• 한국재료학회지
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• 제32권8호
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• pp.354-360
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• 2022

In this study, an Co/Fe coated porcelain using a cobalt and ferrous sulfate was sintered at 1,250 ℃. The specimens were investigated by HR-XRD, FE-SEM (EDS), Dilatometer, and UV-vis spectrophotometer. The surface of the porcelain was uniformly fused with the pigment, and white ware and celadon body specimens were densely fused to a certain thickness from the surface. Other new compounds were produced by the chemical reaction of cobalt/ferrous sulfate with the porcelain body during the sintering process. These compounds were identified as cobalt ferrite spinel phases for white ware and white mixed ware, and an andradite phase for the celadon body, and the amorphous phase, respectively. As for the color of the specimens coated with cobalt and ferrous mixed pigments, it was found that the L^* value was greatly affected by the white ware, and the a^* and b^* values were significantly changed in the celadon body. The L^* values of the specimens fired with pure white ware, celadon body, and white mix ware were 72.1, 60.92, 82.34, respectively. The C7F3 pigment coated porcelain fired at 1,250 ℃ had L^* values of 39.91, 50.17, and 40.53 for the white ware, celadon body, and white mixed ware, respectively; with a^* values of -1.07, -2.04, and -0.19, and at b^* values of 0.46 and 6.01, it was found to be 4.03. As a new cobalt ferrite spinel phase was formed, it seemed to have had a great influence on the color change of the ceramic surface.

• 대한안전경영과학회지
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• 제7권4호
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• pp.229-248
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• 2005

The purpose of this study is to identify the best firing condition for Celadon, which is one of the famous traditional pottery to represent Korean culture, by minimizing energy consumption, cutting firing time, shortening the time of processing ceramic making, in order to, save energy as well as to protect the potters' health. Most Korean potter starts their reduction from $950^{\circ}C$ to change kiln atmosphere. However on this study, reduction have started from $950^{\circ}C\;to\;1200^{\circ}C$ by increasing $50^{\circ}C$ at a time. Then the results are analyzed to be compared to previous Celadon, in colors, chroma, and brightness. As a results, it is found, that the best temperature for starting reduction is $1100^{\circ}C$, when chroma and brightness values to meet same with previous celadon. Therefore the best condition could be made by starting the reduction on $1100^{\circ}C$ to fire celadon, which would have shorten 2 hours of firing process and, at the same time, it could have saved the energy by 12%.

• 한국재료학회지
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• 제31권11호
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• pp.608-613
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• 2021

This study investigated the reaction between clay and Mn. Mn was coated using a manganese sulfate on porcelain plate and sintered from 1,100 ℃ to 1,250 ℃. The body begin to shrink around 950 ℃ with the increase in temperature and rapidly progressed after 1,100 ℃. Shrinkage of celadon body was performed at a lower temperature than for other substrates. Quartz, kaolin, and feldspar were the main crystalline phases of the starting materials, but they became mullite and crystobalite during the firing process, and some formed amorphous glass. When manganese sulfate was applied and fired, manganese oxide was fused, and some manganese oxide reacted with the substrate to show a dense microstructure different from that of the substrate; the substrate had pores. The manganese coated porcelain fired at 1,200 ℃ had L^* values of 55.25, 36.87, and 37.13 for the white ware, celadon body, and white mixed ware, respectively; with a^* values of 4.63, 3.07, and 2.15, and b^* values of 7.93 and 3.98, it was found to be 3.42. This result indicated that the color of the surface was affected during firing by the chemical reaction between the substrate and manganese.

• Bulletin of the Korean Chemical Society
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• 제23권11호
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• pp.1531-1540
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• 2002

With the invention of the inlaying technique for celadon in the latter half of the 12th century, the Koryo potters reached a new height of artistic and scientific achievement in ceramics chemical technology. Inlaid celadon shards, collected in 1991 during the surface investigation of Kangjin kilns found on the southwestern shore of South Korea, were imbedded in epoxy resin and polished for cross-section examination. Backscattered electron images were taken with an electron microprobe equipped with an energy dispersive spectrometer. The spectrometer was also used to determine the composition of micro-areas. Porcelain stone, weathered rock of quartz, mica, and feldspar composition were found to be the raw material for the body and important components in the glaze and white inlay. The close similarity between glaze and black inlay in the microstructure suggests that the glaze material was modified by adding clay with high iron content, such as biotite, for use as black inlay. The deep soft translucent quality of celadon glaze is brought about by its microstructure of bubbles, remnant and devitrified minerals, and the schlieren effect.

• 한국결정성장학회지
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• 제21권2호
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• pp.87-91
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• 2011

본 연구에서는 우리나라의 도자기 제조업체가 밀집되어 있는 경기도 이천, 여주 지역에서 발생되는 백자, 청자, 본차이나 폐도자기를 도자기 유약용 원료로서 재활용하여 도자기 제조에 적합한 도자기 유약를 개발해 보고자 한다. 연구결과, 폐백자분에는 규석이 많이 함유되어 있어서 규석을 사용하지 않고서도 맑고 투명한 백자 유약을 만들 수 있다. 또한 폐청자분에는 $Fe_2O_3$이 많이 함유되어 있어서 청자유약제조에 적합하였다. 폐본차이나분에는 $P_2O_5$이 많이 함유되어 있어서 부드러운 느낌의 유백유약제조에 적합하였다. 이와같이 폐도자기를 사용하여 도자기 유약를 제조함에 의해 매립에 의해 발생되는 환경 문제를 해결함과 동시에 자원의 재활용, 특히 일부 수입되고 있는 도자기 원료의 대체원료로서의 활용도 기대되어 경제적 효과도 얻을 수 있을 것으로 판단된다.

• 한국결정성장학회지
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• 제33권5호
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• pp.174-180
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• 2023

본 연구는 백자와 청자 소지에 철/코발트 황하물의 안료를 시유하여 1250℃에서 소성한 도자기 표면의 상형성을 연구하였다. 시편의 특성은 X-선 회절분석기, 전계방사형 주사전자현미경, 에너지 분산형 엑스선분석기 및 UV-vis 분광계를 이용하였다. X-선 리트벨트 정밀화 분석으로 백자소지는 석영과 뮬라이트가, 청자소지는 뮬라이트와 plagioclase가 주 결정상이다. 백자와 청자소지에 철/코발트 황하물의 안료를 시유한 경우 백자는 스피넬상이 청자는 andradite 상의 이차상이 형성되었다. 시편 소지의 색상은 밝기인 L^* 값은 백자와 청자소지가 72.01, 60.92이고 백자가 청자소지 보다는 백색도가 높다. 철/코발트 황하물의 안료를 도포한 시편에서 백자와 청자 시편의 경우, L^* 값은 44.89, 52.27, a^* 값은 2.12, 1.40, b^* 값은 1.4 5, 13.79를 각각 보이고 있다. L^* 값은 백자소지에 안료를 도포한 시편에서 큰 변화가 있으며, b^* 값은 소지에 따라 크게 차이가 나는 것을 알 수가 있다. 이는 표면층에 생성되는 Fe₂O₃ 상과 andradite 결정상 생성과 밀접한 관련이 있다.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2005년도 추계학술대회
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• pp.255-263
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• 2005

• 수완나부미
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• 제2권1호
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• pp.1-16
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• 2010

Vietnamese Blue and White Porcelain is famous for its unique form and colour of cobalt. It is said to be producted from the late of 14th Century to now. Vietnamese Blue and White Porcelain of 14th Century has a Mum design similar to that of Blue and White Porcelain of 14th Century in China. The Vietnamese Blue and White Porcelain of 15th, 16th Century was trade Ceramics which were shipped overseas. A base, having a dated inscription corresponding to 1450 and kept in the Topkapi Saray Museum is the best example of Vietnamese trade ceramics. The Vietnamese Blue and White Porcelain of 15th, 16th Century was a substitute for Chinese trade ceramics in these times when China had a police of the closure of China borderers to sea trade to protect China and was exported to the western Asia and the Southeast Asia. In recent, Fustat relics of Egypt was excavated the Vietnamese Blue and White Porcelain. It means that Vietnamese Ceramics of 15th, 16th Century was substitute for Chinese trade ceramics. In addition, Thai Blue celadon of 15th Century was exported to the western Asia as like Vietnamese Blue and White Porcelain. But when a police of the closure of China borderers to sea trade in China was stopped in the late of 16th Century and Chinese Ceramics were reborn in the same time, the Vietnamese Blue and White Porcelain was declined as trade items.

• 한국결정성장학회지
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• 제24권6호
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• pp.256-260
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• 2014

본 연구는 코발트 코팅 두께에 따른 점토 표면과의 반응성을 연구하였다. 시편에서 표면으로 부터 일정한 두께로 코발트가 확산된 것을 볼 수가 있으며, 황화코발트의 도포양과 함께 청자토보다 백자토에서 확산층의 두께가 증가하였다. 백자토에 코팅된 시편은 grayish blue가 blue 색으로 변화되는 것을 알 수 있으며 $L^*$값이 51.78에서 37.61로 감소하고, 청자토에 코팅된 시편인 경우 dark olive gray에서 dark gray색으로 $L^*$값이 53.91에서 38.93로 적어지는 것을 알 수가 있다. 시편의 물성 평가는 XRD, SEM, 열팽창기, TG-DTA, UV-vis spectrophotometer와 HRDPM을 이용하였다.

• 한국식생활문화학회지
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• 제18권6호
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• pp.536-543
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• 2003

The Chosun Dynasty in the $18^{th}$ century was a period of revival for science, art, and culture, bringing about Silhak(practical science), a new trend in the history of Chosun thoughts. In the history of fine arts, realistic landscape paintings and genre paintings were popular as realism became prevalent. From the aspect of food culture, in particular, the luxurious and elegant Korean-styled food culture was completed during this period. Iwanwasuseoksihoedo was painted by Jeong Hwang (1735-1800) in 1789, depicting a banquet on an elder's $60^{th}$ birthday. It is classified as a genre painting in the late Chosun Period but it contains things that comes into our heart, which are white porcelain with blue celadon pictures, white porcelain bowls, busy atmosphere of a banqueting house where food is being carried in a hurry and elders' serene appearance. All these things show the abundance of life, the room and comfort of old ages, and the beauty and relish of life in the well-arranged living ground. Hoehonyedo was painted on an elder's $60^{th}$ marriage anniversary by an unknown artist presumably in the $18^{th}$ century is a painting as realistic as a documentary photograph. The work gives viewers pleasure and comfort because it describes not a mighty clan but the superb later years of an official who had lived right and upright life. In the aspect of food culture, it displays the food culture of the splendid sixtieth marriage anniversary of a Korean official through noble etiquette among family members, seat planning, unique table culture and high quality tableware including white porcelain with celadon pictures and pure white porcelain.