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Preparation method of boron nitride-spinel composite material
The invention provides a preparation method of a boron nitride-spinel composite material, and belongs to the field of ceramic hot pressed sintering. The MgO powder, the Al2O3 powder and the h-BN powder are adopted as raw materials, MgAl2O4 particle composite h-BN is generated through in-situ reaction of the MgO powder and the Al2O3 powder, and compared with a traditional method for directly mixing the MgAl2O4 powder and the h-BN powder, in-situ generated MgAl2O4 crystal grains are finer and more uniform in distribution due to the volume expansion effect accompanied by in-situ spinel and external pressure provided by hot pressing sintering, and the in-situ generated MgAl2O4 crystal grains are more uniform. And the h-BN/MgAl2O4 composite material is more tightly combined with the interface of the h-BN main crystal grains, so that the densification degree and the erosion resistance of the h-BN/MgAl2O4 composite material are improved.
本发明提供了一种氮化硼‑尖晶石复合材料的制备方法，属于陶瓷热压烧结领域。本发明采用MgO粉、Al2O3粉和h‑BN粉作为原料，MgO粉和Al2O3粉原位反应生成MgAl2O4颗粒复合h‑BN，与传统直接采用MgAl2O4粉末与h‑BN粉末混合的方法相比，原位尖晶石化所伴随的体积膨胀效应及热压烧结提供的外部压力使得原位生成的MgAl2O4晶粒更加细小，分布更加均匀，其与h‑BN主晶粒的界面结合更加紧密，提高了h‑BN/MgAl2O4复合材料的致密化程度和抗侵蚀性能。
Preparation method of boron nitride-spinel composite material
The invention provides a preparation method of a boron nitride-spinel composite material, and belongs to the field of ceramic hot pressed sintering. The MgO powder, the Al2O3 powder and the h-BN powder are adopted as raw materials, MgAl2O4 particle composite h-BN is generated through in-situ reaction of the MgO powder and the Al2O3 powder, and compared with a traditional method for directly mixing the MgAl2O4 powder and the h-BN powder, in-situ generated MgAl2O4 crystal grains are finer and more uniform in distribution due to the volume expansion effect accompanied by in-situ spinel and external pressure provided by hot pressing sintering, and the in-situ generated MgAl2O4 crystal grains are more uniform. And the h-BN/MgAl2O4 composite material is more tightly combined with the interface of the h-BN main crystal grains, so that the densification degree and the erosion resistance of the h-BN/MgAl2O4 composite material are improved.
本发明提供了一种氮化硼‑尖晶石复合材料的制备方法，属于陶瓷热压烧结领域。本发明采用MgO粉、Al2O3粉和h‑BN粉作为原料，MgO粉和Al2O3粉原位反应生成MgAl2O4颗粒复合h‑BN，与传统直接采用MgAl2O4粉末与h‑BN粉末混合的方法相比，原位尖晶石化所伴随的体积膨胀效应及热压烧结提供的外部压力使得原位生成的MgAl2O4晶粒更加细小，分布更加均匀，其与h‑BN主晶粒的界面结合更加紧密，提高了h‑BN/MgAl2O4复合材料的致密化程度和抗侵蚀性能。
Preparation method of boron nitride-spinel composite material
一种氮化硼-尖晶石复合材料的制备方法
CHEN YONGQIANG (author) / TANG BEIBEI (author) / FAN BINGBING (author) / WANG HAILONG (author) / ZHANG RUI (author) / LIU GUOQI (author) / LI HONGXIA (author) / CHEN MAO (author) / QI YONGSHUN (author) / LUO LING (author)
2024-08-30
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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