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Unfired Si-SiC kiln furniture and preparation method thereof
The invention discloses unfired Si-SiC kiln furniture and a preparation method thereof, and belongs to the field of refractory materials. The kiln furniture comprises the following raw materials: 75-97 wt% of silicon carbide, 3-25 wt% of silicon powder, and 3-5 wt% of phenolic resin or dextrin as a binding agent. The preparation method comprises the following steps: burdening and uniformly mixing the raw materials and the binding agent, carrying out mechanical pressing, and drying at 200-300 DEG C for 12-48 hours to obtain the unfired Si-SiC kiln furniture. In order to solve the problems that in the prior art, Si3N4 and SiC combined kiln furniture is oxidized during service under the high-temperature oxygen-containing atmosphere condition, then the surface of the kiln furniture cracks, particles fall off and the like, and the kiln furniture cannot be normally used, Si is directly used as a raw material to be combined with SiC, the Si is preferentially oxidized and gradually converted into SiO2-SiC kiln furniture by means of the high oxyphilicity of Si in the service process, and the service life of the Si3N4 and SiC combined kiln furniture is prolonged. The problem of product cracking caused by SiC matrix oxidation is solved, and the service life of kiln furniture is prolonged. Compared with the complex preparation process of the existing Si3N4 combined SiC kiln furniture, the preparation method has the advantages that the pre-sintering process of the traditional kiln furniture is omitted, and the green and energy-saving preparation of the SiC kiln furniture is realized.
一种不烧Si‑SiC窑具及其制备方法，属于耐火材料领域。所述窑具由如下原料组成：75～97wt％的碳化硅、3～25wt％的硅粉，外加3～5wt％的酚醛树脂或糊精作为结合剂。将上述原料与结合剂经配料并均匀混合后，机压成型并于200℃～300℃干燥12h～48h，制得不烧Si‑SiC窑具。本发明针对现有技术中Si3N4结合SiC窑具在高温含氧气氛条件下服役时发生氧化进而导致窑具表面开裂、颗粒脱落等问题使其无法正常使用，将Si直接作为原料与SiC结合，使其在服役过程中利用Si的高亲氧性，优先发生氧化并逐渐转化为SiO2‑SiC窑具，解决了SiC基体氧化所带来制品开裂的问题，延长窑具的使用寿命。相较于目前Si3N4结合SiC窑具其复杂的制备工艺，本发明省去了传统窑具的预烧结工序，实现了绿色节能化制备SiC质窑具。
Unfired Si-SiC kiln furniture and preparation method thereof
The invention discloses unfired Si-SiC kiln furniture and a preparation method thereof, and belongs to the field of refractory materials. The kiln furniture comprises the following raw materials: 75-97 wt% of silicon carbide, 3-25 wt% of silicon powder, and 3-5 wt% of phenolic resin or dextrin as a binding agent. The preparation method comprises the following steps: burdening and uniformly mixing the raw materials and the binding agent, carrying out mechanical pressing, and drying at 200-300 DEG C for 12-48 hours to obtain the unfired Si-SiC kiln furniture. In order to solve the problems that in the prior art, Si3N4 and SiC combined kiln furniture is oxidized during service under the high-temperature oxygen-containing atmosphere condition, then the surface of the kiln furniture cracks, particles fall off and the like, and the kiln furniture cannot be normally used, Si is directly used as a raw material to be combined with SiC, the Si is preferentially oxidized and gradually converted into SiO2-SiC kiln furniture by means of the high oxyphilicity of Si in the service process, and the service life of the Si3N4 and SiC combined kiln furniture is prolonged. The problem of product cracking caused by SiC matrix oxidation is solved, and the service life of kiln furniture is prolonged. Compared with the complex preparation process of the existing Si3N4 combined SiC kiln furniture, the preparation method has the advantages that the pre-sintering process of the traditional kiln furniture is omitted, and the green and energy-saving preparation of the SiC kiln furniture is realized.
一种不烧Si‑SiC窑具及其制备方法，属于耐火材料领域。所述窑具由如下原料组成：75～97wt％的碳化硅、3～25wt％的硅粉，外加3～5wt％的酚醛树脂或糊精作为结合剂。将上述原料与结合剂经配料并均匀混合后，机压成型并于200℃～300℃干燥12h～48h，制得不烧Si‑SiC窑具。本发明针对现有技术中Si3N4结合SiC窑具在高温含氧气氛条件下服役时发生氧化进而导致窑具表面开裂、颗粒脱落等问题使其无法正常使用，将Si直接作为原料与SiC结合，使其在服役过程中利用Si的高亲氧性，优先发生氧化并逐渐转化为SiO2‑SiC窑具，解决了SiC基体氧化所带来制品开裂的问题，延长窑具的使用寿命。相较于目前Si3N4结合SiC窑具其复杂的制备工艺，本发明省去了传统窑具的预烧结工序，实现了绿色节能化制备SiC质窑具。
Unfired Si-SiC kiln furniture and preparation method thereof
一种不烧Si-SiC窑具及其制备方法
LI YONG (author) / HAN GI-SEOK (author) / LI HONGXIA (author) / MA CHENHONG (author)
2024-01-16
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
F27D
Einzelheiten oder Zubehör für Industrieöfen, Schachtöfen, Brennöfen oder Retorten, soweit sie nicht auf eine Ofenart eingeschränkt sind
,
DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
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