Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Sintering process of high-strength injection-molded zirconia ceramic
The invention discloses a sintering process of high-strength injection-molded zirconia ceramic. The preparation method comprises the following steps: by taking nano zirconium oxide powder as a raw material, adding a coupling agent, mixing, stirring and drying to obtain modified zirconium oxide powder, carrying out injection molding to obtain a green body, degreasing, and carrying out high-low temperature composite two-stage sintering in air to obtain the high-strength injection-molded zirconium oxide ceramic. According to the invention, nano zirconia powder is modified by a coupling agent, a two-stage sintering process is cooperated and compounded, an injection molded blank is heated to a high temperature within a short time, zirconia ceramic is subjected to first-stage sintering and rapid densification, and then the sintering temperature is reduced to a low temperature for long-time sintering, so that the high-density zirconia ceramic is obtained. The abnormal growth of the crystal grains is inhibited, the microstructure uniformity of the material is kept, and the bending strength of the final ceramic body is improved.
本发明公开一种高强度注射成型氧化锆陶瓷的烧结工艺。以纳米氧化锆粉体为原料，加入偶联剂，混合搅拌烘干后得到改性氧化锆粉体，再注射成型制得坯体，经脱脂后，在空气中采用高低温复合二段烧结得到高强度注射成型氧化锆陶瓷。本发明通过偶联剂改性纳米氧化锆粉体，协同复合二段烧结工艺，通过在较短的时间内将注射成型坯体升至较高温度，使氧化锆陶瓷进行第一段烧结快速致密化，然后再将烧结温度降低至较低的温度进行长时间烧结，使晶粒生长完整并抑制晶粒异常生长，保持材料的微观结构均匀性，提高最终陶瓷体的弯曲强度。
Sintering process of high-strength injection-molded zirconia ceramic
The invention discloses a sintering process of high-strength injection-molded zirconia ceramic. The preparation method comprises the following steps: by taking nano zirconium oxide powder as a raw material, adding a coupling agent, mixing, stirring and drying to obtain modified zirconium oxide powder, carrying out injection molding to obtain a green body, degreasing, and carrying out high-low temperature composite two-stage sintering in air to obtain the high-strength injection-molded zirconium oxide ceramic. According to the invention, nano zirconia powder is modified by a coupling agent, a two-stage sintering process is cooperated and compounded, an injection molded blank is heated to a high temperature within a short time, zirconia ceramic is subjected to first-stage sintering and rapid densification, and then the sintering temperature is reduced to a low temperature for long-time sintering, so that the high-density zirconia ceramic is obtained. The abnormal growth of the crystal grains is inhibited, the microstructure uniformity of the material is kept, and the bending strength of the final ceramic body is improved.
本发明公开一种高强度注射成型氧化锆陶瓷的烧结工艺。以纳米氧化锆粉体为原料，加入偶联剂，混合搅拌烘干后得到改性氧化锆粉体，再注射成型制得坯体，经脱脂后，在空气中采用高低温复合二段烧结得到高强度注射成型氧化锆陶瓷。本发明通过偶联剂改性纳米氧化锆粉体，协同复合二段烧结工艺，通过在较短的时间内将注射成型坯体升至较高温度，使氧化锆陶瓷进行第一段烧结快速致密化，然后再将烧结温度降低至较低的温度进行长时间烧结，使晶粒生长完整并抑制晶粒异常生长，保持材料的微观结构均匀性，提高最终陶瓷体的弯曲强度。
Sintering process of high-strength injection-molded zirconia ceramic
一种高强度注射成型氧化锆陶瓷的烧结工艺
LIU PENG (Autor:in) / QIAO LIANG (Autor:in) / ZHENG JINGWU (Autor:in) / YING YAO (Autor:in) / CAI WEI (Autor:in) / LI JUAN (Autor:in) / YU LIANG (Autor:in) / CHE SHENGLEI (Autor:in) / LI WANGCHANG (Autor:in)
12.11.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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