Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Novel preparation method for zirconium boride (ZrB2) ceramic precursor
The invention relates to a novel ultrahigh-temperature-resistant zirconium boride (ZrB2) ceramic precursor and a preparation method thereof. A zirconium boride polymer precursor with good performances can be obtained by adopting a two-step reaction comprising the following steps: step 1, preparing an organic zirconium polymer with zirconium oxychloride, ortho-hydroxybenzyl alcohol and triethylamine as raw materials; and step 2, subjecting the organic zirconium polymer and boric acid in an ethanol solution to reaction for 10 h under heating (at 50 to 80 DEG C), and carrying out rotary evaporation to remove a solvent so as to obtain a polymer of the zirconium boride precursor. According to the invention, molecular-level uniform dispersion of Zr and B constituent elements in precursor resin is realized; the prepared ZrB2 ceramic precursor can stably stay in air, is soluble in a variety of common organic solvents and has a good processing property; and after heat treatment, the precursor can be converted into ultrahigh-temperature ceramic zirconium boride at a low temperature of 1500 DEG C. The ZrB2 ceramic precursor prepared by using the method in the invention can be used as a ceramic-based composite material and a C/C composite material impregnant so as to improve working temperature of a C/C composite material.
Novel preparation method for zirconium boride (ZrB2) ceramic precursor
The invention relates to a novel ultrahigh-temperature-resistant zirconium boride (ZrB2) ceramic precursor and a preparation method thereof. A zirconium boride polymer precursor with good performances can be obtained by adopting a two-step reaction comprising the following steps: step 1, preparing an organic zirconium polymer with zirconium oxychloride, ortho-hydroxybenzyl alcohol and triethylamine as raw materials; and step 2, subjecting the organic zirconium polymer and boric acid in an ethanol solution to reaction for 10 h under heating (at 50 to 80 DEG C), and carrying out rotary evaporation to remove a solvent so as to obtain a polymer of the zirconium boride precursor. According to the invention, molecular-level uniform dispersion of Zr and B constituent elements in precursor resin is realized; the prepared ZrB2 ceramic precursor can stably stay in air, is soluble in a variety of common organic solvents and has a good processing property; and after heat treatment, the precursor can be converted into ultrahigh-temperature ceramic zirconium boride at a low temperature of 1500 DEG C. The ZrB2 ceramic precursor prepared by using the method in the invention can be used as a ceramic-based composite material and a C/C composite material impregnant so as to improve working temperature of a C/C composite material.
Novel preparation method for zirconium boride (ZrB2) ceramic precursor
XIANG ZHI-MEI (Autor:in) / TAO XUE-YU (Autor:in) / QIAO ZHENG (Autor:in) / CHANG QIANG (Autor:in) / QIU WEN-FEN (Autor:in)
25.11.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
Preparation method of ZrB2-SiC composite ceramic precursor
| Europäisches Patentamt | 2022
| Europäisches Patentamt | 2023
SiC/ZrC/ZrB2 composite ceramic precursor polyboron zirconium carbosilane and application thereof
| Europäisches Patentamt | 2024
Zirconium boride-based porous ultrahigh-temperature ceramic preparation method
| Europäisches Patentamt | 2024
Preparation method of densified zirconium boride-silicon carbide composite ceramic
| Europäisches Patentamt | 2021