纳米二氧化硅溶胶改性氧化锆陶瓷的研究  

Study of Nano-silica Sol Modifying the Surface of Zirconia Ceramics

作　　者：郑瑞斌[1] 王思钱[1,2] 田柳[1] 周巧珍[1] 林婷婷[1] 任雪瑞[1] 麻健丰[1,2] 

机构地区：[1]温州医科大学附属口腔医院.口腔医学院口腔材料研究中心,浙江温州325027 [2]温州医科大学附属口腔医院.口腔医学院口腔修复科

出　　处：《口腔医学研究》2014年第11期1025-1028,共4页Journal of Oral Science Research

基　　金：国家自然科学基金(编号:81271186);浙江省大学生科技创新活动计划(新苗人才计划)项目(编号:2014R413063);浙江省教育厅基金(编号:Y201121626);温州市科技局基金(编号:Y20110066)

摘　　要：目的:探讨溶胶-凝胶技术在氧化锆表面制备薄纳米二氧化硅涂层对其收缩率、抗弯强度和显微结构的影响。方法:将未结晶的氧化锆采用4种处理方式。A组空白对照组,仅经过1450℃结晶处理;B组经30%纳米二氧化硅溶胶渗透后,再经1450℃结晶处理;C组经1450℃结晶后,用30%纳米二氧化硅溶胶涂布后经1000℃热处理;D组:涂布纳米二氧化硅溶胶后,1450℃结晶处理。对各组试件进行线收缩率、抗弯强度测试、SEM观察断裂面微观形貌。结果:4组试件收缩率均为0.20%。A、B、C、D的抗弯强度分别为(1013.74±59.01)、(800.09±68.86)、(1034.27±73.86)、(1015.96±55.29)MPa,其中B组与其余3组的抗弯强度比较均有显著统计学意义(P<0.05)。结论:纳米二氧化硅溶胶,经溶胶-凝胶技术应用于氧化锆基底表面对于其收缩性能没有显著影响。未结晶氧化锆基底经纳米二氧化硅溶胶彻底渗透后再结晶,其抗弯强度较其他组虽有一定下降,但仍可满足全瓷冠桥的临床抗弯强度要求。结晶前涂布法处理后的氧化锆陶瓷的抗弯强度没有明显变化。Objective： To investigate the effects on linear shrinkage .flexural strength and microstructure of zirconia core by Gel-casting after surface modification with thin nano r＋silica coating. Methods： Specimens （38mm× 10mm ×2. 5mm） of unsinterted zirconia blocks （Soft zirconia） were randomly divided into 4 groups with 10 slices in each group. Group At control group）： only sintered at 1450℃; Group B： processed by 30% silicone infiltration before sintered at 1450℃ ; Group C： sintered at the temperature of 1450℃ firstly, then treated with 30% silicone infiltration right after and sintered at 1000℃ in the end; Group D： sintered at 1450℃ after treated by 30% nano＋＋silica coating. Finally, the linear shrinkage and flexural strength of all samples were measured. The microstructure of the ceramics was observed under scanning electron microscopy （SEM）. Results： The linear shrinkage rates of four groups were 0. 20 %. The flexural strength from A to D was （1013. 7 4± 59.01） MPa, （800.09 ± 68.86） MPa, （1034. 27 ± 73.86） MPa, （1015. 96 ± 55. 29） MPa respectively. Group B gains the lowest bend strength compared with the other three groups（ P〈0. 05）. No significant difference were observed among the group A, C, and D. Conclusion： The technology route of nano-silica sol modifying the surface of unsintered zirconia ceramics by Gel-casting is realistic and feasible, laying the foundation for clinical silane coupling agent treatment before bonding in the future.

关 键 词：纳米二氧化硅溶胶 氧化锆陶瓷 溶胶凝胶法 

分 类 号：R783.1[医药卫生—口腔医学]