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Microwave sintering method of BN-ZrO2-SiC composite ceramic
The invention discloses a microwave sintering method of BN-ZrO2-SiC composite ceramic, and belongs to the field of ceramic microwave sintering. The microwave sintering method comprises the following steps: 1) mixing boron nitride powder, zirconium oxide powder and silicon carbide powder, carrying out ball milling, and then sieving to obtain mixed powder; 2) mixing the mixed powder and a sintering aid, performing dry-pressing pre-forming, and performing cold isostatic pressing pre-forming on a dry-pressing pre-formed green body to obtain a green body; and 3) carrying out microwave heating on the green body to prepare the BN-ZrO2-SiC composite ceramic. The method is characterized in that the densification of the ceramic can be effectively promoted by utilizing the microwave plasma effect and the electric field driving atomic diffusion mechanism existing in the microwave heating process, the in-situ generated zirconium diboride is excellent in performance and uniform in distribution, and the performance of the ceramic product can be greatly improved.
本发明公开了一种BN‑ZrO2‑SiC复相陶瓷的微波烧结方法，属于陶瓷微波烧结领域。所述微波烧结方法包括如下步骤：1)将氮化硼粉末、氧化锆粉末和碳化硅粉末混合并进行球磨，然后过筛得到混合粉料；2)将混合粉料和助烧剂混合后进行干压预成型，随后将干压预成型的坯体进行冷等静压预成型，得到生坯体；3)将生坯体进行微波加热，制备得到BN‑ZrO2‑SiC复相陶瓷。本发明的特征在于利用微波加热过程中存在的微波等离子体效应和电场驱动原子扩散机制，能够有效促进陶瓷的致密化，原位生成的二硼化锆性能优异，且分布均匀，能够极大提高陶瓷制品的性能。
Microwave sintering method of BN-ZrO2-SiC composite ceramic
The invention discloses a microwave sintering method of BN-ZrO2-SiC composite ceramic, and belongs to the field of ceramic microwave sintering. The microwave sintering method comprises the following steps: 1) mixing boron nitride powder, zirconium oxide powder and silicon carbide powder, carrying out ball milling, and then sieving to obtain mixed powder; 2) mixing the mixed powder and a sintering aid, performing dry-pressing pre-forming, and performing cold isostatic pressing pre-forming on a dry-pressing pre-formed green body to obtain a green body; and 3) carrying out microwave heating on the green body to prepare the BN-ZrO2-SiC composite ceramic. The method is characterized in that the densification of the ceramic can be effectively promoted by utilizing the microwave plasma effect and the electric field driving atomic diffusion mechanism existing in the microwave heating process, the in-situ generated zirconium diboride is excellent in performance and uniform in distribution, and the performance of the ceramic product can be greatly improved.
本发明公开了一种BN‑ZrO2‑SiC复相陶瓷的微波烧结方法，属于陶瓷微波烧结领域。所述微波烧结方法包括如下步骤：1)将氮化硼粉末、氧化锆粉末和碳化硅粉末混合并进行球磨，然后过筛得到混合粉料；2)将混合粉料和助烧剂混合后进行干压预成型，随后将干压预成型的坯体进行冷等静压预成型，得到生坯体；3)将生坯体进行微波加热，制备得到BN‑ZrO2‑SiC复相陶瓷。本发明的特征在于利用微波加热过程中存在的微波等离子体效应和电场驱动原子扩散机制，能够有效促进陶瓷的致密化，原位生成的二硼化锆性能优异，且分布均匀，能够极大提高陶瓷制品的性能。
Microwave sintering method of BN-ZrO2-SiC composite ceramic
一种BN-ZrO2-SiC复相陶瓷的微波烧结方法
CHEN YONGQIANG (Autor:in) / QIAN FAN (Autor:in) / QI YONGSHUN (Autor:in) / WANG HAILONG (Autor:in) / FAN BINGBING (Autor:in) / SHAO GANG (Autor:in) / ZHANG RUI (Autor:in) / LI HONGXIA (Autor:in) / LIU GUOQI (Autor:in) / SONG ZIJIE (Autor:in)
09.12.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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