以合成的镁铝尖晶石、莫来石以及 MgO、Al2 O3和 SiO2粉为原料，通过改变原料组成在900~1350℃下固相反应3 h制备了堇青石，研究了不同原料对堇青石物相组成、密度和显微结构的影响。结果表明：堇青石相基本都在1250℃时生成，原料组成对其开始形成温度影响较小，同时在该温度及以上的相演变过程中均出现了镁铝尖晶石相；以镁铝尖晶石或莫来石为原料合成的堇青石比采用纯氧化物合成的密度高，且晶粒发育更完整，晶粒尺寸更大。
With the synthesized spinel and mullite,MgO,Al2 O3 and SiO2 powders as raw materials,the cordierites were synthesized by solid state reaction at 900-1 350 ℃ for 3 h with different raw material composition. The effects of raw material composition on the phase composition,density and microstructure of the synthesized cordierites were studied.The results show that the cordierites were all produced at 1 250 ℃,showing little influence of the raw material composition on the formation temperature.Meanwhile the spinel phase appeared invariably during the phase evolution process at 1 250 ℃ and above.The cordierites prepared using spinel or mullite as raw materials had a higher density than that with pure oxides as raw materials,moreover the grain growth was more complete and the grain size was larger.
参考文献
| [1] | 郑柳萍;张少华;颜桂炀.堇青石耐火材料的研究进展[J].山东陶瓷,2013(1):14-18. |
| [2] | Gonzalez-Velasco, JR;Ferret, R;Lopez-Fonseca, R;Gutierrez-Ortiz, MA.Influence of particle size distribution of precursor oxides on the synthesis of cordierite by solid-state reaction[J].Powder Technology,20051(1):34-42. |
| [3] | J.M. Benito;X. Turrillas;G.J. Cuello.Cordierite synthesis--A time-resolved neutron diffraction study[J].Journal of the European Ceramic Society,20122(2):371-379. |
| [4] | 袁旭暄;贾德昌;周玉.堇青石陶瓷烧结工艺及机理研究[J].陶瓷科学与艺术,2003(6):48-50. |
| [5] | 张巍;韩亚苓;潘斌斌.堇青石的合成工艺研究及结构特征[J].陶瓷学报,2008(1):19-23. |
| [6] | 史志铭;王小凤.几种烧结助剂对堇青石相变影响的比较[J].稀有金属材料与工程,2005(z1):240-243. |
| [7] | 刘靖轩;薛群虎;周永生;屈启龙.添加剂对堇青石合成温度及热膨胀系数的影响[J].中国陶瓷工业,2007(3):1-4. |
| [8] | 孙晓霞;张建;曾国辉.合成堇青石研究[J].陶瓷,2005(7):22-24. |
| [9] | 代刚斌;李红霞;杨彬;王新福.化学组成对合成堇青石显微结构和高温性能的影响[J].耐火材料,2003(2):63-65,74. |
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