Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of gas phase infiltration reinforced mullite ceramic material
The invention discloses a preparation method of a mullite ceramic material reinforced by a vapor infiltration method. The prepared mullite ceramic material is placed in a sagger filled with AlF33H2O powder, heat treatment is conducted for 6 hours at the temperature of 1600 DEG C, a gas-phase medium volatilizes and permeates into a mullite ceramic matrix, a gas-phase reaction is conducted, anisotropic growth of mullite crystal grains is promoted, mullite whiskers are generated, internal gaps of the ceramic material are filled with the mullite whiskers, the porosity of the ceramic material is reduced, and the performance of the ceramic material is improved. The volume density of the ceramic material is improved, and the high-temperature mechanical strength of mullite ceramic is enhanced. According to the present invention, with the gas phase permeation reinforcement mode, the residue of the low melting point chemical compound in the ceramic body is reduced, the air hole formed by the ablation of the auxiliary agent AlF3. 3H2O in the ceramic material is avoided, the mullite whisker can be formed in the ceramic structure to enhance the ceramic strength, the reinforcement effect is significant, and the high temperature breaking strength can be increased by 13-16% to the maximum.
本发明公开了一种气相渗入法增强莫来石陶瓷材料制备方法。将制备好的莫来石陶瓷材料置于装有AlF3•3H2O粉体匣钵内，在1600℃下热处理6个小时，气相介质挥发渗入到莫来石陶瓷基体内部，发生气相反应，促进莫来石晶粒的异向生长，生成莫来石晶须，莫来石晶须填充陶瓷材料内部空隙，降低陶瓷材料气孔率，提高陶瓷材料体积密度，增强莫来石陶瓷高温力学强度。气相渗入的增强方式减少了低熔点化合在陶瓷坯体中的残留，避免助剂AlF3·3H2O在陶瓷材料内部烧蚀形成的气孔，又能在陶瓷结构中形成莫来石晶须增强陶瓷强度，增强效果明显，高温抗折强度最高可提高13~16%。
Preparation method of gas phase infiltration reinforced mullite ceramic material
The invention discloses a preparation method of a mullite ceramic material reinforced by a vapor infiltration method. The prepared mullite ceramic material is placed in a sagger filled with AlF33H2O powder, heat treatment is conducted for 6 hours at the temperature of 1600 DEG C, a gas-phase medium volatilizes and permeates into a mullite ceramic matrix, a gas-phase reaction is conducted, anisotropic growth of mullite crystal grains is promoted, mullite whiskers are generated, internal gaps of the ceramic material are filled with the mullite whiskers, the porosity of the ceramic material is reduced, and the performance of the ceramic material is improved. The volume density of the ceramic material is improved, and the high-temperature mechanical strength of mullite ceramic is enhanced. According to the present invention, with the gas phase permeation reinforcement mode, the residue of the low melting point chemical compound in the ceramic body is reduced, the air hole formed by the ablation of the auxiliary agent AlF3. 3H2O in the ceramic material is avoided, the mullite whisker can be formed in the ceramic structure to enhance the ceramic strength, the reinforcement effect is significant, and the high temperature breaking strength can be increased by 13-16% to the maximum.
本发明公开了一种气相渗入法增强莫来石陶瓷材料制备方法。将制备好的莫来石陶瓷材料置于装有AlF3•3H2O粉体匣钵内，在1600℃下热处理6个小时，气相介质挥发渗入到莫来石陶瓷基体内部，发生气相反应，促进莫来石晶粒的异向生长，生成莫来石晶须，莫来石晶须填充陶瓷材料内部空隙，降低陶瓷材料气孔率，提高陶瓷材料体积密度，增强莫来石陶瓷高温力学强度。气相渗入的增强方式减少了低熔点化合在陶瓷坯体中的残留，避免助剂AlF3·3H2O在陶瓷材料内部烧蚀形成的气孔，又能在陶瓷结构中形成莫来石晶须增强陶瓷强度，增强效果明显，高温抗折强度最高可提高13~16%。
Preparation method of gas phase infiltration reinforced mullite ceramic material
一种气相渗入法增强莫来石陶瓷材料制备方法
ZHANG QI (Autor:in) / WANG GANG (Autor:in) / WANG QU (Autor:in) / ZHANG YIFAN (Autor:in) / LIANG PENGPENG (Autor:in) / DU PENGHUI (Autor:in) / WANG LAIWEN (Autor:in)
05.05.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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