摘要
以富硼渣为主要原料,采用碳热还原氮化法合成了组分为(Ca,Mg)xSi12-3xAl3xOxN16-x(x=0.3,0.6,1.0,1.4和1.8)的(Ca,Mg) α′-Sialon/BN陶瓷粉体.利用XRD,SEM和EDX检测手段研究了x值对合成产物相组成和显微形貌的影响.结果表明:α′-Sialon含量随着x值的增大逐渐增加,当x=1.4时,α′-Sialon含量达到最大值.继续增大x值,产物中α′-Sialon减少,而Al N增多,并出现一定量的15R(Si Al4O2N4).当x≥1.4时,α′-Sialon晶粒为长柱状.
The （Ca, Mg） α＇-Sialon/BN composite powder was synthesized by carbothermal reduction nitridation with boron-rich slag as main starting material, of which the composition is （Ca,Mg）xSi12-3xAl3xOxN16-x where x is ranging from 0.3 to 1.8. The effect of different x values on the phase composition and microstructure of synthesized products were investigated by XRD（ X-ray diffraction）, SEM （ scanning electron microscope） and EDX （ energy dispersive X- ray）. The results showed that the content of a＇-Sialon increases with increasing value of x and comes up to the maximum when x 1.4 but decreases when x value exceeding 1.4 with increasing A1N and a certain amout of 15R（SiAl4O2N4） found. The α＇-Sialon grains presents long columnar grains when x≥1. 4.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第2期221-224,237,共5页
Journal of Northeastern University(Natural Science)
基金
国家高技术研究发展计划项目(2006AA06Z368)
辽宁省科学技术基金资助项目(20081016)
