MANUFACTURE METHOD OF CERAMICS SINTERED BODY

• Main Author: PARK, BYUNG OK
• Format: Patent
• Language: English; Korean
• Published: 14.08.2020
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; PERFORMING OPERATIONS; REFRACTORIES; SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER; SLAG; TRANSPORTING; TREATMENT OF NATURAL STONE; WORKING CEMENT, CLAY, OR STONE

Disclosed is a method for manufacturing a sintered body of low-temperature sintered lightweight porous ceramics. According to the present invention, the method comprises: a base material mixing step of mixing a ceramic base material including 50-80 parts by weight of white clay, 20-50 parts by weight of clay, and 10-30 parts by weight of decomposed granite with 5-20 parts by weight of nanosilica solution or powder including 5-20 parts by weight of alkali materials; a base material kneading and aging step of uniformly kneading and aging the ceramic base material mixed with 10-20 parts by weight of water; a base material forming step of inputting the kneaded and aged ceramic base material into a mold to perform press-molding or inputting the same into an extruder to perform extrusion molding; a molded product drying step of drying a molded product at 50-150°C for 2-72 hrs; and a molded product sintering step (S5) of sintering a dry molded product at 900-1,050°C for 10-36 hrs. Accordingly, the sintering temperature of a ceramic material is lowered, and thus energy required for sintering is reduced. Moreover, since pores are formed inside a sintered material, the weight of the sintered material is reduced and thermal conductivity is reduced, thereby maximizing insulation performance. 본 발명은 백토 50 ~ 80 중량부, 점토 20 ~ 50 중량부, 마사 10 ~ 30 중량부로 이루어진 세라믹 소지에 알카리가 5 ~ 20 중량부 함유된 나노실리카졸 또는 나노실리카분말 5 ~ 20 중량부를 혼합하여 세라믹소지를 혼합하는 소지혼합단계, 수분 10 ~ 20 중량부로 혼합된 세라믹 소지를 균일하게 반죽하고 숙성하는 소지반죽 및 숙성단계, 반죽 숙성된 세라믹 소지를 성형틀에 넣고 가압하여 성형하거나 또는 토련기에 투입하여 압출성형하는 소지 성형단계, 성형품을 50 ~ 150℃ 온도에서 2 ~ 72 시간 건조하는 성형품 건조단계, 건조된 성형품을 900 ~ 1050℃의 온도에서 10 ~ 36 시간 소성하는 성형품 소성단계(S5)로 구비되어 세라믹 소재의 소결 온도를 낮추어 소결에 필요한 에너지를 절감하고 소결재 내부에 기공을 만들어 소결재의 무게를 경량화 하며 열전도율을 낮추어 단열성능을 극대화 시킬 수 있는 저온소결 경량 다공세라믹 소결재 제조방법이 개시된다.