HA-Al2O3复相陶瓷浆料的调制及其高精度光固化性能
Modulation of HA-Al2O3 Composite Ceramic Paste and Its High Precision Curing Performance
刘秋玉 1黎志伟 1王澳 2王志浩 3王宇蓝 4陈斐1
作者信息
- 1. 武汉理工大学襄阳示范区-湖北隆中实验室,襄阳 441000;武汉理工大学材料复合新技术国家重点实验室,武汉 430070
- 2. 武汉理工大学材料复合新技术国家重点实验室,武汉 430070
- 3. 齐鲁工业大学(山东省科学院)材料科学与工程学部,济南 250353
- 4. 武汉大学口腔医院,武汉 430079
- 折叠
摘要
利用高强度氧化铝(Al2O3)作为增强相,可以改善生物活性材料羟基磷灰石(HA)的强度,但传统水热法制备的HA-Al2O3陶瓷无法实现孔隙大小和孔隙率的精确控制,而光固化增材制造技术可以利用高性能光固化浆料实现HA-Al2O3陶瓷的高精度成型.通过加入分散剂、光引发剂及光吸收剂,调节HA-Al2O3浆料状态,缓解HA粉末、Al2O3粉末和光敏树脂之间折射率不匹配而产生的严重散射效应.本研究探索了光引发剂和分散剂的种类和含量对浆料的影响,流变性和固化性能随着两者含量增加先改善后削弱,光引发剂和分散剂最佳用量分别为0.5％和4％(质量分数).比较了石墨和甲基黄两种光吸收剂对提高打印精度的影响,虽然石墨对浆料的打印精度和流变性均有改善,但是降低了打印质量,因此确定甲基黄的用量为5.0×10-5,最终获得了适用于高精度打印的HA-Al2O3光固化浆料.
Abstract
High-strength alumina(Al2O3)was utilized as a reinforcing phase to improve the strength of hydroxyapatite(HA),a bioactive material,but the HA-Al2O3 ceramics prepared by traditional hydrothermal method could not achieve the precise control of pore size and porosity,whereas the light curing additive manufacturing technology could achieve the high precision molding of HA-Al2O3 ceramics through the high-performance photocurable slurry.The state of HA-Al2O3 slurry is adjusted by the addition of dispersant,photoinitiator,and photoabsorbent to alleviate the severe scattering effect caused by the refractive index mismatch between HA powder,Al2O3 powder,and photosensitive resin.In this study,the effects of the type and content of photoinitiator and dispersant on the slurry were explored.The rheological and curing properties of the slurry are first improved and then weakened with the addition of both,and the optimal dosages of photoinitiator and dispersant are 0.5％and 4％(mass fraction),respectively.The effects of two light absorbers,graphite and methyl yellow,on improving the printing accuracy were compared.Although graphite improves the printing accuracy and rheology of the slurry,it reduces the printing quality,so the dosage of 5.0 × 10-5 methyl yellow is determined,and finally HA-Al2O3 slurries suitable for high precision printing are obtained.
关键词
陶瓷/HA-Al2O3/精度调控/固化深度/流变性/浆料调控Key words
ceramics/HA-Al2O3/precision control/curing depth/rheology/slurry control引用本文复制引用
基金项目
国家自然科学基金(51972246)
国家自然科学基金(51521001)
湖北省国际合作项目(2022EHB037)
济南市"新高校20条"资助项目(202333030)
出版年
2024
国家科技期刊平台
NSTL
万方数据