A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for preparing silicon nitride ceramic through low-drying-stress gel injection molding
The invention relates to a low-drying-stress method for preparing silicon nitride ceramic through gel injection molding, which comprises the following steps: mixing a monomer, a cross-linking agent and deionized water, adding a dispersing agent, a suspending agent and a defoaming agent, stirring, adding silicon nitride powder and a sintering aid, adding a regulator and a filler, mixing, and carrying out vacuum defoaming, so as to obtain the low-drying-stress silicon nitride ceramic. Adding a catalyst and an initiator to obtain slurry, curing for 10-100 minutes at the temperature of 18-25 DEG C, molding, demolding to obtain a green body, drying the green body, sintering, and preserving heat to obtain silicon nitride ceramic; the filling agent is a chitosan modified polyurethane prepolymer, the filling agent accounts for 0.5-2% of the mass of the slurry, and the conditioning agent is tetraethylammonium hydroxide. The method has the effects of reducing the ceramic drying shrinkage rate and improving the product quality.
本申请涉及一种低干燥应力的凝胶注成型制备氮化硅陶瓷的方法，包括如下步骤：将单体、交联剂与去离子水混合后，加入分散剂、悬浮剂与消泡剂，搅拌后，再加入氮化硅粉体与烧结助剂，并加入调节剂与填充剂，混合后真空脱泡，加入催化剂与引发剂得到浆料，在18‑25℃环境下固化10‑100min成型，脱模后得到坯体，将坯体干燥后进行烧结，保温后得到氮化硅陶瓷；填充剂为壳聚糖改性聚氨酯预聚体，填充剂占浆料质量的0.5‑2%，调节剂为四乙基氢氧化铵。本申请具有降低陶瓷干燥收缩率并提升产品质量的效果。
Method for preparing silicon nitride ceramic through low-drying-stress gel injection molding
The invention relates to a low-drying-stress method for preparing silicon nitride ceramic through gel injection molding, which comprises the following steps: mixing a monomer, a cross-linking agent and deionized water, adding a dispersing agent, a suspending agent and a defoaming agent, stirring, adding silicon nitride powder and a sintering aid, adding a regulator and a filler, mixing, and carrying out vacuum defoaming, so as to obtain the low-drying-stress silicon nitride ceramic. Adding a catalyst and an initiator to obtain slurry, curing for 10-100 minutes at the temperature of 18-25 DEG C, molding, demolding to obtain a green body, drying the green body, sintering, and preserving heat to obtain silicon nitride ceramic; the filling agent is a chitosan modified polyurethane prepolymer, the filling agent accounts for 0.5-2% of the mass of the slurry, and the conditioning agent is tetraethylammonium hydroxide. The method has the effects of reducing the ceramic drying shrinkage rate and improving the product quality.
本申请涉及一种低干燥应力的凝胶注成型制备氮化硅陶瓷的方法，包括如下步骤：将单体、交联剂与去离子水混合后，加入分散剂、悬浮剂与消泡剂，搅拌后，再加入氮化硅粉体与烧结助剂，并加入调节剂与填充剂，混合后真空脱泡，加入催化剂与引发剂得到浆料，在18‑25℃环境下固化10‑100min成型，脱模后得到坯体，将坯体干燥后进行烧结，保温后得到氮化硅陶瓷；填充剂为壳聚糖改性聚氨酯预聚体，填充剂占浆料质量的0.5‑2%，调节剂为四乙基氢氧化铵。本申请具有降低陶瓷干燥收缩率并提升产品质量的效果。
Method for preparing silicon nitride ceramic through low-drying-stress gel injection molding
一种低干燥应力的凝胶注成型制备氮化硅陶瓷的方法
FANG RENDE ( author ) / WANG ZHEN ( author ) / YAN YONGJIE ( author ) / TANG QIAN ( author )
2024-08-16
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Method for preparing aluminum nitride ceramic through injection molding
| European Patent Office | 2023
| European Patent Office | 2023
Method for preparing AlON ceramic green body through injection molding
| European Patent Office | 2024
Injection Molding of Silicon Nitride
| British Library Online Contents | 1994