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Method for obtaining three-relaxation-state ferroelectric ceramic with wide temperature range and high dielectric constant
The invention relates to a method for obtaining three-relaxation-state ferroelectric ceramic with a wide temperature range and a high dielectric constant, and belongs to the technical field of electronic ceramic materials. According to the invention, an ion-doped barium titanate system is determined as BCyTSx, and x and y respectively refer to the percentages of BaSnO3 and CaTiO3 in the amount of substance of the whole BCyTSx; a barium titanate ceramic material is designed according to a sequence of ion doping percentages from small to large; a barium titanate ceramic material is prepared, and Curie-Weiss fitting is carried out; a barium titanate ceramic material is analyzed to find out a multiphase coexistence region of a monoclinic phase, an orthorhombic phase and a rhombic phase of the barium titanate ceramic material; when the barium titanate ceramic materials have both relaxation characteristics and multi-phase coexistence regions, and at the moment, the barium titanate ceramic material composition corresponding to the relaxation phase transformation point and the three-critical point is the three-relaxation-state ferroelectric ceramic material. The method has universality in the field of ferroelectric ceramic materials.
本发明涉及一种获得宽温域高介电常数的三弛豫态铁电陶瓷的方法，属于电子陶瓷材料技术领域。本发明确定掺杂了离子的钛酸钡体系为BCyTSx，其中，x、y分别指的是BaSnO3、CaTiO3所占BCyTSx整体的物质的量的百分比；按掺杂离子百分比从小到大的顺序设计钛酸钡系陶瓷材料；制备钛酸钡系陶瓷材料并进行Curie‑Weiss拟合；对钛酸钡系陶瓷材料进行分析，找到钛酸钡系陶瓷材料的单斜相、正交相和菱形相的多相共存区域，当有钛酸钡系陶瓷材料同时具备弛豫特性和多相共存区域，此时对应弛豫相变点和三临界点的钛酸钡系陶瓷材料组成成分即为三弛豫态铁电陶瓷材料。本发明在铁电陶瓷材料领域具有普遍性。
Method for obtaining three-relaxation-state ferroelectric ceramic with wide temperature range and high dielectric constant
The invention relates to a method for obtaining three-relaxation-state ferroelectric ceramic with a wide temperature range and a high dielectric constant, and belongs to the technical field of electronic ceramic materials. According to the invention, an ion-doped barium titanate system is determined as BCyTSx, and x and y respectively refer to the percentages of BaSnO3 and CaTiO3 in the amount of substance of the whole BCyTSx; a barium titanate ceramic material is designed according to a sequence of ion doping percentages from small to large; a barium titanate ceramic material is prepared, and Curie-Weiss fitting is carried out; a barium titanate ceramic material is analyzed to find out a multiphase coexistence region of a monoclinic phase, an orthorhombic phase and a rhombic phase of the barium titanate ceramic material; when the barium titanate ceramic materials have both relaxation characteristics and multi-phase coexistence regions, and at the moment, the barium titanate ceramic material composition corresponding to the relaxation phase transformation point and the three-critical point is the three-relaxation-state ferroelectric ceramic material. The method has universality in the field of ferroelectric ceramic materials.
本发明涉及一种获得宽温域高介电常数的三弛豫态铁电陶瓷的方法，属于电子陶瓷材料技术领域。本发明确定掺杂了离子的钛酸钡体系为BCyTSx，其中，x、y分别指的是BaSnO3、CaTiO3所占BCyTSx整体的物质的量的百分比；按掺杂离子百分比从小到大的顺序设计钛酸钡系陶瓷材料；制备钛酸钡系陶瓷材料并进行Curie‑Weiss拟合；对钛酸钡系陶瓷材料进行分析，找到钛酸钡系陶瓷材料的单斜相、正交相和菱形相的多相共存区域，当有钛酸钡系陶瓷材料同时具备弛豫特性和多相共存区域，此时对应弛豫相变点和三临界点的钛酸钡系陶瓷材料组成成分即为三弛豫态铁电陶瓷材料。本发明在铁电陶瓷材料领域具有普遍性。
Method for obtaining three-relaxation-state ferroelectric ceramic with wide temperature range and high dielectric constant
一种获得宽温域高介电常数的三弛豫态铁电陶瓷的方法
GAO JINGHUI (Autor:in) / LIU YONGBIN (Autor:in) / XU JINGZHE (Autor:in) / ZHONG LISHENG (Autor:in)
23.07.2021
Patent
Elektronische Ressource
Chinesisch
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