권호 표지

한국세라믹학회지 (Journal of the Korean Ceramic Society) (Journal of the Korean Ceramic Society)

한국세라믹학회 (The Korean Ceramic Society)

  • 격월간
  • /
  • 1229-7801(pISSN)
  • /
  • 2234-0491(eISSN)

과학기술표준분류

  • 재료 ＞ 세라믹재료
  • 재료 ＞ 분석/물성평가기술

Aim & Scope

The Journal of Korean Ceramic Society publishes the original and significant results of experimental and theoretical research relating to all categories of ceramics including composites and hybrids. The journal aims at providing an international forum for fundamental understanding and applied knowledge of the relationship between processing, microstructure and properties of ceramics. The scope of the journal includes basic science and classical ceramics, engineering ceramics, electronic and energy ceramics, noncrystalline ceramics, ceramics related to nanoscience, bioceramics, and emerging fields of ceramics. The Journal of Korean Ceramic Society is a peer-reviewed international journal. It features three types of submissions: Full Length Paper, Review Paper, and Communications which contain reports of original research and reviews on all aspects of ceramics and ceramics-based composites ranging from fundamentals to application.

http://211.116.129.33/home/kor/article/submission/submission_login_form.asp?globalmenu=3&localmenu=0 KSCI KCI SCOPUS

제56권6호

  1. Hwang, Sungu;Lim, Jinhyuck;Ryu, Suchak 521
    https://doi.org/10.4191/kcers.2019.56.6.02 PDF KSCI
    A study was conducted to investigate the possibility of a composite material containing a composite resin as a matrix and hydroxyapatite (HAp) powder as a substitute material for tooth repair. As the content of HAp increased, hardness value (111.9 HV at 9%) increased and flexural strength (73.3 MPa at 9%) decreased. Observation of the microstructure after immersion in a simulated body fluid (SBF) solution confirmed a dense structure due to mutual coagulation and curing. It was thought that fine HAp recrystals were formed with the lapse of time, and they were entangled to form a condensation structure and had a dense structure. In addition, since the activity was shown by the ion migration on the surface of a tooth, it was highly likely that a biocompatible bond occurred during tooth contact. Therefore, it could be used as a substitute material for tooth repair.
  2. Ohsato, Hitoshi;Varghese, Jobin;Vahera, Timo;Kim, Jeong Seog;Sebastian, Mailadil T.;Jantunen, Heli;Iwata, Makoto 526
    https://doi.org/10.4191/kcers.2019.56.6.01 PDF KSCI
    Indialite/cordierite glass-ceramics demonstrate excellent microwave dielectric properties such as a low dielectric constant of 4.7 and an extremely high quality factor Qf of more than 200 × 103 GHz when crystallized at 1300℃/20 h, which are essential criteria for application to 5G/6G mobile communication systems. The glass-ceramics applied to dielectric resonators, low-temperature co-fired ceramic (LTCC) substrates, and direct casting glass substrates are reviewed in this paper. The glass-ceramics are fabricated by the crystallization of glass with cordierite composition melted at 1550℃. The dielectric resonators are composed of crystallized glass pellets made from glass rods cast in a graphite mold. The LTCC substrates are made from indialite glass-ceramic powder crystallized at a low temperature of 1000℃/1 h, and the direct casting glass-ceramic substrates are composed of crystallized glass plates cast on a graphite plate. All these materials exhibit excellent microwave dielectric properties.
  3. Lee, Woong-Geol;Jeon, Se-Hoon;Song, Myong-Shin;Kim, Jusung 534
    https://doi.org/10.4191/kcers.2019.56.6.04 PDF KSCI
    Carbon dioxide emissions involved in global warming are one of the most important issues in the world, and carbon dioxide emissions from the cement industry are about 7% of total carbon dioxide emissions. Thus, reduction in the amount of utilized cement can contribute to a reduction of carbon dioxide emissions. The average life of concrete is 20 ~ 30 years, and if concrete life can be improved by ten years, cement use will be much lower. In this study, we examined the use and effect of fructan from microbes as a method for the densification of the pore structure of cement. The effect of fructan on the hydration reaction and pore distribution, as well as the water absorption of hardened cement mortar were studied. Pores distribution increased in mesopore OPC, and absorption rate was found to decrease with the use of fructan, which has a glue-like and swelling character.
  4. Kwon, Guk-hyun;Kim, Tae Woo;Lee, Hae In;Cho, Won Chul;Kim, Heeyeon 541
    https://doi.org/10.4191/kcers.2019.56.6.06 PDF KSCI
    Zirconia (ZrO2) materials are widely used in a variety of energy systems and devices. When nanorod-shaped ZrO2 is used as energy materials, ionic conductivity and mechanical strength can be improved compared to the characteristics of conventional spherical-shaped nanomaterials. In this study, we synthesized ZrO2 nanorods and investigated the shape change of them depending on various synthesis conditions such as precursor concentration, synthesis temperature, synthesis period, and aging period. The obtained nanorods were casted into a membrane for alkaline water electrolysis system and subjected to basic performance evaluation for use as a separator. The structure and the shape of the nanorods were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and the like.
  5. Kang, Woo-Seok;Hong, Chang-Hyo;Lee, Young-Jin;Choi, Gangho;Shin, Dong-Jin;Lim, Dong-Hwan;Jeong, Soon-Jong;Jo, Wook 549
    https://doi.org/10.4191/kcers.2019.56.6.03 PDF KSCI
    More than two decades of world-wide research efforts have resulted in several classes of potentially important materials. Among them are incipient piezoelectrics, which are especially useful for actuator applications. However, relatively large electric fields are required for activating the large incipient electromechanical strains. So far, many attempts have been made to reduce the required electric field by intentionally inhomogenizing the electric field distribution in the microstructure through core-shell and composite approaches. Here, we show that electric field concentration can be realized simply by adjusting electrode patterns. We have investigated the effect of electrode patterning on the incipient electromechanical strain properties of an exemplarily chosen lead-free relaxor system, revealing that electrode patterning does have a significant role on the strain properties of the given lead-free relaxor system. We believe that this approach would make a new strategy for ones to consider bringing the functional properties of electroceramics beyond their conventional limit.
  6. Cao, Jing-Yu;Li, Jin-Peng;Jiang, Ya-Mei;Wang, Su-Lei;Ding, Yi;Oh, Won-Chun 558
    https://doi.org/10.4191/kcers.2019.56.6.10 PDF KSCI
    In this study, dimethyl silicone oil and liquid paraffin were combined and subsequently emulsified; the resulting mixture was innovatively incorporated into desulfurized gypsum to resolve its drawback of a poor water resistance. The waterproof mechanism of the composite emulsion and liquid paraffin emulsion with mass fractions of 1%, 2%, 3%, and 4% were investigated. The effect of the desulfurized gypsum on the waterproof performance and basic mechanical properties were also investigated. The configuration of the composite waterproofing agent was characterized by FTIR and 1HNMR. The results showed that, compared with the traditional liquid paraffin emulsion-based waterproofing agent, the softening coefficient of the silicone oil paraffin composite emulsion-based water-repellent agent was increased by 60% and attained a value of 0.89. Combined with the waterproof mechanism and microscope morphology analysis of gypsum hydration products, the improvement in the water resistance of water resistance was primarily attributed to the formation of a silicone hydrophobic membrane between the crystals of the gypsum block; this ensured that water could not penetrate the crystal.
  7. Kim, Jong-Young;Hwang, Kwang-Taek 566
    https://doi.org/10.4191/kcers.2019.56.6.05 PDF KSCI
    In this work, we investigated kaolinite raw materials from China, Vietnam, and Seongju (Korea) used for the manufacture of porcelain products in Korea. According to chemical analysis results, for the kaolinites from Seongju, more feldspar components containing CaO, K2O, and Na2O are found than in those from China or Vietnam, of which the composition is close to that of pure kaolinite. Through X-ray Rietveld quantitative analysis, kaolinite and muscovite are found to be the main phases for all the raw materials. Halloysite, quartz, gibbsite, and andesine are found at more than 5% for KM-85 (China), LKC-60 (Vietnam), KC-009 (China), and WA (Seongju). Absorption rate is on order of LKC-60 < KC-009 < KM-85 < PA < WA, and the sample, sintered in reductive atmosphere, exhibits the lowest absorption rate. Comparing the color of the sintered samples, kaolinites of KM-85, LKC-60, and KC-009 (L*: 94 - 97%) show higher whiteness value than those of WA and PA (L*: 82 - 91%).
  8. Lee, Suyeon;Kim, Woo Sik 577
    https://doi.org/10.4191/kcers.2019.56.6.09 PDF KSCI
    Recently, E-glass fiber is the one of most widely used ceramic fiber for aerospace fields. Recycling technology for waste of wind power blades is arising issue for reasons of low manageability and high cost of wastes. Though glass fiber is perfectly dissolved in hydrofluoric acid, low cost for recycling and harmless to human is important for recycling of blades. Chemically melted glass fiber will be used as different purpose like accelerator of hardening for shotcrete. In this study, dissolution process of glass fiber is tested in NaOH solution at low temperatures. In addition, difference in diameter reduction of glass fiber is observed by various alkali concentration and reaction times, treatment temperatures using FE-SEM.
  9. Joo, Young Jun;Cho, Kwang Youn 583
    https://doi.org/10.4191/kcers.2019.56.6.08 PDF KSCI
    Silicon carbide (SiC) fiber mats generate large amounts of heat through microwave interactions and are used as heating elements in rapid heat treatment furnaces. However, SiC fibers cool immediately when the microwave power is turned off. Therefore, ceramic layers are inserted between the SiC fiber layers to improve the heat conservation performance of SiC fiber mats. In this study, we fabricated SiC fiber mat composites (SMCs) with ceramic layers under various pressures. The SMC fabricated under 0.007 kPa showed the lowest heat-generating temperature and deviation because less necking was observed between the materials. On the other hand, the SMC fabricated under 0.375 kPa showed the highest heat-generating temperature of 1532.33℃. The SMCs prepared in this study using ceramic powder not only showed heat-generating temperatures comparable to those of conventional SiC fiber mats but also exhibited excellent heat-preserving ability.
  10. Ha, Minh-Tan;Shin, Yun-Ji;Bae, Si-Young;Park, Sun-Young;Jeong, Seong-Min 589
    https://doi.org/10.4191/kcers.2019.56.6.07 PDF KSCI
    The top-seeded solution growth (TSSG) method is an effective approach for the growth of high-quality SiC single crystals. In this method, the temperature gradient in the melt is the key factor determining the crystal growth rate and crystal quality. In this study, the effects of the aperture at the top of the hot-zone on the growth of the SiC single crystal obtained using the TSSG method were evaluated using multiphysics simulations. The temperature distribution and C concentration profile in the Si melt were taken into consideration. The simulation results showed that the adjustment of the aperture at the top of the hot-zone and the temperature gradient in the melt could be finely controlled. The surface morphology, crystal quality, and polytype stability of the grown SiC crystals were investigated using optical microscopy, high-resolution X-ray diffraction, and micro-Raman spectroscopy, respectively. The simulation and experimental results suggested that a small temperature gradient at the crystal-melt interface is suitable for growing high-quality SiC single crystals via the TSSG method.
  11. Park, Youngho;Hyun, Sangil;Hong, Youn-Woo 596
    https://doi.org/10.4191/kcers.2019.56.6.12 PDF KSCI
    Artificial intelligence with a sufficient amount of realistic big data in certain applications has been demonstrated to play an important role in designing new materials or in manufacturing high-quality products. To reduce cracks in ceramic products using machine learning, it is desirable to utilize big data in recently developed data-driven optimization schemes. However, there is insufficient big data for ceramic processes. Therefore, we developed a numerical algorithm to make "virtual" manufacturing data sets using indirect methods such as computer simulations and image processing. In this study, a numerical algorithm based on the random walk was demonstrated to generate images of cracks by adjusting the conditions of the random walk process such as the number of steps, changes in direction, and the number of cracks.
  12. Seong, Dong Min;Lee, Hyesun;Chang, Jeong Ho 601
    https://doi.org/10.4191/kcers.2019.56.6.11 PDF KSCI
    This work reports the preparation of ceramic hybrid films with illite-polyethylene composites analyzed as a function of concentration of added illite in polyethylene. The enhancement of oxygen and water-vapor transmission rate of illite-polyethylene film was evaluated to determine its influence on the freshness in fruit packaging. Particle size of illite materials was controlled in the range of 1~10 ㎛ and then mixed with LDPE to form the masterbatch. Ceramic hybrid films were prepared through a blown film making process. To determine the dispersity and abundancy of illite materials in the polyethylene matrix, various characterizations of illite-PE hybrid masterbatch and films were performed using SEM, TGA, and FT-IR. The oxygen and water-vapor transmission rate of illite-polyethylene film was found to be two times higher than that of LDPE film.