Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of alumina ceramic sintered at ultralow temperature
The invention relates to the technical field of preparation of aluminum oxide ceramics, in particular to a preparation method of ultralow-temperature sintered aluminum oxide ceramics, which comprises the following steps: S1.1, putting aluminum oxide powder and water into a ball mill filled with ballstones according to a ratio of (3-4): 1, and carrying out ball milling for 20-30 hours to obtain aluminum oxide grinding slurry with the specific gravity of 1.60-1.70; s1.2, B2O3-Li2O-Cr2O3-TiO2-SiO2 is selected as a sintering assisting system, and the B2O3-Li2O-Cr2O3-TiO2-SiO2 and the S1.3, heating 2-3wt% of Cardlan gum to dissolve the Cardlan gum, adding the Cardlan gum into the prepared aluminum oxide slurry, uniformly stirring, and injecting into an aluminum oxide ceramic mold; and S1.4, putting the baked aluminum oxide primary blank into a sintering kiln to form the aluminum oxide ceramic. Nano-modified silicon carbide is introduced into a mixed sintering assisting system, and a firm interface structure is formed between the nano-modified silicon carbide and an aluminum oxide matrix, so that cracks can be effectively prevented from being generated and expanded on an interface of nano-modified silicon carbide particles and the aluminum oxide matrix, and the bending strength of the composite material is improved.
本发明涉及氧化铝陶瓷制备技术领域，具体地说，涉及一种超低温烧结的氧化铝陶瓷的制备方法，包括以下步骤：S1.1、将氧化铝粉末和水以3～4：1的比例投入到装有球石的球磨机里进行球磨20～30小时得到氧化铝研磨浆，氧化铝研磨浆比重为1.60～1.70；S1.2、选择B2O3‑Li2O‑Cr2O3‑TiO2‑SiO2作为助烧体系，通过混料机混合均匀；S1.3、将2‑3wt％卡德兰胶加热使之溶解后加到制备的氧化铝料浆，搅拌均匀后注入氧化铝陶瓷的模具中；S1.4、将烘制完的氧化铝初胚放烧结窑形成氧化铝陶瓷。在混合后的助烧体系中引入纳米改性碳化硅，纳米改性碳化硅与氧化铝基体之间形成牢固的界面结构，可有效阻止裂纹在纳米改性碳化硅颗粒与氧化铝基体界面上的萌生与扩展，从而提高复合材料的抗弯强度。
Preparation method of alumina ceramic sintered at ultralow temperature
The invention relates to the technical field of preparation of aluminum oxide ceramics, in particular to a preparation method of ultralow-temperature sintered aluminum oxide ceramics, which comprises the following steps: S1.1, putting aluminum oxide powder and water into a ball mill filled with ballstones according to a ratio of (3-4): 1, and carrying out ball milling for 20-30 hours to obtain aluminum oxide grinding slurry with the specific gravity of 1.60-1.70; s1.2, B2O3-Li2O-Cr2O3-TiO2-SiO2 is selected as a sintering assisting system, and the B2O3-Li2O-Cr2O3-TiO2-SiO2 and the S1.3, heating 2-3wt% of Cardlan gum to dissolve the Cardlan gum, adding the Cardlan gum into the prepared aluminum oxide slurry, uniformly stirring, and injecting into an aluminum oxide ceramic mold; and S1.4, putting the baked aluminum oxide primary blank into a sintering kiln to form the aluminum oxide ceramic. Nano-modified silicon carbide is introduced into a mixed sintering assisting system, and a firm interface structure is formed between the nano-modified silicon carbide and an aluminum oxide matrix, so that cracks can be effectively prevented from being generated and expanded on an interface of nano-modified silicon carbide particles and the aluminum oxide matrix, and the bending strength of the composite material is improved.
本发明涉及氧化铝陶瓷制备技术领域，具体地说，涉及一种超低温烧结的氧化铝陶瓷的制备方法，包括以下步骤：S1.1、将氧化铝粉末和水以3～4：1的比例投入到装有球石的球磨机里进行球磨20～30小时得到氧化铝研磨浆，氧化铝研磨浆比重为1.60～1.70；S1.2、选择B2O3‑Li2O‑Cr2O3‑TiO2‑SiO2作为助烧体系，通过混料机混合均匀；S1.3、将2‑3wt％卡德兰胶加热使之溶解后加到制备的氧化铝料浆，搅拌均匀后注入氧化铝陶瓷的模具中；S1.4、将烘制完的氧化铝初胚放烧结窑形成氧化铝陶瓷。在混合后的助烧体系中引入纳米改性碳化硅，纳米改性碳化硅与氧化铝基体之间形成牢固的界面结构，可有效阻止裂纹在纳米改性碳化硅颗粒与氧化铝基体界面上的萌生与扩展，从而提高复合材料的抗弯强度。
Preparation method of alumina ceramic sintered at ultralow temperature
一种超低温烧结的氧化铝陶瓷的制备方法
ZHANG ZHONGMING (Autor:in) / LIU LILI (Autor:in) / GAO YUAN (Autor:in)
15.11.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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