摘要
利用差热扫描量热法(DSC)原理考察了Al_(2)O_(3)/ZrO_(2)光敏陶瓷浆料的光固化动力学过程,研究了紫外光能量和填料对陶瓷浆料光固化动力学的影响,确立了光固化Al_(2)O_(3)/ZrO_(2)陶瓷浆料的固化动力学方程。随紫外光能量从300 mJ/cm^(2)增大到1950 mJ/cm2,氧化铝陶瓷浆料的最大反应速率从0.58 s^(-1)提高到0.99 s^(-1),转化率从55%增大到79%;同样温度和紫外光能量下,随Al2O3含量从100%降到25%,体系转化率从79.0%降低到55.8%。实验表明,增大紫外光的能量会提高陶瓷浆料光固化反应的反应速率和最终转化率,转化率随体系内Al_(2)O_(3)含量的减少而降低。最终得到了固体含量为40%的Al_(2)O_(3)/ZrO_(2)陶瓷浆料的固化动力学方程,Al_(2)O_(3)陶瓷浆料的表观活化能为233.7 kJ/mol,ZrO_(2)陶瓷浆料的表观活化能为767.2 kJ/mol。
The photocuring kinetics of Al_(2)O_(3)/ZrO_(2)photosensitive ceramics slurry were investigated using differential scanning calorimetry(DSC).The effects of UV energy and ceramic fillers on the photocuring kinetics of Al_(2)O_(3)/ZrO_(2)ceramics slurry were studied,and the curing kinetic equations of UV-cured Al_(2)O_(3)/ZrO_(2)ceramics slurry were established.The maximum reaction rate of alumina ceramics slurry increased from 0.58 s^(-1) to 0.99 s^(-1)When UV energy increased from 300 mJ/cm^(2) to 1950 mJ/cm^(2),and the conversion rate increased from 55%to 79%,While the system conversion rate decreased from 79.0%to 55.8%as the content of Al_(2)O_(3) decreased from 100%to 25%at the same temperature and UV energy.The experimental results show that the reaction rate and the final conversion rate of the photocuring reaction of ceramics are increasing with the increase of UV energy,and the conversion rate decrease with the decrease of Al_(2)O_(3) content in the system.Finally,curing dynamics equation of the Al_(2)O_(3)/ZrO_(2)ceramic slurry with a solid content of 40%have been obtained.The apparent activation energy for Al_(2)O_(3) ceramics slurry is 233.7 kJ/mol,and for ZrO_(2) ceramics slurry is 767.2 kJ/mol.
作者
侯宇婷
焦守政
马克明
陆春
HOU Yu-ting;JIAO Shou-zheng;MA Ke-ming;LU Chun(College of Materials Science and Engineering,Shenyang Aerospace Univeristy,Shenyang 110136,China;College of Chemistry and Chemical Engineering,Guangxi University for Nationalities,Nanning,530006,China)
出处
《沈阳航空航天大学学报》
2021年第2期44-51,共8页
Journal of Shenyang Aerospace University
基金
航空科学基金(项目编号:2017ZE54029)
辽宁省科学事业公益研究基金(项目编号:20170014)。