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Silicon nitride porous ceramic with three-dimensional network interlocking structure as well as preparation method and application of silicon nitride porous ceramic
The invention belongs to the technical field of non-oxide-based materials, and discloses silicon nitride porous ceramic with a three-dimensional network interlocking structure as well as a preparation method and application of the silicon nitride porous ceramic. The method comprises the following steps: taking Si3N4 powder as a matrix raw material, adding MgO-Re2O3 and B/TiB2/ZrB2/HfB2/TaB2/CrB2, mixing and drying to obtain mixed powder, and carrying out cold isostatic pressing to obtain a green body; then heating the green body to 1000-1100 DEG C in a vacuum state, then introducing 0.1-0.2 MPa of flowing N2, and heating to 1450-1550 DEG C at a rate of 5-8 DEG C/min; and heating to 1600-1800 DEG C at a rate of 3-5 DEG C/min, and then rapidly cooling to 1200 DEG C to obtain the silicon nitride porous ceramic with the three-dimensional interlocking network structure. The process is simple, and the prepared porous ceramic is high in porosity and high in bending strength.
本发明属于非氧化物基材料技术领域，公开了一种三维网络互锁结构的氮化硅多孔陶瓷及其制备方法和应用。该方法是以Si3N4粉为基体原料，加入MgO‑Re2O3和B/TiB2/ZrB2/HfB2/TaB2/CrB2，经混料、干燥后，得到混合粉体，再通过冷等静压成型获得生坯；然后将生坯在真空状态下升温至1000～1100℃后再通入0.1～0.2MPa的流动N2，并以5～8℃/min的速率升温至1450～1550℃；以3～5℃/min的速率升温至1600～1800℃，然后迅速降温至1200℃，获得三维互锁网络结构的氮化硅多孔陶瓷。本发明工艺简单，制得的多孔陶瓷的气孔率高、抗弯强度高。
Silicon nitride porous ceramic with three-dimensional network interlocking structure as well as preparation method and application of silicon nitride porous ceramic
The invention belongs to the technical field of non-oxide-based materials, and discloses silicon nitride porous ceramic with a three-dimensional network interlocking structure as well as a preparation method and application of the silicon nitride porous ceramic. The method comprises the following steps: taking Si3N4 powder as a matrix raw material, adding MgO-Re2O3 and B/TiB2/ZrB2/HfB2/TaB2/CrB2, mixing and drying to obtain mixed powder, and carrying out cold isostatic pressing to obtain a green body; then heating the green body to 1000-1100 DEG C in a vacuum state, then introducing 0.1-0.2 MPa of flowing N2, and heating to 1450-1550 DEG C at a rate of 5-8 DEG C/min; and heating to 1600-1800 DEG C at a rate of 3-5 DEG C/min, and then rapidly cooling to 1200 DEG C to obtain the silicon nitride porous ceramic with the three-dimensional interlocking network structure. The process is simple, and the prepared porous ceramic is high in porosity and high in bending strength.
本发明属于非氧化物基材料技术领域，公开了一种三维网络互锁结构的氮化硅多孔陶瓷及其制备方法和应用。该方法是以Si3N4粉为基体原料，加入MgO‑Re2O3和B/TiB2/ZrB2/HfB2/TaB2/CrB2，经混料、干燥后，得到混合粉体，再通过冷等静压成型获得生坯；然后将生坯在真空状态下升温至1000～1100℃后再通入0.1～0.2MPa的流动N2，并以5～8℃/min的速率升温至1450～1550℃；以3～5℃/min的速率升温至1600～1800℃，然后迅速降温至1200℃，获得三维互锁网络结构的氮化硅多孔陶瓷。本发明工艺简单，制得的多孔陶瓷的气孔率高、抗弯强度高。
Silicon nitride porous ceramic with three-dimensional network interlocking structure as well as preparation method and application of silicon nitride porous ceramic
一种三维网络互锁结构的氮化硅多孔陶瓷及其制备方法和应用
GUO WEIMING (author) / ZENG XIANMING (author) / YU JUNJIE (author) / LIANG ZHENQUAN (author) / LIN HUATAI (author)
2023-09-05
Patent
Electronic Resource
Chinese
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