Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention relates to the technical field of transparent ceramic preparation, and discloses a method for preparing high-transparency AlON ceramic through high-temperature instantaneous liquid-phase pressureless sintering. The preparation method comprises the following steps: taking pure-phase AlON powder as a raw material, adding a sintering aid, carrying out ball milling to obtain AlON powder with D50 of 3.5-1.5 microns, and carrying out dry pressing to obtain an AlON green body; the AlON green body is heated to the pressureless sintering temperature T1 at the heating rate v1 in the flowing nitrogen environment, and the temperature is kept for t1; the temperature is raised to the instantaneous liquid phase temperature T2 at the temperature raising rate v2, and heat preservation is conducted for 0-10 min; cooling to a pressureless sintering temperature T1 at a cooling rate v3, and keeping the temperature for t2 to prepare the AlON ceramic; wherein v1 is not less than 5 DEG C/min and not more than 15 DEG C/min, v2 is not less than 2 DEG C/min and not more than 4 DEG C/min, and v3 is not less than 2 DEG C/min and not more than 4 DEG 1900 DEG C < = T1 < = 2000 DEG C, and 2030 DEG C < = T2 < = 2060 DEG C; 2 h < = t1 + t2 < = 6 h, and t1 > t2 > = 0. According to the method provided by the invention, an instantaneous liquid phase process is adopted, so that the problems of low density and poor light transmittance caused by dry pressing and pressureless sintering processes of coarse-particle AlON powder are solved, and the method has a relatively high practical application value.
本发明涉及透明陶瓷制备技术领域，公开了一种高温瞬时液相无压烧结制备高透明度AlON陶瓷的方法。其包括以下步骤：以纯相AlON粉体为原料，添加烧结助剂，球磨制得D50＝3.5‑1.5μm的AlON粉体，干压成型得AlON坯体；AlON坯体在流动氮气环境下，以升温速率v1升温至无压烧结温度T1保温t1时间；以升温速率v2升温至瞬时液相温度T2保温0‑10min；以降温速率v3降温至无压烧结温度T1保温t2时间，制得AlON陶瓷；其中，5℃/min≤v1≤15℃/min，2℃/min≤v2≤4℃/min，2℃/min≤v3≤4℃/min；1900℃≤T1≤2000℃，2030℃≤T2≤2060℃；2h≤t1+t2≤6h，且t1＞t2≥0。本发明提供的方法，采用瞬时液相工艺，解决了粗颗粒AlON粉体干压成型、无压烧结工艺所导致的致密度低、透光率不佳的问题，具有较高的实际应用价值。
The invention relates to the technical field of transparent ceramic preparation, and discloses a method for preparing high-transparency AlON ceramic through high-temperature instantaneous liquid-phase pressureless sintering. The preparation method comprises the following steps: taking pure-phase AlON powder as a raw material, adding a sintering aid, carrying out ball milling to obtain AlON powder with D50 of 3.5-1.5 microns, and carrying out dry pressing to obtain an AlON green body; the AlON green body is heated to the pressureless sintering temperature T1 at the heating rate v1 in the flowing nitrogen environment, and the temperature is kept for t1; the temperature is raised to the instantaneous liquid phase temperature T2 at the temperature raising rate v2, and heat preservation is conducted for 0-10 min; cooling to a pressureless sintering temperature T1 at a cooling rate v3, and keeping the temperature for t2 to prepare the AlON ceramic; wherein v1 is not less than 5 DEG C/min and not more than 15 DEG C/min, v2 is not less than 2 DEG C/min and not more than 4 DEG C/min, and v3 is not less than 2 DEG C/min and not more than 4 DEG 1900 DEG C < = T1 < = 2000 DEG C, and 2030 DEG C < = T2 < = 2060 DEG C; 2 h < = t1 + t2 < = 6 h, and t1 > t2 > = 0. According to the method provided by the invention, an instantaneous liquid phase process is adopted, so that the problems of low density and poor light transmittance caused by dry pressing and pressureless sintering processes of coarse-particle AlON powder are solved, and the method has a relatively high practical application value.
本发明涉及透明陶瓷制备技术领域，公开了一种高温瞬时液相无压烧结制备高透明度AlON陶瓷的方法。其包括以下步骤：以纯相AlON粉体为原料，添加烧结助剂，球磨制得D50＝3.5‑1.5μm的AlON粉体，干压成型得AlON坯体；AlON坯体在流动氮气环境下，以升温速率v1升温至无压烧结温度T1保温t1时间；以升温速率v2升温至瞬时液相温度T2保温0‑10min；以降温速率v3降温至无压烧结温度T1保温t2时间，制得AlON陶瓷；其中，5℃/min≤v1≤15℃/min，2℃/min≤v2≤4℃/min，2℃/min≤v3≤4℃/min；1900℃≤T1≤2000℃，2030℃≤T2≤2060℃；2h≤t1+t2≤6h，且t1＞t2≥0。本发明提供的方法，采用瞬时液相工艺，解决了粗颗粒AlON粉体干压成型、无压烧结工艺所导致的致密度低、透光率不佳的问题，具有较高的实际应用价值。
Method for preparing high-transparency AlON ceramic through high-temperature instantaneous liquid-phase pressureless sintering
一种高温瞬时液相无压烧结制备高透明度AlON陶瓷的方法
20.08.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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