The Preparation and Properties of Oxynitride Glasses
The Preparation and Properties of Oxynitride Glasses
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氮氧化物玻璃的制备及性能
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
K. Jack
中科院分区：
文献类型：
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作者：
R. Drew;S. Hampshire;K. Jack
在M-Si-Al-O-N系统中含大于15 a/o N的玻璃，其中M是Mg、Ca、Y和Nd，通过在1700 ℃及以上熔融金属氧化物与SiO 2、Al 2 O 3、Si 3 N 4和Al N的粉末混合物，然后在氮气气氛中以不大于200 ℃/min的速度冷却而获得。在相同的阳离子组成、粘度、玻璃化转变温度，抗失透性和折射率最初都随着氮浓度的增加而增加。在氮化硅和用MgO和Y2 O3致密化的Sialon中，晶界玻璃相的表征是重要的，因为它们通常决定陶瓷的高温行为。它们的失透可以产生亚稳相，否则无法获得，例如。在Mg-Si-Al-O-N系统中，适当的玻璃组成产生（i）具有极大扩展的菲安石结构的β"-镁赛隆，和（ii）氮透锂长石，Mg 2SiAlO 4 N。
Glasses containing more than 15a/o N in M-Si-Al-O-N systems where M is Mg, Ca, Y and Nd are obtained by fusing powder mixtures of the metal oxide with SiO2 Al2O3, Si3N4 and A1N at 1700°C and above, and then cooling in a nitrogen atmosphere at not greater than 200°C/min. With the same cation composition, viscosity, glass transition temperature, resistance to devitrification and refractive index all increase initially with increasing nitrogen concentration. The characterization of grain-boundary vitreous phases in silicon nitride and in β’-sialons densified with MgO and Y2O3 is important because they often determine the high-temperature behaviour of the ceramic. Their devitrification can produce metastable phases that otherwise are not obtainable, eg. appropriate glass compositions in the Mg-Si-Al-O-N system give (i) β”-magnesium sialons with greatly expanded phenacite structures, and (ii) nitrogen petalite, Mg2SiA104N.