A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention belongs to the field of recrystallized silicon carbide product forming, and particularly relates to a recrystallized silicon carbide product forming and sintering process. The process comprises the following steps: mixing, by weight, 20-50 parts of fine SiC powder and 80-50 parts of coarse SiC particles to obtain a mixture; adding a proper amount of deionized water into the mixture, and adding a dispersing agent which is 0-0.6% of the mass of the mixture; performing slip casting on the slurry; and sintering the SiC green body in a sintering furnace to obtain a recrystallized silicon carbide product. The solid phase content can be controlled between 60% and 69%, the distance between SiC particles is reduced, fine SiC powder can fill pores through short-distance movement in the slip casting and water loss process, the density is improved, the generated pores are uniformly distributed, the relatively high green body density can be obtained, the particles of the green body are uniformly stacked, the porosity is relatively small, the recrystallized silicon carbide product has high density, and the crystallized silicon carbide product has high performance.
本发明属于重结晶碳化硅制品成型领域，尤其涉及重结晶碳化硅制品成型及烧结工艺，包括以下步骤：将如下重量份的原料混合：细SiC粉末20‑50份，粗SiC颗粒80‑50份，以获得混合料；把混合料加入适量的去离子水，添加混合料质量的0％‑0.6％的分散剂；将浆料注浆成型；将SiC坯体放入烧结炉内烧结，得到重结晶碳化硅制品。本发明能够把固相含量控制在60％‑69％之间，减小SiC颗粒之间的距离，在注浆成型失水的过程中，细SiC粉末能够通过短距离移动填充孔隙，使致密度提高，产生的孔隙分布均匀，能获得较高的坯体密度，坯体的颗粒堆积均匀，孔隙率较小，重结晶碳化硅制品的密度大，结晶碳化硅制品的性能较高。
The invention belongs to the field of recrystallized silicon carbide product forming, and particularly relates to a recrystallized silicon carbide product forming and sintering process. The process comprises the following steps: mixing, by weight, 20-50 parts of fine SiC powder and 80-50 parts of coarse SiC particles to obtain a mixture; adding a proper amount of deionized water into the mixture, and adding a dispersing agent which is 0-0.6% of the mass of the mixture; performing slip casting on the slurry; and sintering the SiC green body in a sintering furnace to obtain a recrystallized silicon carbide product. The solid phase content can be controlled between 60% and 69%, the distance between SiC particles is reduced, fine SiC powder can fill pores through short-distance movement in the slip casting and water loss process, the density is improved, the generated pores are uniformly distributed, the relatively high green body density can be obtained, the particles of the green body are uniformly stacked, the porosity is relatively small, the recrystallized silicon carbide product has high density, and the crystallized silicon carbide product has high performance.
本发明属于重结晶碳化硅制品成型领域，尤其涉及重结晶碳化硅制品成型及烧结工艺，包括以下步骤：将如下重量份的原料混合：细SiC粉末20‑50份，粗SiC颗粒80‑50份，以获得混合料；把混合料加入适量的去离子水，添加混合料质量的0％‑0.6％的分散剂；将浆料注浆成型；将SiC坯体放入烧结炉内烧结，得到重结晶碳化硅制品。本发明能够把固相含量控制在60％‑69％之间，减小SiC颗粒之间的距离，在注浆成型失水的过程中，细SiC粉末能够通过短距离移动填充孔隙，使致密度提高，产生的孔隙分布均匀，能获得较高的坯体密度，坯体的颗粒堆积均匀，孔隙率较小，重结晶碳化硅制品的密度大，结晶碳化硅制品的性能较高。
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