采用高分子网络凝胶法成功地制备出Li2O-Al2O3-SiO2-ZrO2(LASZ)微晶玻璃粉,探讨了添加不同含量ZrO2对LASZ微晶玻璃的析晶行为和相转变的影响.研究表明:热处理温度在700～1200 ℃时,LASZ微粉先形成六方晶系的β-石英固溶体,随热处理温度的升高,逐渐转变为稳定的四方晶系β-锂辉石固溶体.ZrO2含量增加,降低了β-石英固溶体的结晶温度,延迟了β-石英固溶体向β-锂辉石固溶体的转变.当ZrO2的物质的量分数从0增加到4.0%时,析晶活化能从304.6kJ/mol降低到248.9kJ/mol.所获得的LASZ粉末晶粒大小为20～60 nm,晶粒尺寸随温度的升高而增大,随ZrO2的增加而下降.本实验所制备的LASZ微晶玻璃的热膨胀系数为(4～14)×10-7/℃.
参考文献
| [1] | Guedes M;Ferro A C;Ferreira J M F .Nucleation and crystal growth in commercial LAS compositions[J].Journal of the European Ceramic Society,2001,21:1187-1194. |
| [2] | Partridge G .An overview of glass ceramics:Part 1 development and principal bull application[J].Glass Technology,1994,35(03):116-127. |
| [3] | Maier V;Muller G .Mechanism of oxide nucleation in lithium aluminosilicate glass-ceramics[J].Journal of the American Ceramic Society,1987,70(08):176-178. |
| [4] | Hsu J Y;Speyer R F .Comparison of the effect of titania and tantalum oxide nucleating agents on the crystallization of Li2O@Al2O3 @6SiO2 glass[J].Journal of the American Ceramic Society,1989,72(12):2334-2341. |
| [5] | 刘丽辉.晶核剂对Li2O-Al2O3-SiO2系统微晶玻璃热膨胀系数的影响[J].玻璃与搪瓷,1996(02):10. |
| [6] | Sack V W;Scheidler H .Effect of the nucleating agent TiO2 and ZrO2 upon the separating crystalline phase during the production of glass-ceramics[J].Glastechnische Berichte,1966,39(03):126-130. |
| [7] | Stewart D R.TiO2 and ZrO2 as nucleates in a lithium aluminosilicate glass-ceramics[A].Columbus:American Ceramic Society,1971:83-90. |
| [8] | Lin M H;Wang M C .Crystallization behavior of β-spodumene in the calcinations of Li2O-Al2O3-SiO2-ZrO2 gels[J].Journal of Materials Science,1995,30:2761-2721. |
| [9] | Douy A .Polyacylamide gel:an efficient tool for easy synthesis of multicomponent oxide precursors of ceramics and glasses[J].International Journal of Inorganic Materials,2001,3:699-707. |
| [10] | 吴松全,王福平,何利娜,姜兆华.聚丙烯酰胺凝胶法制备Li2O-Al2O3-SiO2微晶玻璃超微粉[J].硅酸盐学报,2004(02):200-204. |
| [11] | Bansal N P;Doremus R H;Bruce A J et al.Kinetics of crystallization of ZrF4-BsF2-LaF3 glass by differential scanning calorimetry[J].Journal of the American Ceramic Society,1983,66(04):233-238. |
| [12] | Bansal N P;Doremus R H .Determination of reaction kinetic parameters from variable temperature DSC or DTA[J].Journal of Thermal Analysis,1984,29(01):115-119. |
| [13] | Partridge G .Nucleation and crystallisation phenomena in low expansion Li2O-Al2 O3-SiO2 glass ceramics[J].Glass Technology,1982,23(03):133-138. |
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