http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
한정용 한국기초조형학회 2023 기초조형학연구 Vol.24 No.2
The purpose of this study is to examine garnet, which is widely used as a material for industrial abrasives, construction materials, and filter media, and then to investigate the effectiveness of clay containing garnet. In this experiment, garnet is not in a lump state, but in the state of garnet sand or powder. Garnet is a silicate mineral whose main components are silicon dioxide (SiO2), aluminum oxide (Al2O3), and iron(III) oxide (Fe2O3), although it varies depending on the type, and contains trace amounts of magnesium (Mg), calcium (Ca), and manganese (Mn). The chemical composition of garnet was considered to be a material that could be used for clay for pottery, as glass components(SiO2) and alumina components(Al2O3), which were similar to those of clay, occupied a large proportion. The garnet used in the experiment is mainly red due to the influence of Fe2O3 contained in a large amount, and after firing it develops close to black. The experiment was carried out in a way to increase and mix the ratio of garnet to the basic clay. As a result of examining the chromaticity and physical properties of the fired specimens, unique color and texture changes were confirmed. As a result of oxidative firing, the clay with garnet added showed relatively stable color development and surface texture changes. As a result of reduction firing, in the case of specimens with an added amount of garnet of 10% or more, garnet melted, bloating occurred on the surface, and problems such as contaminating silicon carbide plates. In the trial production study that followed, clay planters with thick and simple shapes, teaware with thin walls, and tile bricks that can be used as interior and exterior materials for construction were produced. Through the production of prototypes, it was seen that garnet has sufficient useful value as a clay additive, and if used well, it is considered to be useful in making pottery with a unique personality.
金明建,韓正龍 단국대학교 1988 論文集 Vol.22 No.-
It has been known that the nitrogen adsorption technique is of great value for the determination of pore size distribution of porous materials. The Kelvin equation plays a central role in pore analysis. However, in the previous methods of calculating pore size distribution from adsorption isotherm, the influence of curvatures on the value of surface tension in the Kelvin equation has not been taken into account. In this work, an improved method with the curvature dependency of surface tension taken in to consideraion has been proposed. For illustrative purposes, the pore size distributions by the use of the method are calculated from the nitrogen adsorption isotherms on the international common manganes dioxides. The cumulative surface areas obtained from the calculations are compared with the BET values used as a criterion for the vali dity of calculated results. From this comparison, it is shown that the method of calculation is more precise.