A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
MANUFACTURING METHOD OF GRAPHENE-CERAMIC COMPOSITES WITH EXCELLENT FRACTURE TOUGHNESS
The present invention relates to a method for producing a graphene-ceramic composite, the method comprising the steps of: (a) preparing graphene oxide; (b) producing a graphene oxide dispersion liquid by exfoliating the graphene oxide in a polar solvent including water by using ultrasonic waves; (c) producing a reduced material suspension of the graphene oxide by reducing the graphene oxide after adding hydrazine monohydrate in the graphene oxide dispersion liquid; (d) preparing alumina powder and zirconia powder; (e) producing ceramic slurry by mixing the alumina powder and zirconia powder in a polar solvent; (f) adding and mixing the ceramic slurry in the reduced material suspension of the graphene oxide; (g) drying and molding a mixture produced therefrom; and (h) sintering a molded material produced therefrom. According to the present invention, a graphene-alumina-zirconia composite having high fracture toughness, bending strength, and wear resistance can be easily produced.
본 발명은, (a) 산화그래핀을 준비하는 단계와, (b) 상기 산화그래핀을 초음파를 이용하여 물을 포함하는 극성용매에서 박리하여 산화그래핀 분산액을 형성하는 단계와, (c) 상기 산화그래핀 분산액에 하이드라진 하이드레이트(hydrazine monohydrate)를 첨가하여 상기 산화그래핀을 환원시켜 산화그래핀의 환원물 현탁액을 형성하는 단계와, (d) 알루미나 분말과 지르코니아 분말을 준비하는 단계와, (e) 알루미나 분말과 지르코니아 분말을 극성용매에 혼합하여 세라믹 슬러리를 형성하는 단계와, (f) 상기 세라믹 슬러리를 상기 산화그래핀의 환원물 현탁액에 첨가하여 혼합하는 단계와, (g) 혼합된 결과물을 건조하고 성형하는 단계 및 (h) 상기 성형에 의해 형성된 성형체를 소결하는 단계를 포함하는 그래핀-세라믹 복합체의 제조방법에 관한 것이다. 본 발명에 의하면, 높은 파괴인성, 굽힘강도 및 내마모성을 갖는 그래핀-알루미나-지르코니아 복합체를 용이하게 제조할 수 있다.
MANUFACTURING METHOD OF GRAPHENE-CERAMIC COMPOSITES WITH EXCELLENT FRACTURE TOUGHNESS
The present invention relates to a method for producing a graphene-ceramic composite, the method comprising the steps of: (a) preparing graphene oxide; (b) producing a graphene oxide dispersion liquid by exfoliating the graphene oxide in a polar solvent including water by using ultrasonic waves; (c) producing a reduced material suspension of the graphene oxide by reducing the graphene oxide after adding hydrazine monohydrate in the graphene oxide dispersion liquid; (d) preparing alumina powder and zirconia powder; (e) producing ceramic slurry by mixing the alumina powder and zirconia powder in a polar solvent; (f) adding and mixing the ceramic slurry in the reduced material suspension of the graphene oxide; (g) drying and molding a mixture produced therefrom; and (h) sintering a molded material produced therefrom. According to the present invention, a graphene-alumina-zirconia composite having high fracture toughness, bending strength, and wear resistance can be easily produced.
본 발명은, (a) 산화그래핀을 준비하는 단계와, (b) 상기 산화그래핀을 초음파를 이용하여 물을 포함하는 극성용매에서 박리하여 산화그래핀 분산액을 형성하는 단계와, (c) 상기 산화그래핀 분산액에 하이드라진 하이드레이트(hydrazine monohydrate)를 첨가하여 상기 산화그래핀을 환원시켜 산화그래핀의 환원물 현탁액을 형성하는 단계와, (d) 알루미나 분말과 지르코니아 분말을 준비하는 단계와, (e) 알루미나 분말과 지르코니아 분말을 극성용매에 혼합하여 세라믹 슬러리를 형성하는 단계와, (f) 상기 세라믹 슬러리를 상기 산화그래핀의 환원물 현탁액에 첨가하여 혼합하는 단계와, (g) 혼합된 결과물을 건조하고 성형하는 단계 및 (h) 상기 성형에 의해 형성된 성형체를 소결하는 단계를 포함하는 그래핀-세라믹 복합체의 제조방법에 관한 것이다. 본 발명에 의하면, 높은 파괴인성, 굽힘강도 및 내마모성을 갖는 그래핀-알루미나-지르코니아 복합체를 용이하게 제조할 수 있다.
MANUFACTURING METHOD OF GRAPHENE-CERAMIC COMPOSITES WITH EXCELLENT FRACTURE TOUGHNESS
파괴인성이 우수한 그래핀-세라믹 복합체의 제조방법
KIM JONG YOUNG (author) / KIM HYO JIN (author) / CHO WOO SEOK (author) / KIM UNG SOO (author) / PEE JAE HWAN (author) / LEE EUN SIL (author)
2015-07-06
Patent
Electronic Resource
Korean
IPC:
C04B
Kalk
,
LIME
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