晶核剂对玻璃纤维分相和析晶的影响

Effects of crystat nucleus on the phase-seperation and crystallization of glass fiber

本文应用差热分析研究了ZrO_2、TiO_2和Cr_2O_3三种晶核剂对MgO 15(wt.%)、Al_2O_3 30(wt%)、SiO_2 55(wt.%)成份点玻璃纤维分相和析晶的影响,得出:不同晶核剂、不同预处理,分相机理不同、分相完善程度不同.1.ZrO_2含量从G(wt.%)的1~#棉增至12(wt.%)的2~#棉,能促进分相和析晶.2.ZrO_2和TiO_2的晶核剂作用相差不太大,都能促进分相和析晶,但混合晶核剂ZrO_29(wt.%)+TiO_2 3(wt.%)的3~#棉中TiO_2的作用在本实验中不显著.3.含Cr_2O_3 5(wt.%)的4~#棉能提高玻璃纤维的耐火度和抗粘结的性能.4.预处理能促进分相.5.770℃预处理时分相完善程度是:ZrO_2 12(wt.%)>ZrO_2 9(wt.%)+TiO_2 3(wt.%)>Cr_2O_3 5(wt.%).6.同一晶核剂在较低温度下分相较完善.

The effect of three kinds of crystal nucteuses-ZrO_2 TiO? and Cr?O?-on phase-seperation and crytailization of glass fiber which is consisted of Mg015(wt%) and A??O_2 30(wt%) and SiO_2 55(wt%) was studied by using difierential thermat analysis (DTA),and the fottowing conclusion could be reached, different crystal nucteuses and different pretreatments have different phase-seperation nechanism and result in different phase-seperation compteteness.