A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention discloses a preparation method of copper calcium titanate (CaCu3Ti4O12, CCTO for short) ceramic, which is used for solving the technical problem that the dielectric loss is higher when the CCTO ceramic is prepared in the prior art. According to the technical scheme, a CCTO ceramic blank is subjected to a heating stage 1, a heat preservation stage 1, a heating stage 2 and a heat preservation stage 2 in a sintering furnace to obtain a high-temperature ceramic sintered body, and then the high-temperature ceramic sintered body is subjected to a gas-phase quenching cooling stage in anoxygen-rich mixed gas atmosphere to finally complete sintering of the CCTO ceramic. According to the technical scheme, the operation process is simple, the process window is wide, the dielectric lossof the obtained CCTO ceramic is low, and the temperature stability of the dielectric constant is high. Meanwhile, according to the technical scheme, the cooling time of a CCTO green body in the ceramic firing process is obviously shortened, and the firing time of the CCTO ceramic is remarkably shortened.
本发明公开了一种钛酸铜钙（CaCu3Ti4O12，简称CCTO）陶瓷的制备方法，用以解决现有技术制备CCTO陶瓷时介电损耗较高的技术问题。本发明的技术方案是：所述CCTO陶瓷坯体首先在烧结炉中经过升温阶段1、保温阶段1、升温阶段2、保温阶段2后得到高温陶瓷烧结体，然后所述高温陶瓷烧结体再经过富含氧气的混合气体气氛下的气相淬火冷却阶段后而最终完成CCTO陶瓷的烧成。本发明的技术方案操作工艺简单，工艺窗口宽，所得CCTO陶瓷的介电损耗低、介电常数的温度稳定性高。同时，本发明技术方案中CCTO坯体在烧成陶瓷过程中的降温冷却时间明显减小，显著缩短了CCTO陶瓷的烧成时间。
The invention discloses a preparation method of copper calcium titanate (CaCu3Ti4O12, CCTO for short) ceramic, which is used for solving the technical problem that the dielectric loss is higher when the CCTO ceramic is prepared in the prior art. According to the technical scheme, a CCTO ceramic blank is subjected to a heating stage 1, a heat preservation stage 1, a heating stage 2 and a heat preservation stage 2 in a sintering furnace to obtain a high-temperature ceramic sintered body, and then the high-temperature ceramic sintered body is subjected to a gas-phase quenching cooling stage in anoxygen-rich mixed gas atmosphere to finally complete sintering of the CCTO ceramic. According to the technical scheme, the operation process is simple, the process window is wide, the dielectric lossof the obtained CCTO ceramic is low, and the temperature stability of the dielectric constant is high. Meanwhile, according to the technical scheme, the cooling time of a CCTO green body in the ceramic firing process is obviously shortened, and the firing time of the CCTO ceramic is remarkably shortened.
本发明公开了一种钛酸铜钙（CaCu3Ti4O12，简称CCTO）陶瓷的制备方法，用以解决现有技术制备CCTO陶瓷时介电损耗较高的技术问题。本发明的技术方案是：所述CCTO陶瓷坯体首先在烧结炉中经过升温阶段1、保温阶段1、升温阶段2、保温阶段2后得到高温陶瓷烧结体，然后所述高温陶瓷烧结体再经过富含氧气的混合气体气氛下的气相淬火冷却阶段后而最终完成CCTO陶瓷的烧成。本发明的技术方案操作工艺简单，工艺窗口宽，所得CCTO陶瓷的介电损耗低、介电常数的温度稳定性高。同时，本发明技术方案中CCTO坯体在烧成陶瓷过程中的降温冷却时间明显减小，显著缩短了CCTO陶瓷的烧成时间。
Sintering method of copper calcium titanate ceramic with high dielectric constant and low dielectric loss
一种高介电常数低介电损耗钛酸铜钙陶瓷的烧结方法
2021-04-02
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2023
High-dielectric low-loss doped barium calcium titanate ceramic and preparation method thereof
| European Patent Office | 2022
Giant dielectric constant strontium titanate dielectric ceramic and preparation method thereof
| European Patent Office | 2021
| European Patent Office | 2022
| European Patent Office | 2022