溶胶-凝胶法制备Na1/2La1/2Cu3Ti4O12粉体及陶瓷的结构与巨介电性研究

硅酸盐通报 ›› 2017, Vol. 36 ›› Issue (3): 816-821.

溶胶-凝胶法制备Na1/2La1/2Cu3Ti4O12粉体及陶瓷的结构与巨介电性研究

刘展晴

渭南师范学院化学与材料学院,渭南,714099

出版日期:2017-03-15 发布日期:2021-01-18
基金资助:
国家自然科学基金(21503150)%陕西省自然科学基金(16JMR02)%渭南师范学院研究项目(2015JYKX021,16ZRR02)%秦东化工,材料技术调查(14TSXK04)

Microstructure and High Dielectric Performance of Na1/2La1/2Cu3Ti4O12 Powder and Ceramics by Sol-gel Method

LIU Zhan-qing

Online:2017-03-15 Published:2021-01-18

摘要/Abstract

摘要： 采用溶胶-凝胶法制备Na1/2La1/2Cu3Ti4O12 (NLCTO)粉体和陶瓷样品,探讨不同Ti4+浓度、pH值和水含量对NLCTO粉体和陶瓷结构的影响.结果表明在Ti4+浓度为0.75~1.0 mol/L,pH=0.3~1.3,[H2O]/[Ti4+]=11∶1的条件下制备的干凝胶在800 ℃预烧后,粉体分散程度较好,颗粒均匀.在获得优越NLCTO粉体基础上制备的陶瓷材料介电常数约可达到1.9×104以上,介电损耗降低到0.039.

关键词: 溶胶-凝胶法;Na1/2La1/2Cu3Ti4O12;形貌;介电性能

Abstract: Na1/2La1/2Cu3Ti4O12 powder and ceramics were successfully achieved by sol-gel method.Effect of concentration, pH value and the molar ratio of the water and titanium of the sol on microstructure of NLCTO powder and ceramics were investigated in detail, respectively.The results found that the concentration, pH value and the molar ratio of the water and titanium of the sol for 0.75-1.0 mol/L, 0.3-1.3 and 11.0, respectively, after calcining at 800 ℃ for 10 h,NLCTO powder show more dispersion and homogeneity.Based on the superior NLCTO powder, dielectric constant of the prepared NLCTO ceramics increased to 1.9×104, and dielectric loss decreased to 0.039.

Key words: sol-gel method;NLCTO;microstructure;dielectric performance

中图分类号:

TM282

刘展晴. 溶胶-凝胶法制备Na1/2La1/2Cu3Ti4O12粉体及陶瓷的结构与巨介电性研究[J]. 硅酸盐通报, 2017, 36(3): 816-821.

LIU Zhan-qing. Microstructure and High Dielectric Performance of Na1/2La1/2Cu3Ti4O12 Powder and Ceramics by Sol-gel Method[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2017, 36(3): 816-821.

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