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Preparation method for preparing silicon carbide ceramic through pressureless sintering
The invention relates to the technical field of ceramic preparation, in particular to a method for preparing silicon carbide ceramic through pressureless sintering, which comprises the following steps: mixing silicon carbide powder, a sintering aid and a binder, adding a solvent, uniformly stirring to form slurry, carrying out spray drying and extrusion molding to prepare a green body, and carrying out primary sintering on the green body at a preset primary sintering temperature to obtain the silicon carbide ceramic. S3, performing crushing strength test on the blank sample to calculate sintering characterization parameters, judging whether primary sintering is sufficient or not, and selecting a processing strategy for the blank subjected to primary sintering according to a judgment result, namely repeating the step S3, determining the sintering duration according to the sintering characterization parameters, or performing secondary sintering at a preset secondary sintering temperature, according to the method disclosed by the invention, the performance of the green body sintered in each step of the two-step sintering method is detected, so that the ceramic preparation process is reliably controlled, and the quality of the silicon carbide ceramic is improved.
本发明涉及陶瓷制备技术领域，尤其涉及一种无压烧结制备碳化硅陶瓷的制备方法，本发明通过将碳化硅粉、烧结助剂、粘结剂混合，加入溶剂搅拌均匀形成浆料，通过喷雾干燥，挤出成型制成坯体，坯体在预设一次烧结温度下进行一次烧结，对坯体样本进行压碎强度测试计算烧结表征参量，判定一次烧结是否充分，根据判定结果选取对一次烧结完成坯体的加工策略，包括，重复步骤S3，根据烧结表征参量确定烧结时长，或，在预设二次烧结温度下进行二次烧结，获取二次烧结完成的坯体样本计算陶瓷质量表征参量，判定碳化硅陶瓷制备是否符合标准，本发明通过对两步烧结法的每一步烧结完成后的坯体进行性能检测，从而可靠把控陶瓷制备进程，提升碳化硅陶瓷质量。
Preparation method for preparing silicon carbide ceramic through pressureless sintering
The invention relates to the technical field of ceramic preparation, in particular to a method for preparing silicon carbide ceramic through pressureless sintering, which comprises the following steps: mixing silicon carbide powder, a sintering aid and a binder, adding a solvent, uniformly stirring to form slurry, carrying out spray drying and extrusion molding to prepare a green body, and carrying out primary sintering on the green body at a preset primary sintering temperature to obtain the silicon carbide ceramic. S3, performing crushing strength test on the blank sample to calculate sintering characterization parameters, judging whether primary sintering is sufficient or not, and selecting a processing strategy for the blank subjected to primary sintering according to a judgment result, namely repeating the step S3, determining the sintering duration according to the sintering characterization parameters, or performing secondary sintering at a preset secondary sintering temperature, according to the method disclosed by the invention, the performance of the green body sintered in each step of the two-step sintering method is detected, so that the ceramic preparation process is reliably controlled, and the quality of the silicon carbide ceramic is improved.
本发明涉及陶瓷制备技术领域，尤其涉及一种无压烧结制备碳化硅陶瓷的制备方法，本发明通过将碳化硅粉、烧结助剂、粘结剂混合，加入溶剂搅拌均匀形成浆料，通过喷雾干燥，挤出成型制成坯体，坯体在预设一次烧结温度下进行一次烧结，对坯体样本进行压碎强度测试计算烧结表征参量，判定一次烧结是否充分，根据判定结果选取对一次烧结完成坯体的加工策略，包括，重复步骤S3，根据烧结表征参量确定烧结时长，或，在预设二次烧结温度下进行二次烧结，获取二次烧结完成的坯体样本计算陶瓷质量表征参量，判定碳化硅陶瓷制备是否符合标准，本发明通过对两步烧结法的每一步烧结完成后的坯体进行性能检测，从而可靠把控陶瓷制备进程，提升碳化硅陶瓷质量。
Preparation method for preparing silicon carbide ceramic through pressureless sintering
一种无压烧结制备碳化硅陶瓷的制备方法
DONG SHICHANG (author)
2024-11-19
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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