摘要:
Metal ion conducting ceramic materials are disclosed having characteristics of high ion conductivity for certain alkali and monovalent metal ions at low temperatures, high selectivity for the metal ions, good current efficiency and stability in water and corrosive media under static and electrochemical conditions. The metal ion conducting ceramic materials are fabricated to be deficient in the metal ion. One general formulation of the metal ion conducting ceramic materials is Me 1+x+y-z M III y M IV 2-y Si x P 3-x O 12-z/2 , wherein Me is Na + , Li + , K + , Rb + , Cs + , Ag + , or mixtures thereof, 2.0 ≤ x ≤ 2.4, 0.0 ≤ y ≤ 1.0, and 0.05 ≤ z ≤ 0.9, where M III is Al 3+ , Ga 3+ , Cr 3+ , Sc 3+ , Fe 3+ , In 3+ , Yb 3+ , Y 3+ , or mixtures thereof and M IV is Ti 4+ , Zr 4+ , Hf 4+ , or mixtures thereof.
摘要:
The invention relates to a method for obtaining ceramic compounds and to the resulting material, comprising the following steps: using as a starting compound an LAS component having composition LixAlySizOw, wherein x varies between 0.8 and 1.2, y varies between 0.8 and 1.2, z varies between 0.8 and 2 and w varies between 4 and 6; mixing the LAS component with SiC nanoparticles, thereby obtaining a stable homogeneous suspension; drying the resulting suspension; shaping the material obtained; and, finally, sintering the material obtained in the previous step. The resulting material has a density greater than 98% of theoretical density and can be used in the aerospace industry, microelectronics and precision optics.
摘要:
The present invention provides a refractory composition containing expandable powder that consists of an alkali metal oxide and silicon oxide and is coated onto a steel frame structure of a building or a structure requiring fire prevention or fireproofing in order to prevent the strength or resistance force of the structure from being deteriorated by high-temperature heat in case of fire. The refractory composition of the present invention specifically consists of 1wt% to 50wt% of expandable powder composed of silicate, 20wt% to 80wt% of silicate binder, 0.05wt% to 5wt% of stabilizer, and 0.01wt% to 10wt% of fiber.
摘要:
A silicon carbide material according to the present invention includes a substrate containing, as a main component, silicon carbide or containing, as main components, silicon carbide and metallic silicon, and a film covering at least a portion of the surface of the substrate. The film contains, as a main component, a phase including at least four elements: lithium (Li), aluminum (Al), silicon (Si), and oxygen (O). One example of such a silicon carbide material includes a substrate having a structure in which silicon carbide particles are bonded by metallic silicon, and a lithium aluminosilicate film covering at least a portion of the surface of the silicon carbide particles. Such a silicon carbide material can be used for a DPF, an electric heating type catalytic converter, or the like.
摘要:
A composition for applying to a honeycomb body includes a refractory filler, an organic binder, an inorganic binder, and a liquid vehicle, wherein the refractory filler, the particle size distribution of the refractory filler, the organic binder, and the inorganic binder are selected such that, when the composition is applied to plug a plurality of channels of the honeycomb body, the plug depth variability is reduced.
摘要:
A composition includes a carbon nanotube (CNT)-infused ceramic fiber material, wherein the CNT-infused ceramic fiber material includes: a ceramic fiber material of spoolable dimensions; and carbon nanotubes (CNTs) bonded to the ceramic fiber material. The CNTs are uniform in length and uniform in distribution. A continuous CNT infusion process includes (a) disposing a carbon-nanotube forming catalyst on a surface of a ceramic fiber material of spoolable dimensions; and (b) synthesizing carbon nanotubes on the ceramic fiber material, thereby forming a carbon nanotube-infused ceramic fiber material.
摘要:
The present invention relates to a composite material comprising a ceramic component, characterized in having a negative coefficient of thermal expansion, and oxidic ceramic particles, to the procedure for the obtainment thereof, and to the uses thereof in microelectronics, precision optics, aeronautics and aerospace.