• 한국세라믹학회지
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• 제46권6호
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• pp.609-614
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• 2009

The low-temperature preparation of porous ceramics was carried out using mixtures of alumina-zinc borosilicate (ZBS) glass. The compositions of alumina-ZBS glass mixture with PMMA pore-former were unfortunately densified. Because PMMA was evaporated below the softening point of ZBS glass ($588{^{\circ}C}$), the densification through the pore-filling caused by the capillary force might occur. Howerver, those with carbon possessed pores where carbon was evaporated above the softening point. The porous ceramic having 35% porosity was successively fabricated by the low-temperature sintering process below $900{^{\circ}C}$ using 45 vol% of alumina, 45 vol% ZBS of glass, and 10 vol% of carbon as starting materials.

• 한국세라믹학회지
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• 제29권12호
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• pp.956-962
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• 1992

The predominant sintering mechanisms of low firing temperature ceramic substrate which consists of borosilicate glass containing alumina as a filler are the rearrangement of alumina particles and the viscous flow of glass powders. In this system, sintering condition depends on the volume ratio of alumina to glass and on the particle size. When the substrate contains about 35 vol% alumina filler and the average alumina particle size is 4 $\mu\textrm{m}$, the best firing condition is obtained at the temperature range of 900∼1000$^{\circ}C$. The extensive rearrangement behavior occurs at these conditions, and the optimum sintering condition is attained by smaller size of glass particles, too. The formation of cristobalite during sintering causes the difference of thermal expansion coefficient between the substrate and Si chip. This phenomenon degradates the capacity of Si chip. Therefore, the crystallization should be prevented. In the alumina filled borosilicate glass system, the crystallization does not occur. This effect may have some relation with aluminum ions in alumina. For aluminum ions diffuse into glass matrix during sintering, functiong as network former.

• 한국세라믹학회지
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• 제26권4호
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• pp.521-531
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• 1989

The dependence of the chemical durability of simulated waste glasses containing the simplified waste similar to the SRP waste on compositions of host glasses, amounts of waste loading, and kinds of leachants has been investigated as a basic study on the waste immobilization through vitrification. The maximum limit of the amount of waste loading for glassforming with the host sodium borosilicate glasses selected in this study was 50wt%. The chemical durability of waste glasses whose host glass belonged to the immiscible composition region was much higher than that of waste glasses whose host glass belonged to the miscible composition region. The former waste glass showed lower chemical durability in deionized and silicate waters than in brine, while the latter glass showed the lowest chemical durability in deionized and silicate waters than in brine, while the latter glass showed the lowest chemical durability in silicate water. It was also observed that the total leaching rates in brine were noticeably small in comparison with those in other solutions. The composition of the host borosilicate glass which was suitable for the treatment of the waste through vitrification was found to be 25 Na2O-5B2O3-70SiO2(wt.%).

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 하계학술대회 논문집
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• pp.1018-1021
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• 2001

1018-1021 The CuO-P$_2$O$_{5}$ containing P$_2$O$_{5}$ as glass-former were prepared by press-quenching method on the copper plate. By post-heat treatment of these glasses, the CuO-P$_2$O$_{5}$ -V$_2$O$_{5}$ -g1ass ceramics was obtained and the crystallization behavior and dc conductivities were investigovted. The heat-treated glass-ceramics decreased in electrical conductivity by the order of 10$^1$ compared to amorphous glass. The linear relationship between In($\sigma$T) and T$^{-1}$ indicated that electrical conduction in CuO-P$_2$O$_{5}$ -V$_2$O$_{5}$ -gass occurred by a small polaron hopping.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 추계학술대회 논문집 Vol.14 No.1
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• pp.550-553
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• 2001

$Li_{2}O-P_{2}O_{5}-Bi_{2}O_{3}-V_{2}O_{5}$ glass containing glass former, $P_{2}O_{5}$ and $Bi_{2}O_{3}$ was prepard by melting the glass batch in pt. erucible followed by guenching on the copper plate. We found that $Li_{2}O-P_{2}O_{5}-Bi_{2}O_{3}-V_{2}O_{5}$ glass-ceramics obtained from the crystallization of glass showed signifieantly higher capacity and longer cycle life tham $LiV_{3}O_{8}$ made from powder synthesis. In this paper, we described crystallization process and $LiV_{3}O_{8}$ crystal growth in glass matrix by increasing temperature. The electrochemical properties were strongly affected by $LiV_{3}O_{8}$ crystal growth in matrix

• 한국전기전자재료학회논문지
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• 제14권8호
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• pp.652-657
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• 2001

Vanadate glasses containing 10~20mol% glass former, P$_2$O$_{5}$ were prepared by melting the batch in platinum crucible and quenching on the copper plate. Li$_2$O-P$_2$O$_{5}$-V$_2$O$_{5}$ glass-ceramics having LiV$_3$O$_{8}$ were obtained by heat-treatment of this glass in crystallization temperature. The glass-ceramics showed singnificantly good capacity and long cycles life according to heating condition. In this paper, we described electrochemical properties during crystallization process and found the best crystallizaton condition of Li$_2$O-P$_2$O$_{5}$-V$_2$O$_{5}$ glass as cathode material. Li$_2$O-P$_2$O$_{5}$-V$_2$O$_{5}$ glass-ceramics heat-treated at 233$^{\circ}C$ for 3 hors showed good rechargeable capacity of 220mAh/g in the cycling range between 2.0 and 3.9V.en 2.0 and 3.9V.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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• pp.1095-1098
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• 2004

In this study, $Bi_2O_3-B_2O_3-ZnO$ glass system, which was expected to have similar properties with PbO containing glass system, was selected as a PbO replaceable potential composition because the atomic weight and ionic radius of Bi is similar to those of Pb. Glasses with different modifier/former ratio were prepared by melting the raw ingredient mixtures in $Bi_2O_3-B_2O_3-ZnO$ system, and the thermal and electrical properties of the sintered samples were examined. The glass transition temperatures and the dielectric constant of the glass pellets were between 350 $^{\circ}C{\sim}$500 $^{\circ}C$ and 15-35, respectively.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 추계학술대회 논문집
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• pp.550-553
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• 2001

Li$_2$O-P$_2$O$_{5}$-Bi$_2$O$_3$-V$_2$O$_{5}$ glass containing glass former, P$_2$O$_{5}$ and Bi$_2$O$_3$ was prepard by melting the glass batch in pt. erucible followed by quenching on the copper plate. We found that Li$_2$O-P$_2$O$_{5}$-Bi$_2$O$_3$-V$_2$O$_{5}$ g1ass-ceramics obtained from the crystallization of glass showed significantly higher capacity and longer cycle life tham LiV$_3$O$_{8}$ made from powder synthesis. In this paper, we described crystallization process and LiV$_3$O$_{8}$ crystal growth in glass matrix by increasing temperature. The electrochemical properties were strongly affected by LiV$_3$O$_{8}$ crystal growth in matrix.rowth in matrix.

• 한국세라믹학회지
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• 제41권11호
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• pp.851-857
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• 2004

전기로 제강분진(EAF dust)이 첨가된 규산염 유리, 붕규산염 유리 그리고 납규산염 유리 내의 중금속 안정화 특성을 독성용출 시험법(TCLP)으로 조사하였다. 또한 XRD와 FT-IR 방법을 통하여 EAF dust 첨가량에 따른 유리의 구조변화가 TCLP 결과에 미치는 영향을 고찰하였다. 모유리에 EAE dust를 30 wt%까지 첨가하여도 규산염 유리, 붕규산염 유리, 납규산염 유리 계열의 시편 모두 결정화가 발생되지 않고 비정질을 나타내었다. TCLP법에 의한 유리시편의 중금속 용출량은 EAF dust의 첨가량과 함께 증가되었다. 중금속 용출이 가장 적은 시편은 규산염 유리 계열이었으며 납규산염 유리 계열의 시편은 붕규산염 유리 계열에 비해 중금속 용출량이 상대적으로 적었다. 단, 납규산염 유리 계열 모유리 조성에 포함되어 있는 납의 영향으로 Pb용출은 납규산염 유리 계열시편에서 가장 많았다. Oxygen/network former ratio 값을 이용하여 같은 계열 시편 간의 화학적 내구성을 비교할 수 있었으나 다른 계열 시편 간에는 적절치 않았다. EAF dust가 첨가되면 규산염 유리 계열의 시편에서는 유리구조 내 Si-O-Si 대칭성이 감소되고 비가교 산소가 증가되어 유리의 구조를 약화시키고 화학적 내구성을 감소시켰다 붕규산염 유리 계열 시편에서 EAF dust가 첨가되면 tetraborate group이 diborate group으로 변화되고 2차원 층상구조인 pyre-와 ortho-borate도 형성되어 결국 구조약화를 가져왔다. 3가지 계열의 유리조성 중에서 EAF dust내의 중금속들을 안정화하는데 가장 적합한 것은 규산염 유리 계열의 시편으로 판단되었다.

• 한국실내디자인학회논문집
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• 제17호
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• pp.120-127
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• 1998

Because of the advancements of these modern tecniques and new materials being developed expressionally diverse methods of utilizing metal and glass are being discovered. modern architects in order to add an open-hearted and homogeneous concept into their endeavors to create a transparent space are inclining to the many expressive characteristics which glass and metal provide. Furthermore the products of these endeavors are bringing forth various key elements in respect to useage for today's interior spaces, Due to differing methods of setting up the interior sphere is fastly becoming more generous than viewpoints of the past. Through the use of organization moreover from the former geometric school of thought curvilinear and active organization/ expressive inclinations are becoming diversified. Thus in accordance with the diversifying methods of fixing glass for a sleek and reflective exterior and due to the influence of durability to these fixtures precision not just decoration is gradually becoming more in demand/ Hereupon this study enlightens from the standpoint of planninf for interior spaces through the utilization of glass and metal upon the key factors of expressive attributes and the possibilities which thusly arise. The purpose of this study is to apply these theories to an actual case model study and verify their validity.