首页期刊信息编委及顾问期刊发行联系方式使用帮助常见问题ENGLISH
位置:首页 >> 正文
MgO与Al2O3对Al–MgO–Al2O3体系中MgAlON形成机理的影响
作者:仝尚好1  勇1 焦智宇2 闫明伟1 张宇翠2 铁占鹏3 
单位:(1. 北京科技大学材料科学与工程学院 北京100083 2. 洛阳利尔耐火材料有限公司 河南 洛阳 471000 3. 西宁特殊钢股份有限公司 西宁810000) 
关键词:镁阿隆 氮化铝多型体 氮化铝 形成机理 
分类号:TQ175
出版年,卷(期):页码:2019,47(12):0-0
DOI:
摘要:

 以电熔镁砂、α-Al2O3微粉、板状刚玉、白刚玉、金属铝及高纯镁砂为原料,铝酸镁溶胶为结合剂,氮气条件下1 700 ℃保温4 h分别制备了MgO基和Al2O3基Al–MgO–Al2O3复合材料。研究了氮气低氧分压条件下MgO和Al2O3稳定性差异对Al–MgO–Al2O3复合材料微观结构的影响并揭示了MgO基和Al2O3基中MgAlON形成机理。结果表明:在氮气低氧分压条件下,MgO比Al2O3更不稳定;在1 000 ℃以上随着温度的升高,体系MgO和Al2O3反应形成MgAl2O4,随着温度的升高,C–O2反应的进行,体系内氧分压逐渐降低,MgO不稳定,分解为Mg(g)和O2(g)。在MgO基体系中,MgO分解量较多,导致局部氧分压升高,金属Al部分将被氧化成Al2O(g),与N2(g),Mg(g)和O2(g)发生反应,生成片状MgAlON:Al2O(g)+    O2(g)+N2(g)+Mg(g)→MgAlON(s)。而在Al2O3基体系中,由于MgO分解量减少,氧分压较低,高温下金属Al转变成Al(g),与N2(g),Mg(g)和O2(g)反生反应生成板片状MgAlON:Al(g)+O2(g)+N2(g)+Mg(g)→MgAlON(s)。

基金项目:
作者简介:
参考文献:

 [1] CHAIM R, ZHITOMIRSKY I, GAL-OR L, et al. Electrochemical Al2O3–ZrO2 composite coatings on non-oxide ceramic substrates[J]. J Mater Sci, 1997, 32(2): 389–400.

[2] ZHANG G J, YANG J F, ANDO M, et al. Nonoxide-boron nitride composites: in situ synthesis, microstructure and propertie[J]. J Eur Ceram Soc, 2002, 22(14–15): 2551–2554.
[3] WILLEMS H X, WITH G D, METSELAAR R. Thermodynamics with MgO of Alon III: Stabilization of Alon[J]. J Eur Ceram Soc, 1993, 12(1): 43–49.
[4] WILLEMS H X, HENDRIX M M R M, WITH G D, et al. Thermodynamics of ALON II: phase relations[J]. J Eur Ceram Soc, 1992, 10(4): 339–346.
[5] SUN W Y, MA L T, YAN D S. Phase relations in the system Mg–Al–O–N[J]. J Sci Bull, 1990, 35(14): 1189–1192.
[6] YANG D, ZHANG H, ZHONG X. Study on preparation and mechanical property of MgO–MgAl2O4–MgAlON composite[J]. J Naihuo Cailiao/Refract, 2006, 40(1): 12–15.
[7] PICHLBAUER S, HARMUTH H, LEN?ÉŠ Z, et al. Preliminary investigations of the production of MgAlON bonded refractories[J]. J Ceram Soc, 2012, 32(9): 2013–2018.
[8] BANDYOPADHYAY S, RIXECKER G, ALDINGER F, et al. Effect of controlling parameters on the reaction sintering sequences of formation of nitrogencontaining magnesium aluminate spinel from MgO, Al2O3 and AlN[J]. J Am Ceram Soc, 2004, 87(3): 480–482.
[9] DÍAZ L A, TORRECILLAS R, AZA A H D, et al. Effect of spinel content on slag attack resistance of high alumina refractory castables[J]. J Eur Ceram Soc, 2007, 27(16): 4623–4631.
[10] 程竹, 孙加林, 李福燊, 等. MgAlON及MgAlON结合MgO材料烧结性能研究[J]. 耐火材料, 2010, 44(6): 437–441.
CHENG Z, SUN J L, Li F S, et al. Sintering of MgAlON and MgAlON-bonded materials[J]. Naihuocailiao, 2010, 44(6): 437–441.
[11] LIU X, WANG H, TU B T, et al. Highly transparent Mg0.27Al2.58O3.73N0.27 ceramic prepared by pressureless sintering[J]. J Am Ceram Soc, 2014, 97(1): 63–66.
[12] DAI W B, LIN W, YAMAGUCHI A, et al. Synthsis of magnesium aluminum oxynitride by carbothermal reduction and nitridation process[J]. J ceram Soc Jpn, 2006, 115(1137): 42–46.
[13] GRANON A, GOEURIAT P, THEVENOT F, et al. Reactivity in the Al2O3–AlN–MgO system. The MgAlON spinel phase[J]. J Eur Ceram Soc, 1994, 13(4): 365–370.
[14] WEISS J, GREIL P, GAUCKLER L J. The system A1–Mg–O–N[J]. J Am Ceram Soc, 1982, 65(5).
[15] WANG Q, CUI W, GE Y, et al. Preparation of spherical AlN granules directly by carbothermal reduction-nitridation method[J]. J Am Ceram Soc, 2015, 98(2): 392–397.
[16] 洪彦若,孙加林. 非氧化物复合耐火材料[M]. 北京: 冶金工业出版社, 2004: 248–251.
[17] 陈肇友. 化学材料与耐火材料[M]. 北京: 冶金工业出版社, 2005: 648–651.
服务与反馈:
文章下载】【加入收藏
中国硅酸盐学会《硅酸盐学报》编辑室
京ICP备10016537号-2
京公网安备 11010802024188号
地址:北京市海淀区三里河路11号    邮政编码:100831
电话:010-57811253  57811254    
E-mail:jccs@ceramsoc.com