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High-purity silicon nitride ceramic and preparation method thereof
The invention belongs to the technical field of ceramic materials, and relates to high-purity silicon nitride ceramic and a preparation method thereof. According to the invention, magnesium oxide (MgO), barium oxide (BaO) and niobium oxide (Nb2O5) in a specific proportion are added, a MgO-BaO-Nb2O5 ternary liquid phase system is formed at a high temperature, and manganese oxide and vanadium oxide generate electricity price change at the high temperature, so that migration and diffusion among silicon nitride particles and activation of crystal lattices by the electricity price change are promoted, and the sintering density and the mechanical property are improved. A closed ball milling mode is adopted, ball milling is performed twice, multiple additives and solvents are added for the first time to ensure that powder is fully mixed, and maltose and a cross-linking agent are added for the second time to enhance the binding force between the powder and avoid caking.
本发明属于陶瓷材料技术领域，涉及一种高纯度氮化硅陶瓷及其制备方法及其制备方法。本发明通过添加特定比例的氧化镁(MgO)、氧化钡(BaO)和氧化铌(Nb2O5)，在高温下形成MgO‑BaO‑Nb2O5三元液相体系，氧化锰和氧化钒在高温时发生电价变化，以促进氮化硅颗粒间的迁移、扩散及电价变化活化晶格，提高烧结密度和机械性能。本发明采用封闭球磨方式，通过两次球磨，首次加入多种添加剂和溶剂以确保粉末充分混合，第二次加入麦芽糖和交联剂，以增强粉末间的结合力并避免结团。
High-purity silicon nitride ceramic and preparation method thereof
The invention belongs to the technical field of ceramic materials, and relates to high-purity silicon nitride ceramic and a preparation method thereof. According to the invention, magnesium oxide (MgO), barium oxide (BaO) and niobium oxide (Nb2O5) in a specific proportion are added, a MgO-BaO-Nb2O5 ternary liquid phase system is formed at a high temperature, and manganese oxide and vanadium oxide generate electricity price change at the high temperature, so that migration and diffusion among silicon nitride particles and activation of crystal lattices by the electricity price change are promoted, and the sintering density and the mechanical property are improved. A closed ball milling mode is adopted, ball milling is performed twice, multiple additives and solvents are added for the first time to ensure that powder is fully mixed, and maltose and a cross-linking agent are added for the second time to enhance the binding force between the powder and avoid caking.
本发明属于陶瓷材料技术领域，涉及一种高纯度氮化硅陶瓷及其制备方法及其制备方法。本发明通过添加特定比例的氧化镁(MgO)、氧化钡(BaO)和氧化铌(Nb2O5)，在高温下形成MgO‑BaO‑Nb2O5三元液相体系，氧化锰和氧化钒在高温时发生电价变化，以促进氮化硅颗粒间的迁移、扩散及电价变化活化晶格，提高烧结密度和机械性能。本发明采用封闭球磨方式，通过两次球磨，首次加入多种添加剂和溶剂以确保粉末充分混合，第二次加入麦芽糖和交联剂，以增强粉末间的结合力并避免结团。
High-purity silicon nitride ceramic and preparation method thereof
一种高纯度氮化硅陶瓷及其制备方法
YE CHUANJIAN (Autor:in) / LI PING (Autor:in) / LI SHAOFENG (Autor:in) / LI JIADONG (Autor:in) / DONG JUNFENG (Autor:in)
10.12.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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