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TiN-Al2O3 composite material and preparation method thereof
The invention relates to a TiN-Al2O3 composite material and a preparation method thereof, and belongs to the technical field of high-temperature materials. The TiN-Al2O3 composite material is prepared from the following components in percentage by mass: 53 percent to 95 percent of Al2O3, 3 percent to 45 percent of TiN and the balance of impurities. The method comprises the following steps: crushing a titanium-containing corundum (Ti2O3-Al2O3) raw material, weighing the titanium-containing corundum (Ti2O3-Al2O3) raw material and carbon powder according to a mass ratio of Ti2O3 to C of (4.0-6.0): 1.0, adding 0.5-5% of a binding agent, uniformly mixing, and pressing into pellets; the pellets are placed in a graphite crucible, nitrogen is introduced into an intermediate frequency furnace, electromagnetic induction heating is utilized, the heating time ranges from 10 min to 60 min, and the temperature ranges from 1400 DEG C to 2000 DEG C; the method comprises the following steps: firstly, heating a graphite crucible by utilizing electromagnetic induction, and when the temperature is greater than or equal to 1400 DEG C, carrying out reduction nitridation reaction on pellets in contact with the graphite crucible to generate a TiN-Al2O3 composite material; tiN has good conductivity, the newly generated TiN is further heated through electromagnetic induction, the reduction nitridation reaction of the internal pellets is promoted, and TiN is generated inwards layer by layer till the reaction is finished. The preparation method is simple, short in technological process, high in efficiency, rich in raw materials and excellent in cost performance.
本发明涉及一种TiN‑Al2O3复合材料及其制备方法，属于高温材料技术领域。所述TiN‑Al2O3复合材料包括如下质量百分比的组分：53％～95％的Al2O3、3％～45％的TiN，其余为杂质。将含钛刚玉(Ti2O3‑Al2O3)原料破碎处理，与碳粉按照质量百分比Ti2O3：C＝(4.0～6.0)：1.0进行称量，外加0.5～5％结合剂，混合均匀后压成球团；将球团置于石墨坩埚中，在中频炉内通入氮气利用电磁感应加热，加热时间为10～60min，温度为1400～2000℃。本发明利用电磁感应首先将石墨坩埚加热，当温度≥1400℃时，与石墨坩埚接触的球团首先发生还原氮化反应，生成TiN‑Al2O3复合材料；TiN具有良好的导电性，利用电磁感应进一步给新生成的TiN加热，促进内部球团的还原氮化反应，TiN向内逐层生成，直至反应结束。本发明制备方法简单，工艺流程短，效率高，原料丰富且性价比优。
TiN-Al2O3 composite material and preparation method thereof
The invention relates to a TiN-Al2O3 composite material and a preparation method thereof, and belongs to the technical field of high-temperature materials. The TiN-Al2O3 composite material is prepared from the following components in percentage by mass: 53 percent to 95 percent of Al2O3, 3 percent to 45 percent of TiN and the balance of impurities. The method comprises the following steps: crushing a titanium-containing corundum (Ti2O3-Al2O3) raw material, weighing the titanium-containing corundum (Ti2O3-Al2O3) raw material and carbon powder according to a mass ratio of Ti2O3 to C of (4.0-6.0): 1.0, adding 0.5-5% of a binding agent, uniformly mixing, and pressing into pellets; the pellets are placed in a graphite crucible, nitrogen is introduced into an intermediate frequency furnace, electromagnetic induction heating is utilized, the heating time ranges from 10 min to 60 min, and the temperature ranges from 1400 DEG C to 2000 DEG C; the method comprises the following steps: firstly, heating a graphite crucible by utilizing electromagnetic induction, and when the temperature is greater than or equal to 1400 DEG C, carrying out reduction nitridation reaction on pellets in contact with the graphite crucible to generate a TiN-Al2O3 composite material; tiN has good conductivity, the newly generated TiN is further heated through electromagnetic induction, the reduction nitridation reaction of the internal pellets is promoted, and TiN is generated inwards layer by layer till the reaction is finished. The preparation method is simple, short in technological process, high in efficiency, rich in raw materials and excellent in cost performance.
本发明涉及一种TiN‑Al2O3复合材料及其制备方法，属于高温材料技术领域。所述TiN‑Al2O3复合材料包括如下质量百分比的组分：53％～95％的Al2O3、3％～45％的TiN，其余为杂质。将含钛刚玉(Ti2O3‑Al2O3)原料破碎处理，与碳粉按照质量百分比Ti2O3：C＝(4.0～6.0)：1.0进行称量，外加0.5～5％结合剂，混合均匀后压成球团；将球团置于石墨坩埚中，在中频炉内通入氮气利用电磁感应加热，加热时间为10～60min，温度为1400～2000℃。本发明利用电磁感应首先将石墨坩埚加热，当温度≥1400℃时，与石墨坩埚接触的球团首先发生还原氮化反应，生成TiN‑Al2O3复合材料；TiN具有良好的导电性，利用电磁感应进一步给新生成的TiN加热，促进内部球团的还原氮化反应，TiN向内逐层生成，直至反应结束。本发明制备方法简单，工艺流程短，效率高，原料丰富且性价比优。
TiN-Al2O3 composite material and preparation method thereof
一种TiN-Al2O3复合材料及其制备方法
MA CHENHONG (author) / LI YONG (author) / SUN JIALIN (author) / FENG LI (author) / BAI LIN (author) / XU JIULIN (author)
2024-05-28
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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