Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing oriented porous SiC ceramic by using coal slime as pore-forming agent
The invention discloses a method for preparing oriented porous SiC ceramics by using coal slime as a pore-forming agent, and belongs to the technical field of porous ceramics. The preparation method comprises the following steps: by taking SiC powder as a raw material, adding coal slime with different contents as a pore-forming agent, carrying out wet-process mixing, carrying out dry-pressing molding to obtain a green body, and drying and sintering the green body to obtain the oriented porous SiC ceramic. According to the invention, the coal slime is used as a pore-forming agent, and in the process of heating to a re-sintering temperature, porous carbon formed in the coal slime supplements carbon loss caused by other pore-forming agents, so that the relative density is improved. And the low-melting-point volatile substance and SiC generated by reaction can promote the formation of directional pores, so that a smooth columnar structure is formed. The raw materials are easy to obtain, the cost is low, and the manufacturing process is simple. The prepared porous ceramic has the characteristic of directional distribution of pores, and has relatively high relative density and axial breaking strength.
本发明公开了一种采用煤泥作为造孔剂制备定向多孔SiC陶瓷方法，属于多孔陶瓷技术领域。采用SiC粉料作为原料，添加不同含量煤泥作为造孔剂，经湿法混料后经干压成型得到坯体，将坯体干燥、烧结后得到定向多孔SiC陶瓷。本发明采用煤泥作为造孔剂，升温至重烧结温度过程中，煤泥内部形成的多孔碳补充了其他造孔剂造成的碳缺失，促进了相对密度的提高。低熔点挥发性物质和反应生成的SiC可以促进定向多孔形成，形成光滑柱状组织。本发明原料易得、成本低，制造工艺简单。制得的多孔陶瓷具有气孔定向分布特征，具有较高相对密度和轴向抗折强度。
Method for preparing oriented porous SiC ceramic by using coal slime as pore-forming agent
The invention discloses a method for preparing oriented porous SiC ceramics by using coal slime as a pore-forming agent, and belongs to the technical field of porous ceramics. The preparation method comprises the following steps: by taking SiC powder as a raw material, adding coal slime with different contents as a pore-forming agent, carrying out wet-process mixing, carrying out dry-pressing molding to obtain a green body, and drying and sintering the green body to obtain the oriented porous SiC ceramic. According to the invention, the coal slime is used as a pore-forming agent, and in the process of heating to a re-sintering temperature, porous carbon formed in the coal slime supplements carbon loss caused by other pore-forming agents, so that the relative density is improved. And the low-melting-point volatile substance and SiC generated by reaction can promote the formation of directional pores, so that a smooth columnar structure is formed. The raw materials are easy to obtain, the cost is low, and the manufacturing process is simple. The prepared porous ceramic has the characteristic of directional distribution of pores, and has relatively high relative density and axial breaking strength.
本发明公开了一种采用煤泥作为造孔剂制备定向多孔SiC陶瓷方法，属于多孔陶瓷技术领域。采用SiC粉料作为原料，添加不同含量煤泥作为造孔剂，经湿法混料后经干压成型得到坯体，将坯体干燥、烧结后得到定向多孔SiC陶瓷。本发明采用煤泥作为造孔剂，升温至重烧结温度过程中，煤泥内部形成的多孔碳补充了其他造孔剂造成的碳缺失，促进了相对密度的提高。低熔点挥发性物质和反应生成的SiC可以促进定向多孔形成，形成光滑柱状组织。本发明原料易得、成本低，制造工艺简单。制得的多孔陶瓷具有气孔定向分布特征，具有较高相对密度和轴向抗折强度。
Method for preparing oriented porous SiC ceramic by using coal slime as pore-forming agent
一种采用煤泥作为造孔剂制备定向多孔SiC陶瓷方法
ZHANG GENG (Autor:in) / BAI JIANGUANG (Autor:in) / HUANG RUI (Autor:in) / HE TIANYING (Autor:in) / LIANG LIDONG (Autor:in) / HUANG CHUANQING (Autor:in) / WANG RUNXING (Autor:in)
08.03.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
Method for preparing high-strength porous composite ceramic from coal slime
| Europäisches Patentamt | 2023
Method for preparing Al2O3-SiC composite ceramic from coal slime
| Europäisches Patentamt | 2021
Method for preparing porous alumina ceramic through sucrose pore-forming
| Europäisches Patentamt | 2023
Porous ceramic material pore-forming agent and preparation method thereof
| Europäisches Patentamt | 2021
| Europäisches Patentamt | 2015