• 한국자기학회지
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• 제24권3호
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• pp.86-89
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• 2014

이방성 희토류 본드자석은 자성분말과 유기 바인더로 구성되며 본드자석 내에서 유기 바인더는 분말의 배향을 유리하게 하는 역할을 한다. 유기 바인더는 고분자 수지, 활제, 경화제, 커플링제 등으로 구성되며 자성분말에 적합한 유기 바인더를 제조하기 위해 본 연구에서는 다양한 성분을 선정하여 유기 바인더를 제조하였고 구성비 및 첨가량을 조절하여 이를 본드자석에 적용하였다. 특성평가를 통해 자기특성 및 기계적 특성을 측정하였고 이로부터 본드자석에 적합한 유기 바인더의 성분 및 비율을 확인하였다.

• 한국산학기술학회논문지
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• 제6권4호
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• pp.337-341
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• 2005

본 연구에서는 광촉매 $TiO_2/P-25$를 POF에 코팅하여 IPA 분해 활성을 고찰한 결과, 코팅 시 용매의 조건은 에탄올에서 IPA의 분해효율이 가장 우수하였고 무기바인더(KR-400), 유기바인더(A-9540) 및 무$\cdot$유기 복합바인더(GPTMS, TMOS)중에서 유기 바인더인 A-9540을 사용했을 때 효율이 가장 우수한 것으로 나왔다. 유기 바인더는 광 분해반응에 의하여 바인더 자체가 분해되고 무기 바인더는 부착성이 떨어졌다. 유$\cdot$무기 복합 바인더 중에서 광분해 효율이 뛰어난 TMOS를 바인더로 선정하여 TMOS/P-25의 비율을 0.05부터 1로 바꾸어 광분해 실험을 수행한 결과, 바인더로써 TMOS의 첨가는 IPA분해 효율을 낮게 하였다.

• 폴리머
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• 제34권2호
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• pp.89-96
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• 2010

Methyl methacrylate(MMA), ethyl acrylate(EA), n-butyl acrylate(BA), styrene(St) 단량체를 수용성 개시제인 ammonium persulfate(APS)와 음이온 유화제인 sodium dodecyl benzene sulfonate(SDBS)를 사용하여 organic/organic core-shell 구조의 접착바인더를 중합 후 부직포와 피혁에 함침시키고 플라즈마 표면 처리 후 속도론적인 해석과 기계적인 물성을 평가하였다. Core-shell 바인더 중합시 전환율은 단량체의 조성이 등몰에서 MMA/EA, MMA/BA core-shell 복합입자 모두 90% 이상이 되었다. 등몰에서 부직포/부직포에 core-shell 복합입자를 함침시키고 플라즈마 처리 후의 상태접착 박리강도는 MMA/St, EA/BA, BA/MMA, EA/St, EA/MMA의 순으로 되었고, 또한 부직포/피혁에 core-shell 복합입자를 함침시키고 플라즈마 처리 후의 상태접착 박리강도는 MMA/BA, BA/EA, MMA/EA, St/MMA, EA/St의 순으로 되었다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2002년도 춘계학술대회 논문집 유기절연재료 전자세라믹 방전플라즈마 일렉트렛트 및 응용기술
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• pp.103-107
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• 2002

Ethyl silicate was used as organic binder for alumina refractories. In the present work only 15% of the water required for complete hydrolysis of ethyl silicate was initially added. The balance was provided from the atmosphere under controlled conditions of temperature and rh. The purpose of detailing the possible binder problem areas is more to indicate that the binder can have an effect on ceramic operations.

• 한국세라믹학회지
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• 제41권9호
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• pp.647-652
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• 2004

In aqueous tape casting of alumina slurry systems, the relationships between the suspension compositions and the defects of the dried tapes were discussed. The suspensions compositions were controlled with the ratios of the solids, water and organics binder contents. The effects of the thickness of dried tape and kinds of binder system were also examined. In the defect free region, the apparent viscosity showed nearly same value due to the count balancing effect of solid and organic binder content on the apparent viscosity. When water content was constant, increasing solid led to decrease of organic binder content. The defect free region was narrowed with increasing of casting thickness. When linear type acrylic emulsion binders system (D1000 and D 1035) were used, defect free zone formed the belt type in the triangle of solid, water and organic binder content according to the line of constant water contents. However the defect free region was not found in the cross-link type emulsion binder system (D 1050).

• 한국세라믹학회지
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• 제32권8호
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• pp.901-908
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• 1995

In aqueous slurry processing of silicon nitride, the interaction of dispersant and binder used as polymeric processing additives on the silicon nitride particle surface was studied to identify the effect of these processing polymeric additives on the ceramic powder processing. The adsoprtion isotherm study of anionic organic molecule as dispersant and nonionic organic molecules as binder of silicon nitricde was studied to investigate the effect of these processing organic additives on the physicochemical properties of silicon nitride particles. As anionic molecule adsorbed onto silicon nitrice surface, the IEP of silicon nitride shifted toward acidic pH and changed the stability of silicon nitride particle. However, the adsorption of binder as nonionic organic molecule onto silicon nitride surface did not changed the IEP but caused the decrease of electrostatic potentials of silicon nitride. These distinctive adsorption behaviors of organic additives on silicon nitride particles can be closely correlated to the stability of silicon nitride particles suspended in aqueous media.

• The Korean Journal of Ceramics
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• 제4권4호
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• pp.292-296
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• 1998

In wet powder processing of alumina, a number of organic molecules such as dispersant and binder are used to produce the flow behavior and properties requisite for shape forming. In this study, interparticle forces of alumina particles suspended in aqueous media were controlled by suspension pH, poly (methacrylic acid) (PMAA, used as dispersant) and poly (vinyl alcohol) (PVA, used as binder). The combined adsorption isotherms of the dispersant and binder additives on alumina were determined by total organic carbon analyzer, while the adsorption of dispersant was differentiated from binder in the mixed additive system by ultraviolet spectroscopy. The electrokinetic behavior of alumina suspensions were then correlated with the adsorption characteristics of dispersant and binder onto alumina particles. It was found that the isoelectric ($pH_{iep}$) of alumina shifted from pH 8.9${\pm}$0.1 to acidic pH as PMAA concentration increased, while PVA adsorption did not affect the $pH_{iep}$ but caused a decrease in the near surface potential.

• 한국전기전자재료학회논문지
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• 제15권11호
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• pp.976-980
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• 2002

This paper repors on low temperature sealing process of PDP using binder and capping glass. The exhausting hole on rear glass of PDP was sealed by capping glass using screen-printed binder without exhausting glass tube. Based on the tubeless packaging process, out gassing problem could be reduced and vacuum conductance could be improved by eliminating exhaust tube.

• 폴리머
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• 제32권5호
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• pp.470-477
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• 2008

아크릴계 단량체인 MMA, St, EA, BA 및 관능성 단량체인 2-HEMA 단량체를 수용성 개시제인 APS와 음이온 유화제인 SDBS를 사용하여 한 입자 내에 서로 다른 물성을 나타내는 core shell 구조의 바인더를 중합 후 부직포에 처리하여 기계적 물성을 평가하였다. Core shell 바인더 중합시 단량체 조성에 관계없이 개시제는 1.0 wt%/단량체의 농도를 가지는 APS와 0.04 wt%/단량체의 유화제를 사용했을 때 가장 높은 전환율을 나타내었고, core shell 바인더의 유리전이온도는 공중합체의 단일 전위 곡선에 비하여 core shell 바인더는 2개 이상의 전이곡선을 얻었다. 부직포에 core shell 바인더를 처리 후 인장강도 및 신장율 측정에서 관능성 단량체를 사용한 PSt/PMMA/2-HEMA core shell 바인더가 $10.75\;kg_f$/2.5 cm로 가장 높은 값을 나타내었고, 신장율 측정에는 PEA/PBA core shell 바인더가 120.00%로 가장 높은 값을 나타내었다. 결론적으로 core shell 바인더를 사용하여 부직포의 기계적 물성을 조절할 수 있었다.

• 한국분말재료학회지
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• 제12권4호
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• pp.261-265
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• 2005

In order to fabricate complex-shaped polycrystalline ceramics by sintering, organic binders are usually pre-mixed with ceramic powders to enhance the formability during the shape forming process. These organic binders, however, must be eliminated before sintering so as to eliminate the possibilities of poor densification and unusual grain growth during sintering. The present work studies the effect of binder addition on grain growth behavior during sintering of $92(70Pb(Mg_{1/3}Nb_{2/3})O_3-30PbTiO_3))$-8PbO(mol%) piezoelectric ceramics. The microstructures of the sintered samples were examined for various heating profiles and debinding schedules of the binder removal process. Addition of Polyvinyl butyral(PVB) binder promoted abnormal grain growth especially in incompletely debinded regions. Residual carbon appears to change the grain shape from comer-rounded to faceted and enhance abnormal grain growth.