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was prepared by conventional melt quenching technology(R stands for alkali-earth element, M stands for alkali-metal element) and the composition range(in mass fraction) of the glass is as follows: SiO2, 55.0... the mass fraction of alkali-metal oxide is more than 17.8%; when introducing different kinds but the same quantity of alkali-earth metal oxide, the thermal expansion coefficient of the glass increases......
Synthesis of(Sr,Eu)CO3@SiO2 core-shell-like precursor for alkali earth silicate phosphors胡运生1,郝建华2,庄卫东1,黄小卫1,何华强11. National Engineering Research Center for Rare Earth Materials,General Research...(XRD) and scanning electron microscopy(SEM).This strategy could be applied to construct core-shellstructured precursors for the preparation of alkali earth silicate phosphors.关键词:......
Synthesis of(Sr,Eu)CO3@SiO2 core-shell-like precursor for alkali earth silicate phosphors胡运生1,郝建华2,庄卫东1,黄小卫1,何华强11. National Engineering Research Center for Rare Earth Materials,General Research...(XRD) and scanning electron microscopy(SEM).This strategy could be applied to construct core-shellstructured precursors for the preparation of alkali earth silicate phosphors.关键词:......
metallurgy and subsequent heat treatment LIU Rui-feng(刘瑞峰)1, 2, WANG Wen-xian(王文先)2, 3, CHEN Hong-sheng(陈洪胜)2, 4 1. College of Aeronautics and Astronautics, Taiyuan University of Technology, Taiyuan 030024...), followed by T6 treatment. The microstructural evolution and mechanical properties were investigated. Results showed that the status of B4C particles changed from a network after SPS to a dispersion......
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treatment CHU Chen-liang(褚晨亮)1, WU Xiao-quan(吴孝泉)1, QIU Shui-cai(邱水才)2, TANG Bin-bing(汤斌兵)3, YIN Zheng(殷正)1, YAN Hong(闫洪)1, LUO Chao(罗超)3, HU Zhi(胡志)1 1. Institute of Advanced Forming, Nanchang... during semi-solid isothermal heat treatment were investigated deeply in the present work. Results showed that the lamellar (Mg,Al)3Gd phases transformed into the particle-like Al2Gd phases in AZ31......
Replacement of alkali silicate solution with silica fume in metakaolin-based geopolymersAhmed Nmiri1,22. Department of Chemistry, Faculty of Sciences of Tunis, University of Tunis El-Manar摘 要:
Synthesis of crystalline perovskite-structured SrTiO3 nanoparticles using an alkali hydrothermal processU.K.N.Din,T.H.T.Aziz,M.M.Salleh,A.A.UmarInstitute of Microengineering and Nanoelectronics (IMEN... an alkali hydrothermal process at low temperatures without further heating.Furthermore,we studied the influence of heating time(at 180℃) on the crystallinity,morphology,and perovskite phase formation......
Influence of processing parameters and heat treatment on phase composition and microstructure of plasma sprayed hydroxyapatite coatings ZHAO Guo-liang(赵国亮)1, WEN Guang-wu(温广武)1, WU Kun... parameters on the phase composition and the microstructure of the obtained coatings was investigated. The effect of heat treatment on as-sprayed coating in terms of the crystallinity......
碱土金属化合物对焦炭反应性的影响郭豪1,张建良1,马欢1,陈永星1(1.北京市北京科技大学 冶金与生态工程学院)摘 要:在焦炭干馏过程前向焦煤中加入催化剂,通过碳化干馏试验在实验室炼制出含有碱土金属化合物的焦样,并对焦样进行了反应性试验,XRD检测和SEM扫描电镜分析,研究了不同碱土金属化合物及碱土金属化合物的不同添加量对焦炭反应性的影响,得出了碱土金属化合物对焦炭反应性的影响规律并分析了碱土金属化合物的分布规律及赋存状态.关键词:碱土金属； 焦炭； 反应性； 催化剂......
