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Preparation method of silicon nitride ceramic with high thermal conductivity and low resistivity
The invention provides a preparation method of silicon nitride ceramic with high thermal conductivity and low resistivity, which comprises the following steps: uniformly mixing 40-71wt% of silicon nitride powder, 25-50wt% of titanium dioxide, 4-10wt% of sintering aid and an organic carbon source which is 0-2% of the weight of the silicon nitride powder, drying, sieving, and carrying out compression molding to obtain a ceramic biscuit; roasting the ceramic biscuit for 0.5-2 hours at the temperature of 400-900 DEG C; and carrying out heat preservation treatment at 1450-1650 DEG C for 2-4 hours, heating to 1850-1950 DEG C, and carrying out air pressure sintering for 0.5-12 hours to obtain the silicon nitride ceramic. According to the technical scheme, the process is simple and stable, conditions are easy to control, and the high-thermal-conductivity silicon nitride ceramic with excellent mechanical properties and low resistivity can be obtained.
本发明提供了一种高热导率低电阻率氮化硅陶瓷的制备方法，将40～71wt％的氮化硅粉体、25～50wt％的二氧化钛、4～10wt％的烧结助剂和氮化硅粉体重量0～2％的有机碳源均匀混合、干燥、过筛后压制成型，得到陶瓷素坯；将陶瓷素坯在400～900℃焙烧处理0.5～2小时；在1450～1650℃保温处理2～4h后升温至1850～1950℃气压烧结0.5～12小时，得到氮化硅陶瓷。本发明的技术方案工艺简单稳定，条件易于控制，可得到力学性能优异，具有低电阻率的高热导率氮化硅陶瓷。
Preparation method of silicon nitride ceramic with high thermal conductivity and low resistivity
The invention provides a preparation method of silicon nitride ceramic with high thermal conductivity and low resistivity, which comprises the following steps: uniformly mixing 40-71wt% of silicon nitride powder, 25-50wt% of titanium dioxide, 4-10wt% of sintering aid and an organic carbon source which is 0-2% of the weight of the silicon nitride powder, drying, sieving, and carrying out compression molding to obtain a ceramic biscuit; roasting the ceramic biscuit for 0.5-2 hours at the temperature of 400-900 DEG C; and carrying out heat preservation treatment at 1450-1650 DEG C for 2-4 hours, heating to 1850-1950 DEG C, and carrying out air pressure sintering for 0.5-12 hours to obtain the silicon nitride ceramic. According to the technical scheme, the process is simple and stable, conditions are easy to control, and the high-thermal-conductivity silicon nitride ceramic with excellent mechanical properties and low resistivity can be obtained.
本发明提供了一种高热导率低电阻率氮化硅陶瓷的制备方法，将40～71wt％的氮化硅粉体、25～50wt％的二氧化钛、4～10wt％的烧结助剂和氮化硅粉体重量0～2％的有机碳源均匀混合、干燥、过筛后压制成型，得到陶瓷素坯；将陶瓷素坯在400～900℃焙烧处理0.5～2小时；在1450～1650℃保温处理2～4h后升温至1850～1950℃气压烧结0.5～12小时，得到氮化硅陶瓷。本发明的技术方案工艺简单稳定，条件易于控制，可得到力学性能优异，具有低电阻率的高热导率氮化硅陶瓷。
Preparation method of silicon nitride ceramic with high thermal conductivity and low resistivity
一种高热导率低电阻率氮化硅陶瓷的制备方法
DUAN YUSEN (author) / ZHANG JINGXIAN (author)
2023-06-06
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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