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Method for preparing high-purity single-phase AlON transparent ceramic powder through one-step rapid heating carbon thermal reduction nitridation
The invention relates to a method for preparing high-purity single-phase AlON transparent ceramic powder through one-step rapid heating carbon thermal reduction nitridation, which belongs to the field of transparent ceramic material preparation. The method comprises the following steps: taking nano Al2O3 and nano carbon black powder as raw materials, in a nitrogen environment, directly and rapidly heating Al2O3/C mixed powder to 1750-1800 DEG C, and keeping the temperature for 30-120 minutes to obtain the high-purity single-phase AlON powder. According to the method, aggregation and growth of alpha-Al2O3 particles can be effectively inhibited in the heating process, so that the transmission distance of a substance for forming an AlON phase is shortened, and pure-phase AlON transparent ceramic powder can be obtained within a short heat preservation time. According to the method for preparing the AlON powder, an intermediate heat preservation stage of traditional carbon thermal reduction and nitridation is not needed, and the heat preservation time needed for forming pure-phase AlON is short, so that the efficiency is high, the energy-saving effect is very good, and more importantly, ceramic prepared from the AlON powder prepared through one-step rapid heating under the rapid pressureless sintering condition is high in transmittance, and the transparency can reach 83-84%.
本发明涉及一步快速升温方法碳热还原氮化制备高纯单相AlON透明陶瓷粉体。属于透明陶瓷材料制备领域。具体是以纳米Al2O3和纳米炭黑粉体为原料，在氮气环境中，将Al2O3/C混合粉体直接快速加热到1750‑1800℃，保温30‑120min，来获得高纯单相的AlON粉体。该方法能够在升温过程中有效抑制α‑Al2O3颗粒聚集与生长，从而缩短形成AlON相的物质传输距离，有利于在较短的保温时间内获得纯相的AlON透明陶瓷粉体。采用该方法制备AlON粉体，无须传统碳热还原氮化的中间保温阶段，而且形成纯相AlON所需的保温时间较短，因此，不仅效率高，而且节能效果非常好，特别重要的是，通过此一步快速升温制得的AlON粉体，在过快速无压烧结条件下制得的陶瓷透过率高，透可达83‑84％。
Method for preparing high-purity single-phase AlON transparent ceramic powder through one-step rapid heating carbon thermal reduction nitridation
The invention relates to a method for preparing high-purity single-phase AlON transparent ceramic powder through one-step rapid heating carbon thermal reduction nitridation, which belongs to the field of transparent ceramic material preparation. The method comprises the following steps: taking nano Al2O3 and nano carbon black powder as raw materials, in a nitrogen environment, directly and rapidly heating Al2O3/C mixed powder to 1750-1800 DEG C, and keeping the temperature for 30-120 minutes to obtain the high-purity single-phase AlON powder. According to the method, aggregation and growth of alpha-Al2O3 particles can be effectively inhibited in the heating process, so that the transmission distance of a substance for forming an AlON phase is shortened, and pure-phase AlON transparent ceramic powder can be obtained within a short heat preservation time. According to the method for preparing the AlON powder, an intermediate heat preservation stage of traditional carbon thermal reduction and nitridation is not needed, and the heat preservation time needed for forming pure-phase AlON is short, so that the efficiency is high, the energy-saving effect is very good, and more importantly, ceramic prepared from the AlON powder prepared through one-step rapid heating under the rapid pressureless sintering condition is high in transmittance, and the transparency can reach 83-84%.
本发明涉及一步快速升温方法碳热还原氮化制备高纯单相AlON透明陶瓷粉体。属于透明陶瓷材料制备领域。具体是以纳米Al2O3和纳米炭黑粉体为原料，在氮气环境中，将Al2O3/C混合粉体直接快速加热到1750‑1800℃，保温30‑120min，来获得高纯单相的AlON粉体。该方法能够在升温过程中有效抑制α‑Al2O3颗粒聚集与生长，从而缩短形成AlON相的物质传输距离，有利于在较短的保温时间内获得纯相的AlON透明陶瓷粉体。采用该方法制备AlON粉体，无须传统碳热还原氮化的中间保温阶段，而且形成纯相AlON所需的保温时间较短，因此，不仅效率高，而且节能效果非常好，特别重要的是，通过此一步快速升温制得的AlON粉体，在过快速无压烧结条件下制得的陶瓷透过率高，透可达83‑84％。
Method for preparing high-purity single-phase AlON transparent ceramic powder through one-step rapid heating carbon thermal reduction nitridation
一种一步快速升温碳热还原氮化制备高纯单相AlON透明陶瓷粉体的方法
SHAN YINGCHUN (Autor:in) / XU JIUJUN (Autor:in) / ZHANG XIAORU (Autor:in) / SUN XIANNIAN (Autor:in) / MA LIYA (Autor:in) / HAN XIAOGUANG (Autor:in)
02.11.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
Preparation method of AlON transparent ceramic powder
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