海南师范大学学报（自然科学版）2023，Vol.36Issue(4)：400-408,9.DOI:10.12051/j.issn.1674-4942.2023.04.007
烧结温度和升温速率对钛酸钡陶瓷结构及介电性能的影响
Effect of Sintering Temperature and Heating Rate on the Structure and Dielectric Properties of Barium Titanate Ceramics
摘要
Abstract
BaTiO3 ceramics were prepared by solid phase method.The effects of sintering temperature and sintering tem-perature on crystal structure,microstructure and dielectric properties of ceramic samples were investigated.The results showed that all the ceramics produced had a tetragonal perovskite lattice structure.Low sintering temperature lead to more defects at multiple points.With the increase of sintering temperature,the uniformity and density of crystals were improved effectively.The increase of grain size promoted the movement of domain walls and improve the dielectric properties.Too slow sintering heating rate also resulted in high point defect concentration,liquid phase generation,more porosity.High po-rosity content reduced the stability of dielectric properties and dielectric constant,and increased dielectric loss.Increasing the heating rate also helped to improve the grain size,uniformity and densification.When the grain size reached around that of single domain,the internal stress of 0,90° ferroelectric domain contributed high dielectric constant.However,too fast heating rate generated"overburning phenomenon"resulting in dielectric properties decline.When the sintering tempera-ture rised to 1 275℃at the rate of 5℃/min,the dielectric constant was the maximum and the dielectric loss was the mini-mum,whose values were ε=2 374,tanδ=0.023 18.关键词
钛酸钡陶瓷/传统固相法/烧结温度/烧结升温速率/介电性能Key words
barium titanate ceramics/solid state reaction/sintering temperature/heating rates/dielectric property分类
化学化工引用本文复制引用
万淇通,张云飞,张梦雅,梁博,邴丽娜,沈振江..烧结温度和升温速率对钛酸钡陶瓷结构及介电性能的影响[J].海南师范大学学报（自然科学版）,2023,36(4):400-408,9.基金项目
海南省自然科学基金项目(521QN240,220RC595) （521QN240,220RC595）
国家自然科学基金项目(11304069) （11304069）
海南师范大学物理学学科建设经费 （）
