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    • 4. 发明授权
    • Ternary silicon-rare earth nitrides and process for their preparation
    • 三元硅 - 稀土氮化物及其制备方法
    • US5292489A
    • 1994-03-08
    • US720272
    • 1991-06-24
    • Anthony J. FanelliJeffrey P. SolarBeili L. WuJean Yamanis
    • Anthony J. FanelliJeffrey P. SolarBeili L. WuJean Yamanis
    • C04B35/515C04B35/584C04B35/593C04B35/58
    • C04B35/5156C04B35/584C04B35/5935
    • This invention provides a compound having the formula LnSi.sub.3 N.sub.5 wherein Ln is selected from the group consisting of scandium, yttrium, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium. In addition, there is provided a method for making the compound Ln'Si.sub.3 N.sub.5 wherein Ln' is a radical selected from the group consisting of lanthanum, scandium, yttrium, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium, comprising the step of reacting SiO.sub.z, Ln'.sub.x O.sub.y in a nitrogen atmosphere in the presence of carbon at a temperature of from 1200.degree. C. to about 2000.degree. C. for at least 2 hrs., x being an integer equal to or greater than 2, y being an integer equal to or greater than 3, and z being an integer selected from 1 and 2, with the proviso that x and y are selected to result in a stable compound of Ln'.sub.x O.sub.y.
    • 本发明提供具有式LnSi 3 N 5的化合物,其中Ln选自钪,钇,铈,镨,钕,ium,钐,铕,钆,铽,镝,钬,铒,ium,镱和镥 。 此外,提供了一种制备化合物Ln'Si3N5的方法,其中Ln'是选自镧,钪,钇,铈,镨,钕,ium,钐,铕,钆,铽,镝的基团 钬,铒,ium,镱和镥,包括在碳存在下,在1200℃至约2000摄氏度的温度下,在氮气气氛中使SiO 2,L 1 O 10反应至少2小时的步骤 x是等于或大于2的整数,y是等于或大于3的整数,z是选自1和2的整数,条件是选择x和y以产生稳定的化合物 的Ln'xOy。