Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-thermal-conductivity silicon nitride ceramic material as well as preparation method and application thereof
According to the preparation method of the high-thermal-conductivity silicon nitride ceramic material, all the components are uniformly mixed through ball milling, the comprehensive performance of the prepared material is improved, all the components are subjected to compression molding through compression molding, follow-up sintering is facilitated, and in the sintering process, a liquid phase is generated through silicon nitride, magnesium oxide and yttrium oxide, so that the high-thermal-conductivity silicon nitride ceramic material is obtained. The crystal lattice oxygen content of the silicon nitride ceramic material is reduced, and the crystal grain growth is promoted by utilizing a dissolution-precipitation mechanism, so that the heat conductivity of the silicon nitride ceramic material is favorably improved; the introduction of the carbon nanotubes can reduce the oxygen content in the material and further improve the thermal conductivity, and the carbon nanotubes can improve the compactness of the silicon nitride ceramic material, thereby improving the strength of the silicon nitride ceramic material; the existence of lanthanum hexaboride is beneficial to promoting conversion of silicon nitride into high-hardness ceramic, the strength of the silicon nitride ceramic material is further improved, and all the components have a synergistic effect, so that the high-thermal-conductivity silicon nitride ceramic material with high strength is finally obtained.
本发明提供了一种高导热氮化硅陶瓷材料的制备方法，通过球磨使得各组分混合均匀，有利于提高制备的材料的综合性能，通过模压成型将各组分压制成型，并有利于后续烧结的进行，在烧结过程中，通过氮化硅、氧化镁和氧化钇生成的液相，降低所述氮化硅陶瓷材料的晶格氧含量，并且利用溶解‑析出机制促进晶粒生长，有利于提高所述氮化硅陶瓷材料的热导率；碳纳米管的引入，能够降低材料中氧含量，并进一步改善导热率，且碳纳米管可以提高所述氮化硅陶瓷材料的致密性，从而提高其强度；六硼化镧的存在有利于促进氮化硅转变高硬度的陶瓷，进一步提高所述氮化硅陶瓷材料的强度，各组分协同作用，最终获得兼具高强度的高导热氮化硅陶瓷材料。
High-thermal-conductivity silicon nitride ceramic material as well as preparation method and application thereof
According to the preparation method of the high-thermal-conductivity silicon nitride ceramic material, all the components are uniformly mixed through ball milling, the comprehensive performance of the prepared material is improved, all the components are subjected to compression molding through compression molding, follow-up sintering is facilitated, and in the sintering process, a liquid phase is generated through silicon nitride, magnesium oxide and yttrium oxide, so that the high-thermal-conductivity silicon nitride ceramic material is obtained. The crystal lattice oxygen content of the silicon nitride ceramic material is reduced, and the crystal grain growth is promoted by utilizing a dissolution-precipitation mechanism, so that the heat conductivity of the silicon nitride ceramic material is favorably improved; the introduction of the carbon nanotubes can reduce the oxygen content in the material and further improve the thermal conductivity, and the carbon nanotubes can improve the compactness of the silicon nitride ceramic material, thereby improving the strength of the silicon nitride ceramic material; the existence of lanthanum hexaboride is beneficial to promoting conversion of silicon nitride into high-hardness ceramic, the strength of the silicon nitride ceramic material is further improved, and all the components have a synergistic effect, so that the high-thermal-conductivity silicon nitride ceramic material with high strength is finally obtained.
本发明提供了一种高导热氮化硅陶瓷材料的制备方法，通过球磨使得各组分混合均匀，有利于提高制备的材料的综合性能，通过模压成型将各组分压制成型，并有利于后续烧结的进行，在烧结过程中，通过氮化硅、氧化镁和氧化钇生成的液相，降低所述氮化硅陶瓷材料的晶格氧含量，并且利用溶解‑析出机制促进晶粒生长，有利于提高所述氮化硅陶瓷材料的热导率；碳纳米管的引入，能够降低材料中氧含量，并进一步改善导热率，且碳纳米管可以提高所述氮化硅陶瓷材料的致密性，从而提高其强度；六硼化镧的存在有利于促进氮化硅转变高硬度的陶瓷，进一步提高所述氮化硅陶瓷材料的强度，各组分协同作用，最终获得兼具高强度的高导热氮化硅陶瓷材料。
High-thermal-conductivity silicon nitride ceramic material as well as preparation method and application thereof
一种高导热氮化硅陶瓷材料及其制备方法和应用
XIAO LIANG (Autor:in) / QIAN LIHONG (Autor:in) / TAN HAOWEN (Autor:in) / TAN QINGWEN (Autor:in) / XIE QINGZHONG (Autor:in)
16.12.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
High-thermal-conductivity silicon nitride ceramic material and preparation method thereof
| Europäisches Patentamt | 2021
High-thermal-conductivity silicon nitride ceramic and preparation method thereof
| Europäisches Patentamt | 2020
High-thermal-conductivity silicon nitride ceramic substrate and preparation method thereof
| Europäisches Patentamt | 2021
| Europäisches Patentamt | 2020
| Europäisches Patentamt | 2022