کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1476581 | 991157 | 2009 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: High-alumina porcelain with the addition of a Li2O-bearing fluxing agent High-alumina porcelain with the addition of a Li2O-bearing fluxing agent](/preview/png/1476581.png)
We have studied the influence of increasing the amount of β-spodumene (LiAlSi2O6), as a Li2O-containing flux, on the phase composition, the microstructure evolution and the physical properties of high-alumina porcelain. Quartz reacts with β-spodumene in the temperature range 1150–1250 °C, forming lithium aluminium silicates with a larger amount of SiO2. The presence of lithium minerals contributes to a lower CTE for the fired bodies. At 1300 °C an improved flexural strength is achieved with compositions containing 1.0 or 1.2 wt.% of Li2O, as a result of a more uniform microstructure. With increasing amounts of Li2O the overfiring effect is greatly enhanced. The most favourable characteristics from an industrial perspective with regard to flexural strength and deformation during firing were attained by using a high-alumina porcelain composition containing 1.0 wt.% Li2O.
Journal: Journal of the European Ceramic Society - Volume 29, Issue 11, August 2009, Pages 2143–2152