cal...

A fabric is formed from yarn comprised of inorganic filaments coated with rayon. Specifically, the inorganic filaments are spun from a melt of volcanic black rock and are comprised of calcium oxide, magnesium oxide, potassium oxide, aluminum oxide, iron oxide, silicon dioxide, titanium dioxide, sodium oxide, and boron. As a result of its composition, the fabric is temperature resistant and lightweight, yet strong. Preferably, the fabric exhibits a melting point between 1500.degree. C. and 1650.d...

The present invention provides an inorganic scintillator including a matrix material comprising a metal oxide, and a luminescence center made of Ce contained in the matrix material, the inorganic scintillator being adapted to scintillate in response to a radiation; wherein the matrix material further comprises a dopant having a tetravalent ionization energy I [kJmol.sup.-1] satisfying the condition represented by the following expression (1): 3000.ltoreq.I.ltoreq.3500. (1)

The inorganic scintillator of the invention is an inorganic scintillator capable of producing scintillation by radiation, which is a crystal comprising a metal oxide containing Lu, Gd, Ce and Si and belonging to space group C2/c monoclinic crystals, and which simultaneously satisfies the conditions specified by the following inequalities (1) and (2). {A.sub.Lu/(A.sub.Lu+A.sub.Gd)}<0.50 (1) {A.sub.Ce/(A.sub.Lu+A.sub.Gd)}.gtoreq.0.002 (2) wherein A.sub.Lu represents the number of Lu atoms in th...

An inorganic pigment, the pigment comprising a compound which is an oxysulphide or oxyselenide of tin and a metal chosen from niobium or tantalum. The pigments are brightly colored in the color range from yellow, through orange to red, and are especially suitable for the coloration of glass and plastic substrates. Methods for the production of the pigments are also described.

The present invention provides an inorganic composition for use in information recording medium disc substrate and such, having an excellent surface property capable of sufficiently corresponding with a ramp load system for high density recording, a high degree of tolerability to high speed rotation, and high productivity at a low melting point. Specifically, this invention provides an inorganic composition containing one crystalline phase selected from the group consisting of .alpha.-quartz (.a...

A process for preparing microporous inorganic membranes comprising mixing a sol comprised of inorganic colloidal particles dispersed in a liquid medium with an organic polymeric film forming material dissolved in a suitable solvent. The liquid medium of the sol, the organic polymeric film forming material, and the solvent being selected such that: (1) the liquid medium of the sol and the solvent are miscible, (2) the organic polymeric film forming material is soluble in the solvent and (3) the o...

Inorganic adhesives suitable for bonding metals to metals, metals to ceramics, or ceramics to ceramics with high bonding strength are disclosed, which contain a composite mechanical alloy powder comprising: (a) from about 10 to 60 wt % of particles of at least one of Cu and Ni; (b) from about 10 to 80 wt % of particles of at least one of Ti, Nb, and Zr; and (c) from about 10 to 80 wt % of Ag particles. The composite powder can be dispersed in an organic solvent to form a paste adhesive.

An inorganic composition which is capable of forming a coating film or adherent layer excellent in water resistance, weatherability, heat resistance, chemical resistance, adhesion, surface smoothness, hardness and gloss and which consists essentially of (A) a calcined borate-type mixture obtained by calcining at a temperature of about 300.degree. to about 1,500.degree. C a mixture comprising (i)(a) a borate of a metallic element of Groups II to VIII of the Periodic Table or (i)(b) at least one b...

The present invention is a method for manufacturing inorganic membranes which are capable of separating oxygen from oxygen-containing gaseous mixtures. The membranes comprise a porous composite of a thin layer of a multicomponent metallic oxide which has been deposited onto a porous support wherein the pores of the multicomponent metallic oxide layer are subsequently filled or plugged with a metallic-based species. The inorganic membranes are formed by depositing a porous multicomponent metallic...