Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Lost foam coating for casting molding of silicon carbide ceramic and preparation method for lost foam coating
The invention belongs to the technical field of silicon carbide ceramic materials, and discloses a lost foam coating for casting molding of silicon carbide ceramic. The lost foam coating comprises thefollowing raw material components in parts by mass: powder components: 10 to 20 parts of montmorillonite powder, 15 to 35 parts of gypsum powder, 20 to 35 parts of silicon carbide powder, 1 to 5 parts of talcum powder, 2 to 8 parts of silicon micropowder, 2 to 6 parts of silicon nitride powder and 0.25 to 1 part of boron nitride powder; and binding agent components: 10 to 30 parts of organic glue, 1 to 2 parts of yellow dextrin and 0.1 to 0.5 part of sodium silicate. According to the invention, a layer of a functional coating capable of tightly coating a lost foam (a foam inner core) can be formed; the coating has good hydrophilicity and water absorbability, can absorb moisture in a silicon carbide ceramic castable, effectively reduces generation of pores, shrinkage cavities, bubbles andlooseness on the inner surface of a formed blank; the functional coating also can exert the effect of isolation; and the lost foam (the foam inner core) is effectively prevented from being bonded withthe formed blank.
本发明属于碳化硅陶瓷材料技术领域，公开了一种碳化硅陶瓷浇注成型用消失模涂料，按质量份数计，原料包括以下组分，粉体组分：10‑20份蒙脱石粉、15‑35份石膏粉、20‑35份碳化硅粉、1‑5份滑石粉、2‑8份硅微粉、2‑6份氮化硅粉、0.25‑1份氮化硼粉；结合剂组分：10‑30份有机胶水、1‑2份黄糊精、0.1‑0.5份硅酸钠。能形成紧密包覆消失模(泡沫内芯)的一层功能涂层，此涂层具有较好的亲水性、吸水性，能吸收碳化硅陶瓷浇注料中的水分，有效减少成型坯体内表面气孔、缩孔、气泡和疏松的产生，功能涂层还起到隔离作用，有效防止消失模(泡沫内芯)与成型坯体粘接。
Lost foam coating for casting molding of silicon carbide ceramic and preparation method for lost foam coating
The invention belongs to the technical field of silicon carbide ceramic materials, and discloses a lost foam coating for casting molding of silicon carbide ceramic. The lost foam coating comprises thefollowing raw material components in parts by mass: powder components: 10 to 20 parts of montmorillonite powder, 15 to 35 parts of gypsum powder, 20 to 35 parts of silicon carbide powder, 1 to 5 parts of talcum powder, 2 to 8 parts of silicon micropowder, 2 to 6 parts of silicon nitride powder and 0.25 to 1 part of boron nitride powder; and binding agent components: 10 to 30 parts of organic glue, 1 to 2 parts of yellow dextrin and 0.1 to 0.5 part of sodium silicate. According to the invention, a layer of a functional coating capable of tightly coating a lost foam (a foam inner core) can be formed; the coating has good hydrophilicity and water absorbability, can absorb moisture in a silicon carbide ceramic castable, effectively reduces generation of pores, shrinkage cavities, bubbles andlooseness on the inner surface of a formed blank; the functional coating also can exert the effect of isolation; and the lost foam (the foam inner core) is effectively prevented from being bonded withthe formed blank.
本发明属于碳化硅陶瓷材料技术领域，公开了一种碳化硅陶瓷浇注成型用消失模涂料，按质量份数计，原料包括以下组分，粉体组分：10‑20份蒙脱石粉、15‑35份石膏粉、20‑35份碳化硅粉、1‑5份滑石粉、2‑8份硅微粉、2‑6份氮化硅粉、0.25‑1份氮化硼粉；结合剂组分：10‑30份有机胶水、1‑2份黄糊精、0.1‑0.5份硅酸钠。能形成紧密包覆消失模(泡沫内芯)的一层功能涂层，此涂层具有较好的亲水性、吸水性，能吸收碳化硅陶瓷浇注料中的水分，有效减少成型坯体内表面气孔、缩孔、气泡和疏松的产生，功能涂层还起到隔离作用，有效防止消失模(泡沫内芯)与成型坯体粘接。
Lost foam coating for casting molding of silicon carbide ceramic and preparation method for lost foam coating
一种碳化硅陶瓷浇注成型用消失模涂料及其制备方法
WANG HUIMIN (Autor:in) / LI QIUNAN (Autor:in) / ZHU XIZHONG (Autor:in) / ZHANG HANYI (Autor:in) / HUANG TAO (Autor:in) / GUO HUAIFENG (Autor:in) / WANG LIGONG (Autor:in) / ZHOU BO (Autor:in) / TONG JIE (Autor:in) / LI HONGMEI (Autor:in)
19.06.2020
Patent
Elektronische Ressource
Chinesisch
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