Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-viscosity silicon carbide ceramic slurry as well as preparation method and application thereof
The invention relates to the technical field of ceramic materials, in particular to low-viscosity silicon carbide ceramic slurry as well as a preparation method and application thereof. The silicon carbide ceramic slurry comprises modified alpha-SiC powder and a dispersing agent, wherein the dispersing agent comprises tetramethylammonium hydroxide or a composition of tetramethylammonium hydroxide and octadecylamine polyoxyethylene ether. The powder modified by Al (NO3) 3 and sodium humate has better hydrophilicity, the zeta potential of the surface is negative, and sodium humate can be adsorbed on the surface of alpha-SiC powder to form steric hindrance to prevent aggregation and precipitation of the powder; the tetramethylammonium hydroxide is ionized in water, and generated OH <-> provides a strong alkaline environment for the solution, so that the Zeta negative potential on the surface is improved, and the agglomeration of the alpha-SiC powder is prevented. When octadecylamine polyoxyethylene ether is added, the octadecylamine polyoxyethylene ether can also be adsorbed on the surface of the alpha-SiC powder to form steric hindrance to prevent the powder from gathering and precipitating, so that the silicon carbide ceramic slurry with high solid content, low viscosity and stable performance can be obtained.
本发明涉及陶瓷材料技术领域，具体涉及一种低粘度的碳化硅陶瓷浆料及其制备方法与应用。碳化硅陶瓷浆料包括：改性的α‑SiC粉体以及分散剂，其中分散剂包括四甲基氢氧化铵或四甲基氢氧化铵与十八胺聚氧乙烯醚的组合物。利用Al(NO3)3和腐殖酸钠改性后的粉体亲水性更好，且表面的zeta电位为负，腐殖酸钠会吸附在α‑SiC粉体表面，形成空间位阻防止粉体聚集和沉淀；四甲基氢氧化铵在水中会发生电离，生成的OH‑为溶液提供强碱性的环境，提高了表面的Zeta负电位，阻止了α‑SiC粉体的团聚。当加入十八胺聚氧乙烯醚时，其也会吸附在α‑SiC粉体表面，形成空间位阻防止粉体聚集和沉淀，因此可以获得高固含量且低粘度、性能稳定的碳化硅陶瓷浆料。
Low-viscosity silicon carbide ceramic slurry as well as preparation method and application thereof
The invention relates to the technical field of ceramic materials, in particular to low-viscosity silicon carbide ceramic slurry as well as a preparation method and application thereof. The silicon carbide ceramic slurry comprises modified alpha-SiC powder and a dispersing agent, wherein the dispersing agent comprises tetramethylammonium hydroxide or a composition of tetramethylammonium hydroxide and octadecylamine polyoxyethylene ether. The powder modified by Al (NO3) 3 and sodium humate has better hydrophilicity, the zeta potential of the surface is negative, and sodium humate can be adsorbed on the surface of alpha-SiC powder to form steric hindrance to prevent aggregation and precipitation of the powder; the tetramethylammonium hydroxide is ionized in water, and generated OH <-> provides a strong alkaline environment for the solution, so that the Zeta negative potential on the surface is improved, and the agglomeration of the alpha-SiC powder is prevented. When octadecylamine polyoxyethylene ether is added, the octadecylamine polyoxyethylene ether can also be adsorbed on the surface of the alpha-SiC powder to form steric hindrance to prevent the powder from gathering and precipitating, so that the silicon carbide ceramic slurry with high solid content, low viscosity and stable performance can be obtained.
本发明涉及陶瓷材料技术领域，具体涉及一种低粘度的碳化硅陶瓷浆料及其制备方法与应用。碳化硅陶瓷浆料包括：改性的α‑SiC粉体以及分散剂，其中分散剂包括四甲基氢氧化铵或四甲基氢氧化铵与十八胺聚氧乙烯醚的组合物。利用Al(NO3)3和腐殖酸钠改性后的粉体亲水性更好，且表面的zeta电位为负，腐殖酸钠会吸附在α‑SiC粉体表面，形成空间位阻防止粉体聚集和沉淀；四甲基氢氧化铵在水中会发生电离，生成的OH‑为溶液提供强碱性的环境，提高了表面的Zeta负电位，阻止了α‑SiC粉体的团聚。当加入十八胺聚氧乙烯醚时，其也会吸附在α‑SiC粉体表面，形成空间位阻防止粉体聚集和沉淀，因此可以获得高固含量且低粘度、性能稳定的碳化硅陶瓷浆料。
Low-viscosity silicon carbide ceramic slurry as well as preparation method and application thereof
一种低粘度的碳化硅陶瓷浆料及其制备方法与应用
BI JIANQIANG (Autor:in) / BIE SHOULIANG (Autor:in) / LIU LINTAO (Autor:in) / LIANG GUANDONG (Autor:in) / YANG YAO (Autor:in) / WANG LU (Autor:in)
20.12.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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