A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Wide temperature stable barium titanate-based dielectric ceramic material and preparation method thereof
The invention belongs to the technical field of ceramic materials, and discloses a wide temperature stable barium titanate-based dielectric ceramic material and a preparation method thereof, the chemical formula of the dielectric ceramic material is 0.9 BaTiO<3>-0.1 Bi (ZnMg<0.5-x>Y<0.5>) O<0.275>, and x is greater than or equal to 0.1 and less than or equal to 0.3; the preparation method comprises the following steps: preparing BaTiO3, Bi2O3, ZnO, MgO and Y2O3, mixing, and carrying out ball milling; drying the ball-milled raw materials, sieving, pre-sintering at 900 DEG C for 2 hours, and mixing and ball-milling the pre-sintered powder; drying and sieving the raw materials obtained after ball milling, adding a binder into the obtained powder, granulating, sieving, pressing into a blank, sintering the blank at 1250 DEG C, and keeping the temperature for 2 hours to obtain a final sample. A site is replaced by donor ions Bi < 3 + >, B site is replaced by acceptor ions Mg < 2 + >, migration of free carriers in crystal grains is bound by defective dipoles, and the purpose of improving the dielectric property of the material is achieved; and meanwhile, the core-shell distribution of the crystal grains is influenced by different diffusion rates of ions in the crystal grains, a capacitance-temperature change curve is slowed down, and the wide temperature stability of the material is realized.
本发明属于陶瓷材料技术领域，公开了一种宽温度稳定型钛酸钡基介质陶瓷材料及其制备方法，其化学式为0.9BaTiO3‑0.1Bi(ZnxMg0.5‑xY0.5)O0.275，0.1≤x≤0.3；其制备方法为将BaTiO3、Bi2O3、ZnO、MgO、Y2O3配料后混合球磨；球磨后所得原料烘干、过筛、900℃下预烧2h，预烧后的粉料混合球磨；球磨后所得原料烘干、过筛，所得粉料添加粘结剂造粒，过筛压制成胚体，胚体在1250℃下烧结，保温2h得到最终样品。本发明通过施主离子Bi3+取代A位、受主离子Mg2+取代B位，产生缺陷偶极子束缚晶粒中自由载流子的迁移，达到改善材料介电性能的目的；同时，通过离子在晶粒中的不同扩散速率影响晶粒“芯‑壳”分布，平缓容温变化曲线，实现材料的宽温度稳定性。
Wide temperature stable barium titanate-based dielectric ceramic material and preparation method thereof
The invention belongs to the technical field of ceramic materials, and discloses a wide temperature stable barium titanate-based dielectric ceramic material and a preparation method thereof, the chemical formula of the dielectric ceramic material is 0.9 BaTiO<3>-0.1 Bi (ZnMg<0.5-x>Y<0.5>) O<0.275>, and x is greater than or equal to 0.1 and less than or equal to 0.3; the preparation method comprises the following steps: preparing BaTiO3, Bi2O3, ZnO, MgO and Y2O3, mixing, and carrying out ball milling; drying the ball-milled raw materials, sieving, pre-sintering at 900 DEG C for 2 hours, and mixing and ball-milling the pre-sintered powder; drying and sieving the raw materials obtained after ball milling, adding a binder into the obtained powder, granulating, sieving, pressing into a blank, sintering the blank at 1250 DEG C, and keeping the temperature for 2 hours to obtain a final sample. A site is replaced by donor ions Bi < 3 + >, B site is replaced by acceptor ions Mg < 2 + >, migration of free carriers in crystal grains is bound by defective dipoles, and the purpose of improving the dielectric property of the material is achieved; and meanwhile, the core-shell distribution of the crystal grains is influenced by different diffusion rates of ions in the crystal grains, a capacitance-temperature change curve is slowed down, and the wide temperature stability of the material is realized.
本发明属于陶瓷材料技术领域，公开了一种宽温度稳定型钛酸钡基介质陶瓷材料及其制备方法，其化学式为0.9BaTiO3‑0.1Bi(ZnxMg0.5‑xY0.5)O0.275，0.1≤x≤0.3；其制备方法为将BaTiO3、Bi2O3、ZnO、MgO、Y2O3配料后混合球磨；球磨后所得原料烘干、过筛、900℃下预烧2h，预烧后的粉料混合球磨；球磨后所得原料烘干、过筛，所得粉料添加粘结剂造粒，过筛压制成胚体，胚体在1250℃下烧结，保温2h得到最终样品。本发明通过施主离子Bi3+取代A位、受主离子Mg2+取代B位，产生缺陷偶极子束缚晶粒中自由载流子的迁移，达到改善材料介电性能的目的；同时，通过离子在晶粒中的不同扩散速率影响晶粒“芯‑壳”分布，平缓容温变化曲线，实现材料的宽温度稳定性。
Wide temperature stable barium titanate-based dielectric ceramic material and preparation method thereof
一种宽温度稳定型钛酸钡基介质陶瓷材料及其制备方法
LI LINGXIA (author) / WANG MENGLONG (author) / XIE JIALING (author) / XUE KEYING (author)
2021-08-17
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2021
| European Patent Office | 2022
| European Patent Office | 2016
| European Patent Office | 2024
| European Patent Office | 2024