| B2O3-Bi2O3-ZnO-Al2O3玻璃助烧剂对BaTiO3陶瓷烧结条件、晶体结构和介电性能的影响 |
| Effect of B2O3-Bi2O3-ZnO-Al2O3 glass additive on sintering condition, crystal structure, and dielectric properties of BaTiO3 ceramics |
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| 摘要: 通过调节B2O3‐Bi2O3‐ZnO‐Al2O3(BBZA)玻璃的添加量研究其对钛酸钡(BaTiO3)陶瓷烧结条件、晶体结构和介电性能的影响。结果表明：添加适量的BBZA玻璃能够有效地将BaTiO3陶瓷烧结温度由1350℃降至950℃，并使其致密化。同时，添加BBZA玻璃后，BaTiO3的晶体结构随着烧结温度的升高而发生转变(立方相→四方相)。另外，BBZA玻璃的引入使BaTiO3陶瓷的居里峰得到了有效的抑制和拓宽。陶瓷微观形貌显示，玻璃相均匀分布在BaTiO3晶粒表面。优化的BaTiO3陶瓷制备条件如下：BBZA添加量(质量分数)为2.0%，烧结温度为950℃。在该条件下制备的BaTiO3陶瓷介电常数达到1364，介电损耗低至1.2%。 |
| 关键词: BaTiO3 B2O3-Bi2O3-ZnO-Al2O3玻璃 低温烧结 |
| 基金项目: 辽宁省教育厅项目(No.2019FWDF01)资助。 |
| Abstract: The effects of B2O3-Bi2O3-ZnOAl2O3 (BBZA) glass on the sintering conditions, crystal structure, and dielectric properties of barium titanate (BaTiO3) ceramics were investigated. The results show that the addition of the appropriate amount of BBZA glass powder can effectively reduce the sintering temperature of BaTiO3 ceramics from 1350 to 950 ℃ and make it densified. Consequently, the structure of BaTiO3 phase changed (cubic phase → tetragonal phase) with the increase of sintering temperature after adding BBZA glass. Additionally, the Curie peak of BaTiO3 ceramics were effectively suppressed and broadened. The ceramic microstructure showed that the glass phase was uniformly distributed on the surface of BaTiO3 grains. The optimized preparing conditions for the BaTiO3 ceramics were as follows: the addition (mass fraction) of BBZA glass was 2.0% and the sintering temperature was 950 ℃. The BaTiO3 ceramics prepared under these conditions had a dielectric constant of 1 364 and a dielectric loss as low as 1.2%. When the sintering temperature was higher than 950 ℃, the addition amount of BBZA glass should not be greater than 2.0%, too much BBZA glass will lead to the semiconducting of BaTiO3. |
| Keywords: BaTiO3 B2O3-Bi2O3-ZnO-Al2O3 glass low-temperature sintering |
| 投稿时间：2022-09-23 修订日期：2022-12-12 |
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