Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of bimodal distribution superfine boron carbide powder
The invention relates to the technical field of preparation of boron carbide powder, in particular to a preparation method of bimodal distribution superfine boron carbide powder, which comprises the following steps: S1, crushing and filtering boron carbide by using grinding equipment to prepare 0.8-1 mu m unimodal distribution superfine boron carbide powder; s2, preparing a gel method precursor by adopting a gel method, and uniformly doping the gel method precursor with the superfine boron carbide powder in the step S1 and the gel precursor; s3, loading the black precursor in the step S2 into a graphite vessel, heating to 1200 DEG C at a speed of 15 DEG C/min in a vacuum environment, then heating to 1500 DEG C at a speed of 7 DEG C/min, carrying out heat preservation for 3 hours, and carrying out vacuum cooling to room temperature to obtain a black powder dopant; and S4, the black powder dopant is ground and sieved through a 300-mesh sieve, and finally the bimodal distribution superfine boron carbide powder is obtained and is large in sintering activity and beneficial to sintering. Fine boron carbide powder can be prepared through multiple times of grinding and crushing.
本发明涉及碳化硼粉体制备技术领域，具体为一种双峰分布的超细碳化硼粉体的制备方法，包括以下步骤：S1、采用研磨设备对碳化硼破碎过滤，制取0.8‑1μm的单峰分布的超细碳化硼粉体；S2、采用凝胶法制备凝胶法前驱体，使其与步骤S1中的超细碳化硼粉体与凝胶前驱体均匀掺杂；S3、将步骤S2中的黑色前驱体装入石墨皿，在真空环境下以15℃/min的速度加热至1200℃，再以7℃/min的速度加热至1500℃，保温3h，并真空冷却至室温，得到黑色粉体掺杂物；S4、将黑色粉体掺杂物研磨，过300目筛，最终得到双峰分布的超细碳化硼粉体，其烧结活性大，有利于烧结。本发明通过多次研磨、破碎可以制取精细的碳化硼粉体。
Preparation method of bimodal distribution superfine boron carbide powder
The invention relates to the technical field of preparation of boron carbide powder, in particular to a preparation method of bimodal distribution superfine boron carbide powder, which comprises the following steps: S1, crushing and filtering boron carbide by using grinding equipment to prepare 0.8-1 mu m unimodal distribution superfine boron carbide powder; s2, preparing a gel method precursor by adopting a gel method, and uniformly doping the gel method precursor with the superfine boron carbide powder in the step S1 and the gel precursor; s3, loading the black precursor in the step S2 into a graphite vessel, heating to 1200 DEG C at a speed of 15 DEG C/min in a vacuum environment, then heating to 1500 DEG C at a speed of 7 DEG C/min, carrying out heat preservation for 3 hours, and carrying out vacuum cooling to room temperature to obtain a black powder dopant; and S4, the black powder dopant is ground and sieved through a 300-mesh sieve, and finally the bimodal distribution superfine boron carbide powder is obtained and is large in sintering activity and beneficial to sintering. Fine boron carbide powder can be prepared through multiple times of grinding and crushing.
本发明涉及碳化硼粉体制备技术领域，具体为一种双峰分布的超细碳化硼粉体的制备方法，包括以下步骤：S1、采用研磨设备对碳化硼破碎过滤，制取0.8‑1μm的单峰分布的超细碳化硼粉体；S2、采用凝胶法制备凝胶法前驱体，使其与步骤S1中的超细碳化硼粉体与凝胶前驱体均匀掺杂；S3、将步骤S2中的黑色前驱体装入石墨皿，在真空环境下以15℃/min的速度加热至1200℃，再以7℃/min的速度加热至1500℃，保温3h，并真空冷却至室温，得到黑色粉体掺杂物；S4、将黑色粉体掺杂物研磨，过300目筛，最终得到双峰分布的超细碳化硼粉体，其烧结活性大，有利于烧结。本发明通过多次研磨、破碎可以制取精细的碳化硼粉体。
Preparation method of bimodal distribution superfine boron carbide powder
一种双峰分布的超细碳化硼粉体的制备方法
ZHAO GUOZHANG (Autor:in) / WANG HONGTAO (Autor:in) / XIE MING (Autor:in)
26.05.2023
Patent
Elektronische Ressource
Chinesisch
Preparation process of superfine silicon carbide powder
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