• Clean Technology
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• v.17 no.2
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• pp.85-96
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• 2011

Self-healing materials are a class of smart materials that have the structurally incorporated ability to repair damage caused by mechanical usage over time. A material (polymers, ceramics, metals, etc.) that can intrinsically correct damage caused by normal usage could lower production costs of a number of different industrial processes through longer part lifetime, reduction of inefficiency over time caused by degradation, as well as prevent costs incurred by material failure. The recent announcement from Nissan on the commercial release of scratch healing paints for use on car bodies has gained public interest on such a wonderful property of materials. This article is a second part of healing materials dealing with inorganic engineering materials such as metals, ceramics, and concrete. The healing mechanisms developed for the inorganic materials are to be discussed with the future prospect.

• Proceedings of the Korea Contents Association Conference
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• 2003.05a
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• pp.298-302
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• 2003

Inorganic Crystal Structure Database, the essential information in the chemistry field for synthesis and property research of inorganic materials, has been constructed. The data source is obtained from the FIZ-Karlsruhe, about 65, 000 records of the coverage period is 1915 year to present. This paper describes the database schema and retrieval system of the Inorganic Crystal Structure Database designed for the speedy and efficient retrieval, especially developed into supporting numeric retrieval of the crystal structure cell parameter.

• Defense and Technology
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• no.7 s.245
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• pp.48-61
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• 1999

높은 비강도, 높은 사용 온도, 내식성, 내산화성, 비자성, 생산성 등이 동시에 구비된 타이타늄 합금은 지상, 해상 및 수중, 우주 항공 장비 등의 군사적으로 중요한 요구 사항을 만족시킬 수 있는 재료로 향후 무기체계 고기능화 및 고성능화에 부응할 수 있는 전략적으로 가장 중요한 재료에 속한다

• Proceedings of the Materials Research Society of Korea Conference
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• 2005.05a
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• pp.317-317
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• 2005

• Proceedings of the Materials Research Society of Korea Conference
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• 2008.05a
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• pp.25.1-25.1
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• 2008

• Proceedings of the Materials Research Society of Korea Conference
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• 2005.05a
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• pp.71-71
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• 2005

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2003.05a
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• pp.452-455
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• 2003

마이크로캡슐화 기술은 심물질, 캡슐의 벽재재료 및 후가공과 관련한 응용기술로 구성되어 있으며, 심물질로서는 다양한 종류의 기능성 물질을 적용할 수 있다. 벽막재료 또한 목적하는 마이크로캡슐의 용도에 따라서 고분자 물질이나 무기재료 등 적합한 재료를 쓸 수 있다. 이러한 기술을 통하여 심물질 자체의 단점들 예를 들면 열안정성, 광안전성, 분산성, 등을 대폭 개선할 수 있고, 또한 이 심물질의 이용시 가공방법의 한계 등을 보완할 수 있으며, 특히 서방성을 목적으로하는 경우에 적당한 가공방법이라고 할 수 있다.(중략)

• Polymer(Korea)
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• v.30 no.2
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• pp.129-134
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• 2006

Nanocomposites of polyurethane were prepared from inorganic nano particles, $Na^+-montmorillonite$ (MMT), silica, $CaCO_3$, and surface modified MMT and their properties were investigated. It was shown that the molecular weight and polydispenity of nanocomposites of polyurethane were 20000 to 28000 and 1.0 to 2.0, respectively. d-Spacing for nanocomposites of MMT were increased than that of pure MMT. Initial degradation temperature of nanocomposites were 250 to $280^{\circ}C$. And also, the range of weight loss for nanocomposites were decreased and the end of thermal degradation was observed at higher temperatures about $50^{\circ}C$. The elongation at break for $CaCO_3$ filled nanocomposites were the highest among the nanocomposites used in this study. studied. It was found that the tensile strength increased with increasing the filler contents while the silica nanocomposite exhibited the lowest increase and the $CaCO_3$ nanocomposite the highest.

• Journal of the Korea Institute of Building Construction
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• v.19 no.4
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• pp.289-297
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• 2019

Epoxy resin adhesives are currently used as adhesives in buildings. Epoxy resin adhesives, which are organic materials, generate harmful substances when producing adhesives, and toxic substances are high in the residential space after installation. In addition, a large amount of carbon monoxide generated from organic materials in the case of a building fire leads to personal injury. This study evaluates the feasibility of inorganic adhesives using pure inorganic materials such as magnesia, phosphate, and borax as inorganic adhesives to replace existing organic adhesives. As a result of the experiment on the selection of adequate phosphate and the characteristics of the addition rate of borax used as a retarder, the potassium phosphate monobasic was obtained as a suitable phosphate and the characteristics according to the borax addition rate were compared with the quality standard of KS F 4923 The hardening shrinkage and heat change rate satisfied the quality standards. The tensile strength was satisfactory when the borax addition rate was 4% or more, but the adhesive strength did not meet the quality standards. Further studies are needed to improve adhesion strength.

• Journal of the Korean Recycled Construction Resources Institute
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• v.11 no.3
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• pp.234-243
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• 2023

The electromagnetic pulse(EMP) is a general term for high-output electromagnetic waves, and is classified into EMP generated from nuclear weapons, non-nuclear EMP, and EMP generated by natural phenomena. Electromagnetic pulses are means that can cause fatal damage to all electronic devices with electromagnetic elements, such as communication devices, mobile phones, computers, TVs, and means of transportation. In this study, the electromagnetic pulse(EMP) shielding effectiveness evaluation of paints according to the type and amount of carbon material was conducted to develop EMP shielding inorganic paint using carbon materials. In order to analyze the improvement of compatibility and dispersibility between materials, experiments were conducted two times with about 27 types of mixture proportions, and the electromagnetic pulse shielding effectiveness was evaluated by the electrical resistance measurement method. As a result of applying the EMP shielding paint developed through this study to shielding concrete, it was confirmed that the shielding performance was improved from about 25 dB to a maximum of 40 dB.