摘要:
A composition having nanoparticles of a refractory-metal carbide or refractory-metal nitride and a carbonaceous matrix. The composition is not in the form of a powder. A composition comprising a metal component and an organic component. The metal component is nanoparticles or particles of a refractory metal or a refractory-metal compound capable of decomposing into refractory metal nanoparticles. The organic component is an organic compound having a char yield of at least 60% by weight or a thermoset made from the organic compound. A method of combining particles of a refractory metal or a refractory-metal compound capable of reacting or decomposing into refractory-metal nanoparticles with an organic compound having a char yield of at least 60% by weight to form a precursor mixture.
摘要:
A method and a ceramic made therefrom by: providing a composition of a compound having the formula below and a metallic component, and pyrolyzing the composition. The value n is a positive integer. Q is an acetylenic repeat unit having an acetylene group, crosslinked acetylene group, (MLx)y-acetylene complex, and/or crosslinked (MLx)y-acetylene complex. M is a metal. L is a ligand. The values x and y are positive integers. The metallic component is the (MLx)y-acetylene complex in the compound or a metallic compound capable of reacting with the acetylenic repeat unit to form the (MLx)y-acetylene complex. The ceramic comprises metallic nanoparticles.
摘要:
A process of making carbon nanotubes comprising the steps of: providing a precursor composition comprising at least one metallic compound and at least one organic compound; wherein the organic compound is selected from the group consisting of an ethynyl compound a metal-ethynyl complex, and combinations thereof; wherein the precursor composition is a liquid or solid at room temperature; and heating the precursor composition under conditions effective to produce carbon nanotubes. A carbon nanotube composition comprising carbon nanotubes and a metal component selected from the group consisting of metal nanoparticles and elemental metal; wherein the carbon nanotube composition is rigid.
摘要:
A process of making metal nanoparticles comprising the steps of: providing a precursor composition comprising at least one metallic compound and at least one organic compound; wherein the organic compound is selected from the group consisting of an ethynyl compound, a metal-ethynyl complex, and combinations thereof; wherein the precursor composition is a liquid or solid at room temperature; and heating the precursor composition under conditions effective to produce metal nanoparticles. A metal nanoparticle composition comprising metal nanoparticles dispersed homogenously in a matrix selected from the group consisting of ethynyl polymer, crosslinked ethynyl polymer, amorphous carbon, carbon nanotubes, carbon nanoparticles, graphite, and combinations thereof.
摘要:
A process of making metal nanoparticles comprising the steps of: providing a precursor composition comprising at least one metallic compound and at least one organic compound; wherein the organic compound is selected from the group consisting of an ethynyl compound, a metal-ethynyl complex, and combinations thereof; wherein the precursor composition is a liquid or solid at room temperature; and heating the precursor composition under conditions effective to produce metal nanoparticles. A metal nanoparticle composition comprising metal nanoparticles dispersed homogenously in a matrix selected from the group consisting of ethynyl polymer, crosslinked ethynyl polymer, amorphous carbon, carbon nanotubes, carbon nanoparticles, graphite, and combinations thereof.
摘要:
Described herein is a method for growing InN, GaN, and AlN materials, the method comprising alternate growth of GaN and either InN or AlN to obtain a film of InxGa1−xN, AlxGa1−xN, AlxIn1−xN, or AlxInyGa1−(x+y)N
摘要翻译:本文描述了用于生长InN,GaN和AlN材料的方法,该方法包括交替生长GaN和InN或AlN以获得In x Ga 1-x N,Al x Ga 1-x N,Al x In 1-x N或Al x In y Ga 1-(x + y)N
摘要:
Provided is an electroless iron bath capable of depositing a ferromagnetic FeB coating onto Pd/Sn-catalyzed substrates at room temperature without the need for an accompanying galvanic couple. The new electroless iron bath is comprised of Fe2+ as the metal source, citrate as the metal chelator, boric acid buffer as the pH controller, and borohydride as the reductant. Surface analysis following plating confirms the deposition of an amorphous FeB coating onto the surface of Pd/Sn-catalyzed cellulose microfibers.
摘要:
Zinc oxide stabilized zirconia containing zirconia in cubic phase is prepd by evaporating zirconia and zinc oxide and depositing zirconia and zinc oxide on an atomic scale on a substrate. The stabilized zirconia resists corrosion at high temperatures above 1000.degree. C., can be used as a part of a barrier coating, is transparent to visible light, and is electrically conducting.
摘要:
This disclosure concerns a method of making silicon carbide involving adding agricultural husk material to a container, creating a vacuum or an inert atmosphere inside the container, applying conventional heating or microwave heating, heating rapidly, and reacting the material and forming silicon carbide (SiC).