A composition of matter and method of forming a radiation shielding member at ambient temperatures in which the composition of matter includes a cold-fired chemically bonded oxide-phosphate ceramic cement matrix; with one or more suitably prepared and distributed radiation shielding materials dispersed in the cold-fired chemically bonded oxide-phosphate ceramic cement matrix.

This invention has an object to provide a means for providing a calcium phosphate sintered body particle group that does not cause a phenomenon of bubble generation in any use mode thereof, and further has a smaller particle diameter.

There is provided a ceramic particle group containing spherical ceramic particles, which is characterized in that the ceramic particle has a particle diameter within a range of 10 nm to 700 nm, and is a calcium phosphate sintered body particle, and further the ceramic particle group contains no calcium carbonate.

Disclosed are embodiments of a multi-phase ceramic material which can have advantageous properties as a thermal barrier coating. In particular, embodiments of the ceramic can have high fracture toughness as well as calcium, magnesium, and aluminum silicate corrosion resistance. The improved properties of the ceramic can make the material applicable as a coating on turbines, such as airplane and industrial turbines.

A dielectric ceramic composition having good properties, particularly good IR property and high temperature accelerated lifetime, even under high electric field intensity. A dielectric ceramic composition having a main component made of a perovskite type compound expressed by a compositional formula of (Ba1-x-ySrxCay)m(Ti1-zZrz)O3 (note that, m, x, y, and z of the above compositional formula all represent molar ratios, and each satisfies 0.9<m<1.1, 0<x<0.5, 0<y<0.3, 0<(x+y)<0.6, and 0.03<z<0.3), and a first sub component made of an oxide of a rare earth element R (note that, R is at least one selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu), wherein the dielectric ceramic composition includes dielectric particles and a particle boundary.

To provide a technology for sintering calcium phosphate to manufacture a calcium phosphate sintered body and suppressing generation of calcium oxide when calcium phosphate is sintered, there is provided a process for manufacturing a sintered calcium phosphate molded body is characterized by including a step for heating a composition containing at least a composite of calcium phosphate fine particles and polyether and sintering the calcium phosphate fine particles.

The invention relates to a ceramic composition and a material comprising said ceramic composition in the form of a coating and a steel substrate. Furthermore, the invention relates to the process to obtain said material and its use as part of a heat recovery unit.

A composition for preparing a rigidified fabric made of heat resistant fibers or threads of heat resistant fibers, preferably of woven threads made of heat resistant fibers, said composition comprising a mixture of a product A and a product B, the product A being obtained by polymerization of carbohydrate units, natural or synthetic, preferably a saccharide, and more preferably a sugar such as glucose, fructose, galactose, sucrose, maltose, lactose, etc.; and the product B consisting of at least one additive such as a binding agent. A method for preparing said composition, a method for preparing a rigidified fabric of heat resistant fibers, the method for the manufacture of filtering devices, filtering devices so obtained, their use for the filtering of metal, and installation and process involving said filtering devices.

The present invention provides a method of additive manufacturing a 3D-printed article, comprising: (a) printing and depositing one or more layers of a slurry by using a 3D printer, wherein the slurry comprises a ceramic powder composition; (b) further injecting an oil around the one or more layers of slurry, wherein the height of the injected oil is lower than the height of the slurry; (c) repeating steps (a) and (b) until a main body with desired geometric shape is obtained; and (d) sintering the main body by heating to obtain the 3D-printed article wherein the temperature of a printing carrier of the 3D printer is from 30 to 80 C.

A Zr-based composite ceramic material, a preparation method thereof, and a shell or decoration are provided. The Zr-based composite ceramic material includes a zirconia matrix, a cubic Sr.sub.0.82NbO.sub.3 stable phase, a Ca.sub.10(PO.sub.4).sub.6(OH).sub.2 phase, and a SrAl.sub.12O.sub.19 phase, and the cubic Sr.sub.0.82NbO.sub.3 stable phase, the Ca.sub.10(PO.sub.4).sub.6(OH).sub.2 phase and the SrAl.sub.12O.sub.19 phase are dispersed within the zirconia matrix.

A method of making a refractory article is provided. The method includes: a) mixing a binder system, a refractory charge, and a second colloidal binder to form an aqueous slurry; b) casting the aqueous slurry into a mold; c) subjecting the mold containing the aqueous slurry to a temperature that is lower than a slurry casting temperature for a time sufficient to form a green strength article; and d) firing the green strength article at a temperature of at least 450? C. for a time sufficient to achieve thermal homogeneity, thereby forming a refractory article. Refractory articles made in accordance with the method have a unique combination of pore structure and mechanical properties.