Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention discloses a method for preparing wear-resistant aluminum oxide ceramic. The wear-resistant aluminum oxide ceramic comprises the following components in percentage by mass: 84-98% of aluminum oxide, 0.1-3% of a rare earth samarium compound, 1-15% of sintering aids and 0-2.0% of a surfactant, wherein the sum of percentage by mass of all the raw materials is 100%, the sintering aids are compounds of calcium, magnesium and silicon or minerals and the surfactant is one of tri-ammonium citrate, ammonium polyacrylate, polyethylene imine, polyethylene glycol, polycarboxy ammonium and chitosan. The method comprises the following stops of placing the raw materials in a ball mill and mixing the raw materials for 5-72 hours to obtain slurry; molding the obtained slurry to obtain a spherical green body; sintering the green body at 1000-1600 DEG C, carrying out heat preservation for 30-300 minutes and cooling in a furnace. The finished product is tested according to JC/T848.1-1999, the wear loss is 0.1-0.5% which reaches the industry standard (less than or equal to 3%). A general industrial device is adopted and the process is simple and is convenient to industrial production.
The invention discloses a method for preparing wear-resistant aluminum oxide ceramic. The wear-resistant aluminum oxide ceramic comprises the following components in percentage by mass: 84-98% of aluminum oxide, 0.1-3% of a rare earth samarium compound, 1-15% of sintering aids and 0-2.0% of a surfactant, wherein the sum of percentage by mass of all the raw materials is 100%, the sintering aids are compounds of calcium, magnesium and silicon or minerals and the surfactant is one of tri-ammonium citrate, ammonium polyacrylate, polyethylene imine, polyethylene glycol, polycarboxy ammonium and chitosan. The method comprises the following stops of placing the raw materials in a ball mill and mixing the raw materials for 5-72 hours to obtain slurry; molding the obtained slurry to obtain a spherical green body; sintering the green body at 1000-1600 DEG C, carrying out heat preservation for 30-300 minutes and cooling in a furnace. The finished product is tested according to JC/T848.1-1999, the wear loss is 0.1-0.5% which reaches the industry standard (less than or equal to 3%). A general industrial device is adopted and the process is simple and is convenient to industrial production.
| Europäisches Patentamt | 2024
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