A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for rapidly preparing high-performance Si3N4 ceramic ball at low cost
The invention discloses a method for rapidly preparing a high-performance Si3N4 ceramic ball at low cost. The method comprises the following steps: (1) with Si powder as a raw material, TiO2 powder as a nitridation catalyst and an additive for improving the performance of the ceramic ball, and Al2O3-Re2O3 as an assistant, wherein Re is any one of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, mixing and drying Si, TiO2, Al2O3 and Re2O3 at the mass fraction ratio of (56%-99.44%) to (0.22%-17.44%) to (0.17%-13.3%) to (0.17%-13.3%) to obtain Si-TiO2-Al2O3-Re2O3 mixed powder; (2) pelleting the Si-TiO2-Al2O3-Re2O3 powder through a spray drying technology, putting into a mold, and molding the ceramic ball to obtain a ceramic ball blank through a cold isostatic pressing technology; and (3) processing the Si-TiO2-Al2O3-Re2O3 ceramic ball blank by virtue of a two-step heat preservation method and carrying out gas-pressure sintering to prepare the high-performance Si3N4 ceramic ball. The method is low in cost and high in efficiency; and the performance of the Si3N4 ceramic ball can be improved.
Method for rapidly preparing high-performance Si3N4 ceramic ball at low cost
The invention discloses a method for rapidly preparing a high-performance Si3N4 ceramic ball at low cost. The method comprises the following steps: (1) with Si powder as a raw material, TiO2 powder as a nitridation catalyst and an additive for improving the performance of the ceramic ball, and Al2O3-Re2O3 as an assistant, wherein Re is any one of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, mixing and drying Si, TiO2, Al2O3 and Re2O3 at the mass fraction ratio of (56%-99.44%) to (0.22%-17.44%) to (0.17%-13.3%) to (0.17%-13.3%) to obtain Si-TiO2-Al2O3-Re2O3 mixed powder; (2) pelleting the Si-TiO2-Al2O3-Re2O3 powder through a spray drying technology, putting into a mold, and molding the ceramic ball to obtain a ceramic ball blank through a cold isostatic pressing technology; and (3) processing the Si-TiO2-Al2O3-Re2O3 ceramic ball blank by virtue of a two-step heat preservation method and carrying out gas-pressure sintering to prepare the high-performance Si3N4 ceramic ball. The method is low in cost and high in efficiency; and the performance of the Si3N4 ceramic ball can be improved.
Method for rapidly preparing high-performance Si3N4 ceramic ball at low cost
GUO WEIMING (author) / WU LIXIANG (author) / LIN HUATAI (author)
2015-09-16
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
Method for preparing Si3N4-O'-Sialon-TiN ceramic ball material
| European Patent Office | 2016
Method for preparing Si3N4/BAS composite ceramic material
| European Patent Office | 2015
High-performance Si3N4 ceramic substrate and preparation method thereof
| European Patent Office | 2024