A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Porous high-entropy ceramic and preparation method thereof
The invention discloses a porous high-entropy ceramic and a preparation method thereof.The preparation method comprises the following steps that pore forming agent powder and ceramic precursor powder are mixed and subjected to tabletting treatment, and a porous high-entropy ceramic intermediate is obtained; performing sintering treatment and cleaning treatment on the porous high-entropy ceramic intermediate in sequence to obtain the porous high-entropy ceramic, wherein the melting point of the pore-forming agent powder is 30-1800 DEG C, and the solubility of the pore-forming agent powder is 99% or above; the temperature of the sintering treatment ranges from 800 DEG C to 2300 DEG C, and the pressure ranges from 4 GPa to 20 GPa. Compared with a disclosed method for preparing the porous high-entropy ceramic through in-situ reaction and partial sintering, the method aims at effectively controlling the porosity by introducing the pore-forming agent powder which is low in melting point and easy to dissolve; and secondly, compared with the problem of low strength caused by partial sintering, the bonding strength among high-entropy ceramic particles is enhanced by introducing high temperature and high pressure, so that the problem of coexistence of high porosity and high strength is solved.
本发明公开了一种多孔高熵陶瓷及其制备方法，所述制备方法包括以下步骤：将造孔剂粉末与陶瓷前驱体粉末混合，进行压片处理，得到多孔高熵陶瓷中间体；对所述多孔高熵陶瓷中间体依次进行烧结处理、清洗处理，得到所述多孔高熵陶瓷；其中，所述造孔剂粉末的熔点为30℃‑1800℃，溶解度为99％以上；所述烧结处理的温度为800℃‑2300℃，压力为4GPa‑20GPa。与公开的原位反应、部分烧结来制备多孔高熵陶瓷的方法相比，本发明旨在通过引入低熔点易于溶解的造孔剂粉末来有效控制孔隙率的大小；其次相比于部分烧结带来的强度较低的问题，本发明通过引入高温高压来强化高熵陶瓷颗粒间的结合强度，从而实现高孔隙率与高强度并存的难题。
Porous high-entropy ceramic and preparation method thereof
The invention discloses a porous high-entropy ceramic and a preparation method thereof.The preparation method comprises the following steps that pore forming agent powder and ceramic precursor powder are mixed and subjected to tabletting treatment, and a porous high-entropy ceramic intermediate is obtained; performing sintering treatment and cleaning treatment on the porous high-entropy ceramic intermediate in sequence to obtain the porous high-entropy ceramic, wherein the melting point of the pore-forming agent powder is 30-1800 DEG C, and the solubility of the pore-forming agent powder is 99% or above; the temperature of the sintering treatment ranges from 800 DEG C to 2300 DEG C, and the pressure ranges from 4 GPa to 20 GPa. Compared with a disclosed method for preparing the porous high-entropy ceramic through in-situ reaction and partial sintering, the method aims at effectively controlling the porosity by introducing the pore-forming agent powder which is low in melting point and easy to dissolve; and secondly, compared with the problem of low strength caused by partial sintering, the bonding strength among high-entropy ceramic particles is enhanced by introducing high temperature and high pressure, so that the problem of coexistence of high porosity and high strength is solved.
本发明公开了一种多孔高熵陶瓷及其制备方法，所述制备方法包括以下步骤：将造孔剂粉末与陶瓷前驱体粉末混合，进行压片处理，得到多孔高熵陶瓷中间体；对所述多孔高熵陶瓷中间体依次进行烧结处理、清洗处理，得到所述多孔高熵陶瓷；其中，所述造孔剂粉末的熔点为30℃‑1800℃，溶解度为99％以上；所述烧结处理的温度为800℃‑2300℃，压力为4GPa‑20GPa。与公开的原位反应、部分烧结来制备多孔高熵陶瓷的方法相比，本发明旨在通过引入低熔点易于溶解的造孔剂粉末来有效控制孔隙率的大小；其次相比于部分烧结带来的强度较低的问题，本发明通过引入高温高压来强化高熵陶瓷颗粒间的结合强度，从而实现高孔隙率与高强度并存的难题。
Porous high-entropy ceramic and preparation method thereof
一种多孔高熵陶瓷及其制备方法
ZOU YONGTAO (author) / LI QINGZE (author) / LI XIN (author) / LI YUAN (author) / ZHOU CANGTAO (author)
2024-08-02
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
High-entropy ceramic powder and preparation method thereof
| European Patent Office | 2023
High-entropy carbide ceramic and preparation method thereof
| European Patent Office | 2024
High-entropy ceramic block and preparation method thereof
| European Patent Office | 2024
High-entropy ceramic material and preparation method thereof
| European Patent Office | 2021
High-entropy zirconate ceramic and preparation method thereof
| European Patent Office | 2024