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Preparation of nitride combined corundum-silicon carbide composite material
The invention relates to the technical field of refractory material production, in particular to preparation of a nitride combined corundum-silicon carbide composite material. The preparation method comprises the following steps: preparing 50-80wt% of silicon carbide particles, 5-20wt% of corundum particles, 5-20wt% of silicon powder, 2-12wt% of silicon dioxide micro powder, 2-5wt% of an additive and 1-2wt% of water or alcohol; wherein the corundum particles are composed of corundum particles with two different particle sizes of 0-1 mm and 1-3 mm, and the content of the corundum particles is 3-8 wt% and 5-15 wt% respectively; the silicon carbide particles are composed of three kinds of silicon carbide particles with different particle sizes of 1.5-2.5 mm, 0.5-1.5 mm and 0-0.5 mm, and the content of the silicon carbide particles is 10-15 wt%, 25-35 wt% and 10-15 wt% respectively; mixing the silicon carbide micro powder, the silicon powder and the silicon dioxide powder to obtain mixed fine powder; and loading the mixture into a mold, carrying out friction vibration molding, drying, carrying out nitridation treatment, carrying out a nitridation reaction on the green body silicon powder and the silicon dioxide micro powder to generate silicon nitride and silicon oxynitride, and cooling to room temperature along with a furnace to obtain the nitride combined corundum-silicon carbide composite material. The process is simple, the production cost is low, the product has excellent high-temperature resistance, and the thermal shock resistance is obviously superior to that of a traditional silicon nitride combined silicon carbide material.
本发明涉及耐火材料生产技术领域，具体涉及氮化物结合刚玉‑碳化硅复合材料的制备。碳化硅颗粒50‑80wt%、刚玉颗粒5‑20wt%、硅粉5‑20wt%、二氧化硅微粉2‑12wt%，外加添加剂2‑5wt%、水或酒精1‑2wt%；其中刚玉颗粒由0‑1mm和1‑3mm两种不同粒径的刚玉颗粒组成，含量分别为3‑8wt%和5‑15wt%；碳化硅颗粒由1.5‑2.5mm、0.5‑1.5、0‑0.5mm三种不同粒径的碳化硅颗粒组成，含量分别为10‑15wt%、25‑35wt%、10‑15wt%；碳化硅微粉、硅粉、二氧化硅粉混合获得混合细粉；将混合料装入模具并摩擦振动成型，干燥后进行氮化处理，坯体硅粉和二氧化硅微粉共同氮化反应生成氮化硅和氧氮化硅，随炉冷却到室温，得到氮化物结合刚玉‑碳化硅复合材料。工艺简单，生产成本低，其制品具有耐高温性能优良，抗热震性能明显优于传统的氮化硅结合碳化硅材料。
Preparation of nitride combined corundum-silicon carbide composite material
The invention relates to the technical field of refractory material production, in particular to preparation of a nitride combined corundum-silicon carbide composite material. The preparation method comprises the following steps: preparing 50-80wt% of silicon carbide particles, 5-20wt% of corundum particles, 5-20wt% of silicon powder, 2-12wt% of silicon dioxide micro powder, 2-5wt% of an additive and 1-2wt% of water or alcohol; wherein the corundum particles are composed of corundum particles with two different particle sizes of 0-1 mm and 1-3 mm, and the content of the corundum particles is 3-8 wt% and 5-15 wt% respectively; the silicon carbide particles are composed of three kinds of silicon carbide particles with different particle sizes of 1.5-2.5 mm, 0.5-1.5 mm and 0-0.5 mm, and the content of the silicon carbide particles is 10-15 wt%, 25-35 wt% and 10-15 wt% respectively; mixing the silicon carbide micro powder, the silicon powder and the silicon dioxide powder to obtain mixed fine powder; and loading the mixture into a mold, carrying out friction vibration molding, drying, carrying out nitridation treatment, carrying out a nitridation reaction on the green body silicon powder and the silicon dioxide micro powder to generate silicon nitride and silicon oxynitride, and cooling to room temperature along with a furnace to obtain the nitride combined corundum-silicon carbide composite material. The process is simple, the production cost is low, the product has excellent high-temperature resistance, and the thermal shock resistance is obviously superior to that of a traditional silicon nitride combined silicon carbide material.
本发明涉及耐火材料生产技术领域，具体涉及氮化物结合刚玉‑碳化硅复合材料的制备。碳化硅颗粒50‑80wt%、刚玉颗粒5‑20wt%、硅粉5‑20wt%、二氧化硅微粉2‑12wt%，外加添加剂2‑5wt%、水或酒精1‑2wt%；其中刚玉颗粒由0‑1mm和1‑3mm两种不同粒径的刚玉颗粒组成，含量分别为3‑8wt%和5‑15wt%；碳化硅颗粒由1.5‑2.5mm、0.5‑1.5、0‑0.5mm三种不同粒径的碳化硅颗粒组成，含量分别为10‑15wt%、25‑35wt%、10‑15wt%；碳化硅微粉、硅粉、二氧化硅粉混合获得混合细粉；将混合料装入模具并摩擦振动成型，干燥后进行氮化处理，坯体硅粉和二氧化硅微粉共同氮化反应生成氮化硅和氧氮化硅，随炉冷却到室温，得到氮化物结合刚玉‑碳化硅复合材料。工艺简单，生产成本低，其制品具有耐高温性能优良，抗热震性能明显优于传统的氮化硅结合碳化硅材料。
Preparation of nitride combined corundum-silicon carbide composite material
氮化物结合刚玉-碳化硅复合材料的制备
XIANG YUBO (author) / WU JIGUANG (author) / JUNG HAN (author) / MA ZHAOYANG (author) / CAO HUIYAN (author) / WANG JIANDONG (author) / ZHANG XINHUA (author) / LIU CHONGFENG (author) / HUANG ZHILIN (author)
2024-11-08
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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