Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-strength foamed ceramic and preparation method thereof
The invention discloses a high-strength foamed ceramic and a preparation method thereof, and the preparation method comprises the following steps: (1) preparing a foamed ceramic raw material and an auxiliary agent into slurry, and drying to prepare powder; in the auxiliary agent, silicon carbide is used as a foaming agent, chromic oxide and/or a substance containing chromic oxide are/is used as a nucleating agent, and inorganic chopped fibers are used as a reinforcing agent; (2) putting the powder into a mold, and sintering; and (3) after firing, cooling and demolding to obtain the high-strength foamed ceramic. According to the preparation method, Cr2O3 is adopted as a nucleation agent and is cooled to a crystallization temperature point for heat preservation, so that a glass phase in a matrix is promoted to form high-strength mullite and quartz crystals, the strength of the matrix is improved, formation and growth of pores in a melt at a high temperature are not affected, and the prepared foamed ceramic has a good pore structure and excellent mechanical properties.
本发明公开了一种高强度发泡陶瓷及其制备方法，所述制备方法包括以下步骤：(1)将发泡陶瓷原料和助剂制备成料浆，再经干燥制成粉料；所述助剂中，以碳化硅为发泡剂，以三氧化二铬和/或含三氧化二铬的物质为晶核剂，以无机短切纤维为增强剂；(2)将粉料置于模具中，烧成；(3)烧成后经冷却、拆模，得到高强度发泡陶瓷。本发明采用Cr2O3作为晶核剂，并在冷却至析晶温度点处保温，促进了基体内玻璃相的形成高强度的莫来石和石英晶体，既提升了基体的强度，又不影响高温下熔体内气孔的形成与生长，制得的发泡陶瓷具有良好的孔结构和优异的力学性能。
High-strength foamed ceramic and preparation method thereof
The invention discloses a high-strength foamed ceramic and a preparation method thereof, and the preparation method comprises the following steps: (1) preparing a foamed ceramic raw material and an auxiliary agent into slurry, and drying to prepare powder; in the auxiliary agent, silicon carbide is used as a foaming agent, chromic oxide and/or a substance containing chromic oxide are/is used as a nucleating agent, and inorganic chopped fibers are used as a reinforcing agent; (2) putting the powder into a mold, and sintering; and (3) after firing, cooling and demolding to obtain the high-strength foamed ceramic. According to the preparation method, Cr2O3 is adopted as a nucleation agent and is cooled to a crystallization temperature point for heat preservation, so that a glass phase in a matrix is promoted to form high-strength mullite and quartz crystals, the strength of the matrix is improved, formation and growth of pores in a melt at a high temperature are not affected, and the prepared foamed ceramic has a good pore structure and excellent mechanical properties.
本发明公开了一种高强度发泡陶瓷及其制备方法，所述制备方法包括以下步骤：(1)将发泡陶瓷原料和助剂制备成料浆，再经干燥制成粉料；所述助剂中，以碳化硅为发泡剂，以三氧化二铬和/或含三氧化二铬的物质为晶核剂，以无机短切纤维为增强剂；(2)将粉料置于模具中，烧成；(3)烧成后经冷却、拆模，得到高强度发泡陶瓷。本发明采用Cr2O3作为晶核剂，并在冷却至析晶温度点处保温，促进了基体内玻璃相的形成高强度的莫来石和石英晶体，既提升了基体的强度，又不影响高温下熔体内气孔的形成与生长，制得的发泡陶瓷具有良好的孔结构和优异的力学性能。
High-strength foamed ceramic and preparation method thereof
一种高强度发泡陶瓷及其制备方法
ZHOU MINGKAI (Autor:in) / CHEN XIAO (Autor:in) / WANG HUAIDE (Autor:in) / LIN FANGLIANG (Autor:in)
11.03.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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