Abstract:
PURPOSE: A porous cordierite ceramic honeycomb, and a manufacturing method thereof are provided to use cordierite synthesized from fly ash, for offering the high mechanical property, pore property, and extrudability. CONSTITUTION: A manufacturing method of a porous cordierite ceramic honeycomb comprises the following steps: synthesizing cordierite using fly ash; dry-sintering the cordierite and crushing; mixing graphite powder and an additive as a molding aid to the cordierite powder, to form a mixture; mixing mixture; extrude-molding the mixture to form a honeycomb body; and dry-plasticizing the honeycomb body.
Abstract:
본 발명은 단순한 공정으로 경제적이고 안전하게 대량생산할 수 있는 이산화티타늄 나노구조체의 제조방법을 구현하기 위하여, 이산화티타늄 및 수산화칼륨을 포함하는 수용액을 제공하는 단계; 및 상기 수용액에 마이크로웨이브를 조사하여 이산화티타늄 나노결정을 형성하는 단계;를 구비하는, 이산화티타늄 나노구조체의 제조방법이 제공된다.
Abstract:
본 발명은 이산화티타늄를 대체할 수 있으면서 공정상 빠르고 안전한 우수한 물성을 갖는 반도체 화합물의 제조방법 및 그 제조물질을 구현하기 위하여, 이산화티타늄, 카드뮴전구체, 3-메르캅토프로피온산 및 물을 혼합한 혼합용액을 제공하는 단계 및 혼합용액에 마이크로웨이브를 조사하여 이산화티타늄과 황화카드뮴이 결합된 반도체 화합물을 형성하는 단계를 포함하는 반도체 화합물의 제조방법을 제공한다.
Abstract:
The present invention provides a method for manufacturing a foamed glass that has low density and uniform pore distribution by using a waste glass in a simple process without a melting of glass, hydrolysis, or other pre-processes. The method for manufacturing the foamed glass according to an embodiment of the present invention includes a step of preparing the waste glass; a step of adding a bubble forming agent for forming bubbles on the waste glass through a chemical reaction and an oxygen supply agent and forming a pulverized glass by pulverizing the waste glass; a step of forming a molded glass by molding the pulverized glass; and a step of forming the foamed glass including bubbles by heating the molded glass. [Reference numerals] (S10) Preparing waste glass; (S20) Forming a first pulverized glass by firstly pulverizing the waste glass; (S30) Adding a chemical reaction and an oxygen supply agent in the first pulverized glass; (S40) Forming a second pulverized glass by secondly pulverizing the first pulverized glass in which the chemical reaction and the oxygen supply agent are added; (S50) Drying the second pulverized glass; (S60) Molding the dried second pulverized glass; (S70) Forming a glass molding material by molding the second pulverized glass; (S80) Forming a foamed glass by heating the molded glass
Abstract:
본 발명은 다공성 코디어라이트(cordierite)/지르코니아(zirconia) 세라믹 허니컴(ceramic honeycomb) 제조방법에 관한 것이다. 본 발명의 다공성 코디어라이트/지르코니아 세라믹 허니컴은, 코디어라이트 분말에 기계적 특성의 증진을 위한 지르코니아 분말, 기공 형성을 위한 흑연 분말 및 성형조제용 첨가제를 혼합하여 혼합물을 만들고 상기 혼합물을 성형하여 허니컴 성형체를 제조한 후 상기 허니컴 성형체를 건조 및 소성하여 제조되는 것을 특징으로 한다. 따라서, 우수한 기공 특성, 기계적 특성 및 압출성형성을 갖는 세라믹 허니컴을 원활히 제조할 수 있는 효과가 있다. 코디어라이트, 지르코니아, 흑연, 강도, 기공, 압출성형, 다공성, 세라믹, 허니컴, 필터
Abstract:
본 발명은 일반적으로 사용되어 지는 판유리, 병유리 등의 파쇄분 폐유리를 이용하여 발포유리를 제조하는 것으로 기공 형성을 위한 첨가물 없이 폐유리를 직접 발포시키는 방법에 관한 것이다. 본 발명에서 사용하는 발포용 원료분말은 폐유리를 이용하여 분쇄공정을 통하여 얻어진다. 습식 분쇄공정에 있어 용매로는 물, 에틸 알코올, 메틸 알코올, 아세톤 등을 이용하였으며, 분쇄된 분말은 성형몰드에 체밀 충전하여 일축 또는 정수압 성형을 행한 후, 600~1000℃의 온도구간에서 발포시켰으며, 발포공정 후 만들어진 발포유리는 심미성 및 균일한 미세 기공구조를 가지는 발포유리를 제조하였다. 발포유리의 기본적인 물성은 287 ㎏/㎥의 밀도 값과 88%의 기공율, 1.4 MPa의 압축강도, 그리고 25℃에서 0.070 kcal/mh℃ 열전도도를 나타내는 특성을 나타내었다. 이와 같은 본 발명은 건축용 경량 내화재, 방음재 등으로 이용되고 경량이어서 취급이 용이하다.
Abstract:
PURPOSE: A method for predicting the foaming interval of glass using an expansion coefficient measuring device is provided to make a process control and a process optimization by exactly predicting the forming interval of glass using an expansion coefficient measuring device. CONSTITUTION: A method for predicting the foaming interval of glass using an expansion coefficient measuring device comprises the following steps. The curve showing a temperature rising speed, a maintaining time and an expansion and shrinkage according to the change of a cooling speed is obtained using an expansion coefficient measuring device. The optimal rising speed of foam glass is obtained by observing the change of expansion and shrinkage according to the adjustment of the rising speed. The exact maintaining time is obtained by observing the change of expansion and shrinkage according to the change of the maintaining time. The exact cooling speed is predicted by observing the expansion and shrinkage according to the adjustment of the cooling speed.
Abstract:
PURPOSE: A method for manufacturing foamed glass using waste glass is provided to obtain the foamed glass by implementing a pulverizing process and a pyrolyzing process without the addition of a pore forming agent. CONSTITUTION: Sodium and boro alumino-silicate-based waste glass is prepared as a starting material for foamed glass. The waste glass is pulverized to be of a size between 1 and 10um. The pulverized waste glass powder is milled for 1-72 hours. The milled waste glass powder is compressed in a mold without the addition of a foaming agent to obtain a molded body. The molded body is sintered and foamed at a temperature between 600 and 1000°C. The density of the foamed glass is 287kg/m^3. The porosity of the foamed glass is 88%. The compressive intensity of the foamed glass is 1.4MPa. The thermal conductivity of the foamed glass at 25°C is 0.070kcal/mh°C.
Abstract:
PURPOSE: A porous cordierite/zirconia ceramic honeycomb, and its manufacturing method are provided to obtain the optimum porosity and the uniform distribution of pores. CONSTITUTION: A method for manufacturing a porous cordierite/zirconia ceramic honeycomb comprises the steps of (S10) mixing a cordierite powder with a zirconia powder, a PMMA (polymethyl methacrylate) powder for the formation of pores and an additive for molding aid to prepare a mixture; (S20) blending the mixture; (S30) extrusion molding the mixture to prepare a honeycomb molded product; and (S40) drying and sintering the honeycomb molded product to finish the ceramic honeycomb.