Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Silicon carbide ceramic slurry with high solid content and low viscosity as well as preparation method and application of silicon carbide ceramic slurry
The invention relates to the technical field of ceramic materials, in particular to high-solid-content and low-viscosity silicon carbide ceramic slurry as well as a preparation method and application thereof. The silicon carbide ceramic slurry comprises the following components: aluminum salt modified alpha-SiC powder and a dispersing agent, wherein the dispersing agent comprises tetramethylammonium hydroxide, ethylene glycol and isopropanol. The modified alpha-SiC powder is better in hydrophilicity, the zeta potential on the surface of the modified alpha-SiC powder is negative, tetramethylammonium hydroxide can be ionized in water, generated OH <-> provides a strong alkaline environment for a solution, the surface negative charge amount of the modified alpha-SiC powder is greatly increased, the Zeta negative potential on the surface is increased, and the surface performance of the modified alpha-SiC powder is improved. And agglomeration of the alpha-SiC powder is prevented. Meanwhile, hydroxyl groups in ethylene glycol and isopropanol molecules can form hydrogen bonds or Van der Waals force with the surface of the alpha-SiC powder so as to be adsorbed on the surfaces of particles, and steric hindrance is formed to prevent aggregation and precipitation of the powder. Therefore, the silicon carbide ceramic slurry with high solid content, low viscosity and stable performance is obtained.
本发明涉及陶瓷材料技术领域，具体涉及一种高固含量、低粘度的碳化硅陶瓷浆料及其制备方法与应用。碳化硅陶瓷浆料的组分包括：铝盐改性的α‑SiC粉体以及分散剂，其中分散剂包括四甲基氢氧化铵、乙二醇以及异丙醇。改性后的α‑SiC粉体其亲水性更好，且改性后的α‑SiC粉体表面的zeta电位为负，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，大幅度地增加了改性后的α‑SiC粉体表面负电荷量，提高了表面的Zeta负电位，阻止了α‑SiC粉体的团聚。同时，乙二醇和异丙醇分子中的羟基可以与α‑SiC粉体表面形成氢键或范德华力从而吸附在颗粒表面，形成空间位阻防止粉体聚集和沉淀。因此获得高固含量且低粘度、性能稳定的碳化硅陶瓷浆料。
Silicon carbide ceramic slurry with high solid content and low viscosity as well as preparation method and application of silicon carbide ceramic slurry
The invention relates to the technical field of ceramic materials, in particular to high-solid-content and low-viscosity silicon carbide ceramic slurry as well as a preparation method and application thereof. The silicon carbide ceramic slurry comprises the following components: aluminum salt modified alpha-SiC powder and a dispersing agent, wherein the dispersing agent comprises tetramethylammonium hydroxide, ethylene glycol and isopropanol. The modified alpha-SiC powder is better in hydrophilicity, the zeta potential on the surface of the modified alpha-SiC powder is negative, tetramethylammonium hydroxide can be ionized in water, generated OH <-> provides a strong alkaline environment for a solution, the surface negative charge amount of the modified alpha-SiC powder is greatly increased, the Zeta negative potential on the surface is increased, and the surface performance of the modified alpha-SiC powder is improved. And agglomeration of the alpha-SiC powder is prevented. Meanwhile, hydroxyl groups in ethylene glycol and isopropanol molecules can form hydrogen bonds or Van der Waals force with the surface of the alpha-SiC powder so as to be adsorbed on the surfaces of particles, and steric hindrance is formed to prevent aggregation and precipitation of the powder. Therefore, the silicon carbide ceramic slurry with high solid content, low viscosity and stable performance is obtained.
本发明涉及陶瓷材料技术领域，具体涉及一种高固含量、低粘度的碳化硅陶瓷浆料及其制备方法与应用。碳化硅陶瓷浆料的组分包括：铝盐改性的α‑SiC粉体以及分散剂，其中分散剂包括四甲基氢氧化铵、乙二醇以及异丙醇。改性后的α‑SiC粉体其亲水性更好，且改性后的α‑SiC粉体表面的zeta电位为负，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，大幅度地增加了改性后的α‑SiC粉体表面负电荷量，提高了表面的Zeta负电位，阻止了α‑SiC粉体的团聚。同时，乙二醇和异丙醇分子中的羟基可以与α‑SiC粉体表面形成氢键或范德华力从而吸附在颗粒表面，形成空间位阻防止粉体聚集和沉淀。因此获得高固含量且低粘度、性能稳定的碳化硅陶瓷浆料。
Silicon carbide ceramic slurry with high solid content and low viscosity as well as preparation method and application of silicon carbide ceramic slurry
一种高固含量、低粘度的碳化硅陶瓷浆料及其制备方法与应用
BI JIANQIANG (Autor:in) / LIU LINTAO (Autor:in) / BIE SHOULIANG (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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Low-viscosity silicon carbide ceramic slurry as well as preparation method and application thereof
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