会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 4. 发明专利
    • Manufacture of silicon nitride whisker
    • 硅氮化硅的制造
    • JPS6114200A
    • 1986-01-22
    • JP13609884
    • 1984-06-29
    • Nok Corp
    • ANZAI HIROSHIKIKUCHI KENJI
    • C30B29/62C04B35/584C04B35/593C04B35/80C30B23/00
    • C04B35/80C04B35/593C30B23/007C30B29/38
    • PURPOSE:To form easily and efficiently the titled whisker on a sintered body block by calcining a block obtained by molding a mixture of specified whisker material powder and precalcining the molded body in a gaseous N2 atmosphere. CONSTITUTION:A powdery mixture of Si3N4 and 0.5-10wt% oxide ceramic selected from Al2O3, Y2O3, MgO, SiO2, etc. and an organic binder such as PVA are mixed by a wet method, dried, then molded in the form of a plate or a cylinder, and precalcined at 600-1,000 deg.C to obtain a cylindrical block. The block is then calcined in an electric furnace in a gaseous N2 atmosphere at 1,400-1,900 deg.C to form an Si3N4 whisker having about 1mum diameter on the surface and at the inside of the sintered body block. The sintered body block wherein the Si3N4 whisker is uniformly formed on the surface and at the inside or the block impregnated with the same or the different kind of ceramic powder is hot-pressed at 1,700 deg.C to obtain easily a ceramic whisker-reinforced composite ceramic.
    • 目的:通过煅烧通过模制特定晶须材料粉末的混合物并在N2气氛中预煅烧成型体而获得的块体,容易且有效地形成烧结体块上的标题晶须。 构成:将选自Al 2 O 3,Y 2 O 3,MgO,SiO 2等的Si 3 N 4和0.5〜10重量%的氧化物陶瓷和有机粘合剂如PVA的粉末混合物通过湿法混合,干燥,然后以板的形式 或圆筒,并在600-1,000℃下预煅烧以获得圆柱形块。 然后将该块在电炉中在1400-1,900℃的气态N 2气氛中煅烧,以在烧结体块的表面和内部形成直径约1μm的Si3N4晶须。 烧结体块,其中在表面和内部均匀地形成Si 3 N 4晶须或浸渍有相同或不同种类的陶瓷粉末的块在1700℃下热压以便容易地获得陶瓷晶须增强复合材料 陶瓷。
    • 9. 发明专利
    • Manufacture of needlelike silicon nitride crystal
    • NEEDLELIKE硅酸盐晶体的制造
    • JPS59174600A
    • 1984-10-03
    • JP5079383
    • 1983-03-25
    • Toyota Motor Corp
    • KOJIMA KOUICHI
    • C30B23/00C30B29/62
    • C30B23/007C30B29/38
    • PURPOSE:To manufacture long-sized needlelike silicon nitride crystals by heating a starting material for silicon nitride at a specified temp. in a gaseous nitrogen atmosphere so as to crystallize silicon nitride at a specified temp. CONSTITUTION:A molded starting material 1 for silicon nitride having about 5-20mm. diameter and about 1-10mm. thickness and consisting essentially of 50- 70mol% silicon nitride, 5-15% yttria and 20-40% spinel is put in a crucible 2 of carbon or the like. A crystallizing wall body 3 of carbon or the like having many projections on the wall is placed on the crucible 2, and the whole system is maintained in a heat insulated state in a tightly sealed space. While keeping the whole system at about 1,200 deg.C, the starting material 1 is heated to 1,700- 1,950 deg.C, and gaseous nitrogen is fed from a lower part to an upper part. The gaseous nitrogen is heated to 1,700-1,950 deg.C by the material 1, and it is cooled to 1,300-1500 deg.C until it reaches the crystallizing zone. In the zone, needlelike silicon nitride crystals having about 1-3mm. length are deposited on the projections of the wall body 3. The crystals are colorless or white and transparent.
    • 目的:通过在特定温度下加热氮化硅原料来制造长针状氮化硅晶体。 在气态氮气气氛中使氮化硅在规定温度下结晶。 构成:用于氮化硅的模制起始材料1,其具有约5-20mm。 直径约1-10mm。 厚度并且基本上由50-70mol%的氮化硅,5-15%的氧化钇和20-40%的尖晶石组成,放入碳等的坩埚2中。 在坩埚2上放置有在壁上具有许多突起的碳等的结晶壁体3,并且整个系统在紧密密封的空间中保持在绝热状态。 在将整个系统保持在约1200摄氏度的同时,将起始材料1加热至1,700-1,950℃,并将气态氮从下部供给到上部。 将气态氮通过材料1加热至1,700-1,950℃,并将其冷却至1300-1500℃,直到其达到结晶区。 在该区域中,具有约1-3mm的针状氮化硅晶体。 长度沉积在壁体3的突起上。晶体是无色或白色和透明的。