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Silicon carbide ceramic as well as preparation method and application thereof
The invention provides silicon carbide ceramic as well as a preparation method and application thereof. The preparation method comprises the following steps: granulating, forming and sintering in sequence, wherein the powder adopted in the granulation process comprises silicon-carbon composite micro-nano particles, and the preparation process of the silicon-carbon composite micro-nano particles comprises the following steps: firstly obtaining a carbon component of a micro-nano structure, and then growing or adhering a silicon component on the surface of the carbon component. According to the preparation method provided by the invention, the silicon element wraps or grows on the surface of the carbon component in situ in the raw material stage, so that the silicon element and the carbon component can be subjected to an effective and sufficient combination reaction through a short diffusion path in the sintering process, the siliconizing operation is not needed or reduced, the process and equipment are simplified, the product purity is effectively improved, and the production cost is reduced. And free silicon in the finished ceramic is reduced or eliminated, so that the high-temperature performance and corrosion resistance of the product are improved, the service life of the product is prolonged, and large-scale popularization and application are facilitated.
本发明提供一种碳化硅陶瓷及其制备方法与应用，所述制备方法包括依次进行的造粒、成型和烧结；其中，所述造粒过程采用的粉体包括硅‑碳复合微纳颗粒，且所述硅‑碳复合微纳颗粒的制备过程包括：先获取微纳结构的碳组分，然后在所述碳组分的表面生长或附着硅组分。本发明提供的制备方法在原材料阶段就将硅元素原位包裹或生长于碳组分的表面，使得二者在烧结过程中，通过较短的扩散程就可以进行有效且充分的化合反应，无需或减少渗硅操作，简化制程和设备，同时有效提升产品纯度，减少或消除成品陶瓷中游离硅的存在，进而改善产品的高温性能和抗腐蚀性能，延长产品使用寿命，有利于大规模推广应用。
Silicon carbide ceramic as well as preparation method and application thereof
The invention provides silicon carbide ceramic as well as a preparation method and application thereof. The preparation method comprises the following steps: granulating, forming and sintering in sequence, wherein the powder adopted in the granulation process comprises silicon-carbon composite micro-nano particles, and the preparation process of the silicon-carbon composite micro-nano particles comprises the following steps: firstly obtaining a carbon component of a micro-nano structure, and then growing or adhering a silicon component on the surface of the carbon component. According to the preparation method provided by the invention, the silicon element wraps or grows on the surface of the carbon component in situ in the raw material stage, so that the silicon element and the carbon component can be subjected to an effective and sufficient combination reaction through a short diffusion path in the sintering process, the siliconizing operation is not needed or reduced, the process and equipment are simplified, the product purity is effectively improved, and the production cost is reduced. And free silicon in the finished ceramic is reduced or eliminated, so that the high-temperature performance and corrosion resistance of the product are improved, the service life of the product is prolonged, and large-scale popularization and application are facilitated.
本发明提供一种碳化硅陶瓷及其制备方法与应用，所述制备方法包括依次进行的造粒、成型和烧结；其中，所述造粒过程采用的粉体包括硅‑碳复合微纳颗粒，且所述硅‑碳复合微纳颗粒的制备过程包括：先获取微纳结构的碳组分，然后在所述碳组分的表面生长或附着硅组分。本发明提供的制备方法在原材料阶段就将硅元素原位包裹或生长于碳组分的表面，使得二者在烧结过程中，通过较短的扩散程就可以进行有效且充分的化合反应，无需或减少渗硅操作，简化制程和设备，同时有效提升产品纯度，减少或消除成品陶瓷中游离硅的存在，进而改善产品的高温性能和抗腐蚀性能，延长产品使用寿命，有利于大规模推广应用。
Silicon carbide ceramic as well as preparation method and application thereof
一种碳化硅陶瓷及其制备方法与应用
CHEN CHAO (author) / LI HONGCAO (author) / ZHOU YONG (author) / WU WEIHUA (author) / TAO FEI (author) / FANG ZHIYUAN (author) / CUI HONGQIANG (author)
2024-04-26
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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