Al2O3含量对燃烧合成铝酸钙粉体物相组成的影响

硅酸盐通报 , 2016, 35(5): 1438-1442.

Al2O3含量对燃烧合成铝酸钙粉体物相组成的影响

刘科燕 ^1, , 肖国庆 ^2, , 丁冬海 ^3, , 杨守磊 ^4,

1.西安建筑科技大学材料与矿资学院,西安,710055

2.西安建筑科技大学材料与矿资学院,西安,710055

3.西安建筑科技大学材料与矿资学院,西安,710055

4.西安建筑科技大学材料与矿资学院,西安,710055

基金项目: 西安建筑科技大学基础研究基金(JC1310) 国家自然科学基金资助项目(51272203,51572212) 陕西省国际合作项目(2014KW10-05)

关键词：铝酸钙粉体 , 燃烧合成(CS) , 物相组成 , 热力学计算

Effect of Al2O3 Content on Phases Compositions of Synthesized Calcium Aluminate Powders by CS

Keywords： calcium aluminate powders , combustion synthesis , phase composition , thermodynamic calculation

本文以CaO、Al和Al2O3为原料,在氧气气氛下,采用燃烧合成法(CS)制备铝酸钙粉体,计算了CaO-Al-Al2O3-O2体系的绝热温度,结合物质自由能函数的相关理论、X衍射法(XRD),研究了Al2O3含量对燃烧合成铝酸钙粉体物相组成的影响.热力学计算及XRD物相分析结果表明:体系绝热温度随Al2O3含量的增多而降低,但均大于1800 K,说明体系反应可自持;当Al2O3/(Al2O3+ CaO) (mole)分别为0.3,0.47和0.55时,物相组成分别为C3A和C12A7,C12A7和CA,CA和CA2;热力学数据显示C12A7-C3A、C12A7-CA和CA-CA2之间物相可实现转化,但由于燃烧合成反应速度过快及不可控性导致物相之间尚未完成转化,致使燃烧合成铝酸钙的物相生成量与理论量有较大差异.

参考文献

[1]	Yi HC.;Guigne JY.;Moore JJ.;Schowengerdt FD.;Robinson LA.;Manerbino AR..Preparation of calcium aluminate matrix composites by combustion synthesis[J].Journal of Materials Science,200221(21):4537-4543.
[2]	M.F. Zawrah;N.M. Khalil.Synthesis and characterization of calcium aluminate nanoceramics for new applications[J].CERAMICS INTERNATIONAL,20078(8):1419-1425.
[3]	Park YJ;Kim YJ.Blue emission properties of Eu-doped CaAl2O4 phosphors synthesized by a flux method[J].Materials Science & Engineering, B. Solid-State Materials for Advanced Technology,20081/3(1/3):84-88.
[4]	Shahriar Iftekhar;Jekabs Grins;Gunnar Svensson.Phase formation of CaAl_2O_4 from CaCO_3-Al_2O_3 powder mixtures[J].Journal of the European Ceramic Society,20084(4):747-756.
[5]	宋雅楠;朱伯铨;李享成.温度对合成含镁铝尖晶石铝酸盐水泥的影响[J].耐火材料,2014(2):116-118.
[6]	S. Mukhopadhyay;S. Dutta.Comparison of solid state and sol-gel derived calcium aluminate coated graphite and characterization of prepared refractory composite[J].CERAMICS INTERNATIONAL,20126(6):4997-5006.
[7]	Vishista, K;Gnanam, FD;Awaji, H.Sol-gel synthesis and characterization of alumina-calcium hexaaluminate composites[J].Journal of the American Ceramic Society,20055(5):1175-1179.
[8]	Chandradass, J;Bae, DS;Kim, KH.Synthesis of calcium hexaaluminate (CaAl12O19) via reverse micelle process[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,200948/49(48/49):2429-2432.
[9]	Robert Ianos;Ioan Lazau;Cornelia Pacurariu.Fuel mixture approach for solution combustion synthesis of Ca_3Al_2O_6 powders[J].Cement and Concrete Research,20097(7):566-572.

上一张下一张

计量

下载量()
访问量()

作者相关

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网