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1 Jurnal f the Krean Ceramic Sciety Vl., N. 1, pp. 53~57, Effect f MgB Additin n Synthesis f Hexagnal Brn Nitride Dae-Jin Lee*, **, Mi-Jung Jee*, Byung-Hyun Chi*, Mi-Jai Lee*, Nam-Hee Ch**, and Mi-Sun Cha*** *Electrnic Materials Labratry, Krea Institute f Ceramic Engineering & Technlgy, Seul , Krea **Schl f Materials Science and Engineering, Inha University, Inchn , Krea ***Large Industry, Daegu , Krea (Received Octber 28, 2008; Accepted December 5, 2008) Hexagnal Brn Nitride w MgB ƒ z *, **Á *Á x* Á *Á û **Á *** *» q ** w w œw *** ( ; ) ABSTRACT The h-bn pwder was synthesized by amrphus B 2 O 3 and activated carbn at 1550 C in nitrgen atmsphere, whse prperties were examined accrding t MgB additin. Amunt f MgB additin was varied in the range f 0 ~10 wt% f the initial mixture. It was bserved that MgB additin led t an increase in the amunt and the grain size f h-bn and decrease in the amunt f B C frming. When MgB added 5 wt%, the amunt and crystallinity f h-bn increased as the hlding time at the synthesis temperature was prlnged. It was als cnfirmed that the regularity f three-dimensinal rdering f h-bn increases. Key wrds : Hexagnal brn nitride, Rhmbhedral brn nitride, MgB, B C, Grain size 1. White graphite Hexagnal brn nitride( w h-bn) graphite q x š. w w, x p» w h-bn y wš, e w j,,» w p y t,, y w y š. w v p yww q jš, ƒ j p w j. 1) Hasan Erdem Çamurlu šw h-bn w, B 2 O 3, C, N w carbthermic B 2 O 3 (l) +3C(s)+N 2 (g) f w BN w š šw ù N 2 gas w gas y Bƒ C w B Cƒ ùkù» h-bn x wš, w x B C h-bn y j k š šw. 2-) Crrespnding authr : Byung-Hyun Chi bhchi@kicet.re.kr Tel : Fax : B C h-bn w ƒ Ca yw, Li yw šw. Ca Li h-bn w 2,5) w B C x wš N 2 CO w h-bn ƒ jù Ca j» ƒ š 1µm w w w. 2) w Li ƒ brn nitride w 1300 C 1100 C¾ û š, hexagnal ³e w ù h-bn j» 1µm w. 5) 1µm w j» h-bn y j w. j» ƒ 5~10µm j y t, q c-bn w j» j»ƒ j h-bn w w v ƒ. Mgƒ y p w h-bn j» g MgB ƒw h-bn w e w w. amrphus B 2 O 3 activated C y w w MgB ƒ, MgB ƒw w h-bn, j» y w w w. 53
2 5 Á Á xá Á û Á Fig. 1. Methd f analysis fr determinatin f the quantities f the cnstituent f the reactin prducts. 2. x h-bn w w amrphus B 2 O 3 activated carbn 1: 3 wš, MgB ƒ ƒ 0, 5, 10 wt% ƒw z yww. yw k ƒ š N 2»w 1550 C 1~10 w w. w z w š š y wš Fig. 1 œ HCl:H 2 O 1:1( v ) yww 90 C 1 leaching ww z filtering w. w filtering B Cù C w» w air» 700 C 1 zy w. B C B 2 O 3 y û wš leaching ww. w BN sƒ XRD (D/max 2200V/PC, Rigaku, Japan), XRF (ZSX primus, Rigaku, Japan), j» x SEM (JSM-380, JEOL, Japan) w. 3. š Fig. 2 carbthermic w w w X- z ww z pattern ùkü. ƒƒ w MgB ƒ ƒ B C peakƒ w ùkû ù, MgB 5wt% 10 wt% ƒw B C peak ùkù ù MgB 10 wt% ƒw Mgyw peakƒ. yw yww Brn w» sx k h-bn w B C w brn w Fig. 2. X-ray diffractin patterns f the prducts (a) after synthesis fr 10 h at 1550 C and (b) after leaching. w wz
3 Hexagnal Brn Nitride의 합성에 있어서 MgB 첨가의 효과 55 B C의 합성을 제한하게 된다. 합성 시 촉매제로 사용된 Mg는 산화환원 반응을 통해 고열을 발생하며 Mg 주변에 micrmetric drplet을 형성하여 brn의 melting을 빠르게 이끌어냄으로써 용융된 brn이 쉽게 가스화하여 N gas 와의 반응을 촉진하므로 h-bn 형성에 Mg가 촉매로 작용 하여 B C의 생성을 제어하게 됨을 확인하였다. 불순물 제거의 효과를 확인하기 위하여 XRF를 통하여 Mg의 함량을 조사하였다. 그 결과 Fig. 1의 W1과 W의 결정성분의 강도가 5.7에서 0.09로 크게 감소하였다. 불 순물의 제거를 위해 Fig. 1과 같이 진행한 후 XRD pattern(fig. 2(b))을 확인하였을 때, 시료 BN-0에서 나타났 던 B C는 거의 제거되었고, MgB 를 10 wt% 참가한 경우 Mg화합물이 다량 남아 있었다. 반면 MgB 를 5 wt% 첨가 한 경우 h-bn peak만이 나타났다. Mg의 적당량 첨가는 B C의 형성을 제어해주는 효과가 있으나 과량을 첨가하 게 되면 제 2상이 다시 생성되어 h-bn을 얻기가 어려워 진다. 따라서 촉매제로서 MgB 의 첨가량은 5 wt%일 때 가 적당하였다. MgB 의 첨가에 따른 입자 성장의 효과를 보기 위해 미 세구조를 측정하여 Fig. 3에 나타내었다. Carbthermic법으 로 합성 시 출발물질만으로는 h-bn의 입자크기가 1~2 µm 이상 성장시키는 것이 어렵다는 연구결과가 있었으나, 미세구조로 보아 MgB 를 첨가하지 않은 경우에 비하여 MgB 가 5 wt%, 10 wt%를 첨가한 경우의 입자가 크게 성 장한 것을 확인할 수 있었다. 이는 Mg의 화학적 특성이 2 ) 2) 크게 작용하는 것으로 촉매제 외에 발화제의 역할도 하 며 연소에 의해 Mg가 발생시키는 고열이 주변 반응물을 급속하게 가열시킴으로써 동일한 실험조건하에 MgB 를 첨가하지 않은 시료에 비하여 MgB 의 5 wt%, 10 wt%의 첨가가 고열에 의한 B의 가스화를 촉진시켜 h-bn의 입 자를 성장시키는데 작용하였기 때문이다. BN의 입자크기 는 온도가 높아질수록 B의 가스화 비율이 증가되어 성장 하는 경향을 보이며 Mg의 발화에 의한 고열이 입자 성 장을 촉진한다. Fig. 는 MgB 5 wt%를 첨가한 시료를 1550 C에서 1시 간부터 10시간까지 합성유지시간을 달리하여 합성을 행 한 후 BN 생성량과 불순물 생성량을 산출하여 나타낸 것 이다. 5 wt%의 MgB 가 첨가된 시료를 합성유지시간을 변 화하였을 때 유지시간이 길어짐에 따라 h-bn의 생성량이 증가하는 것을 확인하였으나 시간 이상의 합성은 생성 량에 큰 변화가 없었다. 또한 각각 시료 5 wt%의 MgB 가 첨가된 시료를 1시간, 2시간 3시간 동안 합성을 진행 한 각각의 시료는 반응에 참여하지 못한 C와 B O 의 양 이 많았으며 시료 시간, 10시간 합성한 시료와 비교하여 B C의 양이 다량인 것을 확인할 수 있었다. MgB 를 5 wt% 첨가한 후 10시간 합성한 경우 첨가제를 첨가하지 않은 경우보다 h-bn의 생성량이 20% 정도 증가하였고 Fig. 3. SEM images f the h-bn frmed frm (a) 0, (b) 5, and (c) 10 wt% MgB added mixture at 1550C fr 10 h. 3), 2 3 Fig.. Chang in the amunt f h-bn, B2O3, BC and C in the prducts f the experiments cnducted at 1550C fr 1, 2, 3, and 10 h. 제 권 제 1호(2009)
4 5 Á Á xá Á û Á B C w. B C sx k system h-bn wì w ù d w N 2» w h-bn w y w. ) B C k œ h-bn y» w w BN w w w w w v w. MgB 5wt% ƒw z w w z w X- z wwš Fig. 5 ùkü. h-bn ƒw 2Θ=2 (10) z ql (100), (101) peak, 2Θ=50 w (102) peak ƒ ùkû. 1 w (10) peakƒ 2 rhmbhedral peak 1.5 hexagnal peak š 50 (102) peak x. w rhmbhedral peak w 3 ¾ w ù z ùk ù. w 3 ³e w (102) peak w 2 z l ùkùš ¼ sharpw š ƒw. ABC stack w r-bn ƒ w» w ùkù ƒ w ¼ brn nitrideƒ AB stack w h-bn yw. w x»w w y h-bn ww» w w r-bn x w» h-bn w w w œ w. wr w ¼ Mg yw B C peak y w h- BN w w w r-bn peak û š peak j ƒ w. Fig. 1 œ w w X- z ww Fig. 5(a) w ùkû Mg 2 B 2 O 5 B C peakƒ Fig. 5(b) x ùkù. Fig. 1 œ BN prduct û. Fig. 5 (a) (b)ƒ 5 r-bn peak ƒ w y w BN xk». h-bn 3 ³e üš G.I(Graphitizatin Index) d w Fig. ùkü. ƒw G.I w 3 z l 10 ¾ 3 w û w w ùkþ. Hexagnal ³e m y G.I t w, G.I Area[ ( 100) + ( 101) ] G.I = Area( 102) Fig. 5. X-ray diffractin patterns f the prducts (a) after synthesis at 1550 C fr 1, 2, 3, and 10 h and (b) after leaching that. Fig.. Graphitizatin Index f h-bn synthesized with hlding time. w wz
5 Hexagnal Brn Nitride w MgB ƒ z 57. (101) (102) peak ³e w w hexagnal G.I 1. j ƒ ƒ ùkü. 7) 1 G.I 8. y w w ù küš 10 w w G.I 2.2 w ƒ š 3 ³ e ƒ hexagnal.. h-bn w w» w amrphus B 2 O 3 C MgB ƒw z carbthermic 1500 C 1~10 w w. (1) MgB 5wt% ƒw B C š h-bn j» j ƒ g. 5 wt% MgB ƒw Mg yw. (2) Carbthermic w w HCl H 2 O yw leachingw, w w B 2 O 3 C, w w 2 B C Mgyw g. (3) 5 wt% MgB ƒw 1550 C w 3 w rhmbhedral hexagnal ƒ y BN š, w w hexagnal BN w B C Cƒ. w ¼ 3 ³e ƒw. REFERENCES 1. Kempfer, L., The Many Faces f Brn Nitride, Mater. Eng., 107, 1- (1990). 2. Hasan Erdem Çamurlu, Naci Sevinç, and Yavuz Tpkaya, Effect f Calcium Carbnate Additin n Carbthermic Frmatin f Hexagnal Brn Nitride, J. Eur. Ceram. Sc., 28 [3] (2008). 3. Ayd gdu, A. and Sevinc, N., Carbthermic Frmatin f Brn Nitride, J. Eur. Ceram. Sc., (2003).. Jn, S. J. and Jha, A. A., Vapur-Phase Reductin and the Synthesis f Brn-Based Ceramic Phases, J. Mat. Sci., (1995). 5. T.S. Bartniskaya, A.V. Kurdyumv, V.I. Lyashenk, N.F. Ostrvskaya, and I.G. Rgvaya, Catalytic Synthesis f Graphite-like Brn Nitride, Pwder Metallurgy and Metal Ceramics, 35 [5-] (199).. Hwang, Chyi-Ching and Chung, Shyan-Lung, Cmbustin Synthesis f Brn Nitride Pwder, J. Mater. Res., 13 [3] 80-8 (1998). 7. H. Lrenz and I. Orgzall, Influence f the Initial Crystallinity n the High Pressure-High Temperature Phase Transitin in Brn Nitride, Acta Mater., (200). «1y(2009)
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[ ] œwz, 21«6y(2008) J. of the Korean Society for Heat Treatment, Vol. 21, No. 6, (2008) pp. 300~306 š y w p x*, **Á **Áy y* * ** w œ w œw, w» gœ Solid State Diffusion Brazing of the Aluminum Alloy Castings
69-1(p.1-27).fm
99 A 380 B 787 : wœ z w * w w wœ» A380 B787 wœ» w. wœ» ww r. w wœ» p j y w r» w. I. II. z III. A380 B787 IV. A380 V. wœ» : x VI. z VII. I. A380 B787»ƒ z wœ w, w w p j w w ƒ r. t wœ w ƒ w w wœ» š œm wš,
fm
[ ] w wz DOI: 10.3740/MRSK.2009.19.12.692 Kor. J. Mater. Res. Vol. 19, No. 12 (2009) y INCONEL 718w Gas Tungsten Arc Welding» p sƒ ½»y Á *Á *Á y** ( ) d lj p wœq, *w wœ» q **( ) d lj p t Mechanical Properties
10(3)-10.fm
w y wz 10«3y 259~264 (2010.12.) Journal of Korean Society of Urban Environment w gj p p y Á Á½k * w m œw Á* w y œw (2010 9 28, 2010 10 12 k) Characteristics of Antiwashout Underwater Concrete for Reduction
17.fm
Jurnal f the Krean Ceramic Sciety Vl. 46, N. 1, pp. 35~40, 2009. Effects f Template Size and Cntent n Prsity and Strength f Macrprus Zircnia Ceramics Su-H Chae, Yung-Wk Kim, In-Hyuck Sng*, Hai-D Kim*,
( )-68.fm
Jurnal f the Krean Ceramic Sciety Vl. 47, N. 5, pp. 445~449, 010. DOI:10.4191/KCERS.010.47.5.445 Blating Mechanism f Artificial Lightweight Aggregate fr Recycling the Waste Glass Shin Hyu Kang and Ki Gang
44(1)-01(이기안).fm
1 w t œwz J. Kr. Inst. Surf. Eng. Vl. 44, N. 1, 011. < > Fe-%Cr-5.8%Al w š y ½ a, ya, b, œ c, ½»c,» a* a w œw, bw»» c w œw High-Temperature Oxidatin Behavir f Fe-%Cr-5.8%Al Ally Sng-Yi Kim a, Sung-Hwan
304.fm
Journal of the Korean Housing Association Vol. 20, No. 3, 2009 yw s w - û - A Study on the Planning of Improved-Hanok - Focused on Jeon-Nam Province - y* ** z*** **** Kang, Man-Ho Lee, Woo-Won Jeong, Hun
605.fm
Journal of the Korean Housing Association Vol. 19, No. 6, 2008 y k y p w sƒ Care-giver s Needs and Evaluation on the Actual Condition of the Playgrounds in Child Care Facilities y* Choi, Mock-Wha x **
35.fm
Jurnal f the Krean Ceramic Sciety Vl. 45, N. 4, pp. 208~213, 2008. Develpment f Helical Antenna using Micrwave ZST Ceramics Jng-Bae Lee, Yungjin Yk, H-Yng Sin, Hyung-Sun Kim*, Jng-In Im Simulatin Center,
( )-100.fm
Jurnal f the Krean Ceramic Sciety Vl. 47, N. 6, pp. 491~497, 2010. DOI:10.4191/KCERS.2010.47.6.491 Temperature Dependence n Elastic Cnstant f SiC Ceramics Jng In Im, Byung-W Park, H-Yng Shin, and Jng-H
29.fm
Jurnal f the Krean Ceramic Sciety Vl. 44, N. 3, pp. 169~174, 2007. A Study n the CVD Depsitin fr SiC-TRISO Cated Fuel Material Fabricatin Jun Gyu Kim, E-Sul Kum, D Jin Chi, Sung Sn Kim, Hng Lim Lee, Yung
18.fm
Jurnal f the Krean Ceramic Sciety Vl. 45, N. 2, pp. 132~137, 2008. Pre Structure Mdificatin and Characterizatin f Prus Crdierite with Chemical Vapr Infiltratin (CVI) SiC Whisker Ik Whan Kim, Jun Gyu Kim,
58.fm
Jurnal f the Krean Ceramic Sciety Vl. 44, N. 6, pp. 35~330, 007. Effect f ph n Pre Characteristics in Synthesis f High Prus AlO(OH) Gel by Hydrlysis f Al and Na Mixed Slutin Byung-Ki Park, Dng Uk Che,
85.fm
Jurnal f the Krean Ceramic Sciety Vl. 44, N. 9, pp. 502~509, 2007. Examinatin n Applicatin f High-Perfrmance Cncrete using Fine Fly Ash as Replacement Material f Silica Fume Bum-Sik Lee, Sang-Kyu Kim,
11(5)-12(09-10)p fm
w wz J. Kor. Soc. Cloth. Ind. 11«5y, 2009 Vol. 11, No. 5, pp.799-807(2009) w w * k ƒm w pg p w, ƒm w q w A Qualitative Research on Pursuing Image and Appearance Management Behavior of Brides Eun-Joo Bae
( )★56.fm
Jurnal f the Krean Ceramic Sciety Vl. 46, N. 4, pp. 379~384, 009. DOI:10.4191/KCERS.009.46.4.379 Preparatin and Characterizatin f Black Clr Zircnia by Impregnatin Methd Used by Graphite Kwang-H Lee, Jng-Pil
50(1)-09.fm
2006, Vol. 50, No. 1 Printed in the Republic of Korea 언빨래가마르는현상에대한중등학교화학전공교사들의인식조사 ½x Á» Á½ # Á x* w w yw y š w w # w w (2005. 5. 11 ) A Research of Secondary School Chemistry Major Teachers Perceptions
10(3)-12.fm
w y wz 10«3y 273~280 (2010.12.) Journal of Korean Society of Urban Environment p yá xá½k w y œw (2010 9 15, 2010 12 2 k) Analysis of Characteristics of Delivered Nonpoint Source Pollution at Forested Watershed
78.fm
Jurnal f the Krean Ceramic Sciety Vl. 44, N. 8, pp. 424~429, 2007. Dual Phase Cnductive CO 2 Membranes: Mechanism, Micrstructure, and Electrical Cnductivity Shiw Lee, Ji Haeng Yu, and Sang Kuk W Energy
93.fm
Journal of the Korean Ceramic Society Vol. 45, No. 10, pp. 625~630, 2008. Effect of Storage Conditions on the Setting Properties of Brushite Bone Cement Containing Granular β-tricalcium Phosphate Sun-Ae
( )-86.fm
Jurnal f the Krean Ceramic Sciety Vl. 46, N. 6, pp.g609~614, 009. DOI:10.4191/KCERS.009.46.6.609 Prperties f Lw Temperature Sintered Prus Ceramics frm Alumina-Zinc Brsilicate Glass Kwan S Kim, Ki Yung
132.fm
Jurnal f the Krean Ceramic Sciety Vl. 43, N. 1, pp. 805~811, 006. Effect f Oxidatin f Ni n the Micrstructure f Ni/YSZ Ande and Crack Frmatin in YSZ Electrlyte Layer fr SOFC Jun-Sil Lim,* Jng-Hn Chi,* and
103.fm
Jurnal f the Krean Ceramic Sciety Vl. 44, N., pp. 6~66, 007. Preparatin and Characterizatin f SiC Cated Graphite Fam Jae Jin Kyung, Jung Ju Kim, S Ryng Kim, W Teck Kwn, Kwang Yun Ch, and Yung Hee Kim Ec-Materials
( )-121.fm
Jurnal f the Krean Ceramic Sciety Vl. 48, N. 1, pp. 69~73, 011. DOI:10.4191/KCERS.011.48.1.069 Structural and Crrsive Prperties f ZrO Thin Films using N O as a Reactive Gas by RF Reactive Magnetrn Sputtering
64.fm
Journal of the Korean Ceramic Society Vol. 44, No. 7, pp. 375~380, 2007. Tribological Properties of Carbon Layers Produced by High Temperature Chlorination in Comparison with DLC Coating Hyun-Ju Choi,
62.fm
Journal of the Korean Ceramic Society Vol. 45, No. 7, pp. 395~400, 2008. Preparation and its Characteristics of Fly Ash-based Geopolymeric Mortar using Low Grade Silica Waste Se Gu Son, Seung Yeob Hong,
( )-103.fm
Jurnal f the Krean Ceramic Sciety Vl. 47, N. 6, pp. 546~55, 010. DOI:10.4191/KCERS.010.47.6.546 Micrstructure and Permeability Prperty f Si Bnded Prus SiC with Variatins in the Carbn Cntent In-Hyuck Sng,
10.063~070(B04_윤성식).fm
J. of Advanced Engineering and Technology Vol. 1, No. 1 (2008) pp. 63-70 Mg-3%Al-1%Zn w ƒœ» y Á x*á **Á Á w œw *w s l I ûer ** t Effect of Thermomechanical Treatment on Microstructure and Mechanical Properties
53.fm
Jurnal f the Krean Ceramic Sciety Vl. 44, N. 6, pp. 297~32, 27. Square Wave Vltammetry in Cathde Ray Tube Glass Melt Cntaining Different Plyvalent Ins Ki-Dng Kim, Hy-Kwang Kim, and Yung-H Kim Faculty f
116.fm
Jurnal f the Krean Ceramic Sciety Vl. 44, N. 12, pp. 696~702, 2007. Synthesis and Characterizatin f LSGM Slid Electrlyte fr Slid Oxide Fuel Cell Yung-Hn Seng, Seung Hwan J, P. MuralidharanS and D Kyung
16(5)-04(61).fm
Journal of Korean Powder Metallurgy Institute DOI: 10.4150/KPMI.2009.16.5.326 ƒ w Fe œ w Cu wy SPS (II) II. w SPS p ½ *Á½ Á½{ a Á½ š b w œw, a w» gœ, b y œ Production of Fe Amorphous Powders by Gas-Atomization
58.fm
Jurnal f the Krean Ceramic Sciety Vl. 4, N. 6, pp. 6~67, 008. Effects f High Energy Ball Milling n the Piezelectric Prperties f Lead-free (K 0.44 Ceramics Yung-Hyek Kim, Dae-Yung He, Wen-Pil Tai, and Jae-Shin
9(3)-4(p ).fm
w wz J. Kor. Soc. Cloth. Ind. 9«3y, 2007 Vol. 9, No. 3, pp.319-326(2007) w xk x p w q w Analysis of Foot Characteristics According to the Classification of Foot Types of Junior High School Girls Ji-Young
( )-124.fm
Jurnal f the Krean Ceramic Sciety Vl. 48, N. 1, pp. 74~79, 2011. DOI:10.4191/KCERS.2011.48.1.074 Lightweight Prcelain using GHM(Glass Hllw Micrsphere) Geun-Hee Kim, Hy-Sung Chi, Jae-Hwan Pee, W-Sek Ch,
19(1) 02.fm
Korean J. Crystallography Vol. 19, No. 1, pp.7~13, 2008 Ÿ (ICISS) w š t w (2): t w y w œw Surface Structure Analysis of Solids by Impact Collision Ion Scattering Spectroscopy (2): Atomic Structure of Semiconductor
45.fm
Jurnal f the Krean Ceramic Sciety Vl. 45, N. 5, pp. 268~275, 2008. Influence f CrCl 3 in Sphene-Pink Pigments Hyun-S Lee and Byung-Ha Lee Department f Materials Science & Engineering, Myngji University,
( )-94.fm
Journal of the Korean Ceramic Society Vol. 47, No. 6, pp. 566~571, 2010. DOI:10.4191/KCERS.2010.47.6.566 Effect of Dispersion on Tape Casted Green Sheet Prepared from Bimodal-Type AlN Powders Hong-Soo
( )-119.fm
Jurnal f the Krean Ceramic Sciety Vl. 47, N. 6, pp. 54~58, 010. DOI:10.4191/KCERS.010.47.6.54 Physical Prperties f Pyrlized Oyster Shell Cnsisting f Prus CaO/CaCO and Phsphrus Remval Efficiency ChanWn
( )-30.fm
Jurnal f the Krean Ceramic Sciety Vl. 47, N., pp. 18~188, 010. DOI:10.4191/KCERS.010.47..18 Preparatin f Ce 0.8 Gd 0. O 1.9 Pwder by Milling f CeO Slurry and Oxalate Precipitatin S-Man Sim Schl f Materials
10(3)-02.fm
w y wz 10«3y 203~211 (2010.12.) Journal of Korean Society of Urban Environment w ù p yá k«áyw *Á xá½k w y œw Á* y w (2010 9 15, 2010 12 2 k) Characterization of Nonpoint Source Pollutant Loads from the
fm
Jurnal f the Krean Ceramic Sciety Vl. 46, N. 2, pp. 175~180, 2009. Effects f Glass Frit Size n the Sintering Behavir f Cu Terminatin Paste in MLCC Kyuha Lee, Byungjun Jen, Chang-Hn Kim, Yunggeun Kwn, Myungjun
( )-83.fm
Journal of the Korean Ceramic Society Vol. 8, No. 1, pp. 0~5, 011. DOI:10.191/KCERS.011.8.1.00 Solidification of Heavy Metal Ions Using Magnesia-phosphate Cement HunG Choi, Hyun Ju Kang, Myung Shin Song,
( )-112.fm
Jurnal f the Krean Ceramic Sciety Vl. 47, N. 6, pp. 61~617, 010. DOI:10.4191/KCERS.010.47.6.61 Extractin f Mg in and Fabricatin f Mg Cmpund frm Ferr-Nickel Slag Yng Sik Chu, Y Ree Lim*, Hng Bum Park, Hun
( )-10.fm
J. f the Krean Sensrs Sciety Vl. 19, N. 6 (2010) pp. 483 489 DOI : 10.5369/JSST.2010.19.6.483 pissn 1225-5475/eISSN 2093-7563 p w» w v y Á Temperature sensr withut reference resistr by indium tin xide
( )47.fm
Jurnal f the Krean Ceramic Sciety Vl. 46, N. 3, pp. 242~248, 2009. DOI:10.4191/KCERS.2009.46.3.242 Lw Temperature Synthesis f Frsterite Pwders by the Geplymer Technique Se Gu Sn *, **, Ji Hyen Lee**, Sang-Hn
( )67(홍성현).fm
Jurnal f the Krean Ceramic Sciety Vl. 46, N. 5, pp. 505~509, 009. DOI:10.4191/KCERS.009.46.5.505 Wear Prperties f Silicn Nitride Nan-Ceramics Jae-Hee Kim, Venkata Manj Kumar B, Wn-Sik Kim, and Seng-Hyen
18(3)-06(09).fm
Jurnal f Krean Pwder Metallurgy Institute DOI: 10.4150/KPMI.2011.18.3.256 Cu, Zn, Sn, Se yw p e w xá yá Á xá½³y* û w œw Effects f Ball Milling Cnditin n Sintering f Cu, Zn, Sn and Se Mixed Pwders Jng-Hen
51.fm
Jurnal f the Krean Ceramic Sciety Vl. 44, N. 5, pp. 279~283, 2007. Preparatin and Characterizatin f BCB Resin-BNT Cmpsite Substrate Materials Un-Yng Kim, Myung-Py Chun, Jung-H Ch, Byung-Ik Kim, Yng-Hyun
21.fm
Jurnal f the Krean Ceramic Sciety Vl. 45, N., pp. 67~7, 008. Structural Stability During Charge-Discharge Cycles in Zr-dped LiCO Pwders Sen Hye Kim*, Kwang-B Shim**, Jae-Pyung Ahn***, and Chang-Sam Kim
( )-101.fm
Journal of the Korean Ceramic Society Vol. 47, No. 6, pp. 503~508, 2010. DOI:10.4191/KCERS.2010.47.6.503 The High Density Sintering of Green-emitting -SiAlON:Eu Ceramic Plate Phosphor Young-Jo Park, Sung-Hoon
50(4)-10.fm
2006, Vol. 50, No. 4 Printed in the Republic of Korea 칼코겐이도핑된망간산화물의저온합성연구 k Á z Á, *Áy, * y w ù w yw x ù l w» ww (2006. 7. 13 ) Chimie Douce Synthesis of Chalcogen-Doped Manganese Oxides Seung Tae Lim,GDae
( )-123.fm
Journal of the Korean Ceramic Society Vol. 48, No. 1, pp. 63~68, 2011. DOI:10.4191/KCERS.2011.48.1.063 Effects of Substituting B 2 O 3 for P 2 O 5 on the Structure and Properties of SnO-P 2 O 5 Glass Systems
10(1)-08.fm
w y wz 10«( 1y) 47~52, 2007 J. of the Korean Society for Environmental Analysis œ w t y ½ xá Á x Á½ Á x* Ÿ œ, * w œw Optimization of Coagulation In The Conventional Water Treatment Plant Jun-Hyun Kim,
한 fm
Jurnal f the Krean Magnetics Sciety, Vlume 19, Number 6, December 2009 DOI: 10.4283/JKMS.2009.19.6.209 œe w w r p(bam) x» e ph w Áû k w œw, z w¼1, 200-701 (2009 10 7, 2009 11 20, 2009 11 21 y ) M-type
9(1) 이채현.fm
Jurnal f Dental Hygiene Science Vl. 9, N. 1 pp. 75~81 (009) 3Y 지르코니아조성에서 Glass Frit 의첨가량에따른소결거동및기계적특성의변화 ³ Á«Á x 1 û w e»œ, x w e»œ, w œw Effect f Glass Frit n the Sintering Behavir and Mechanical Prperties
fm
Jurnal f the Krean Ceramic Sciety Vl. 46, N. 2, pp. 155~160, 2009. Thermally Stimulated Deplarizatin Current Test fr Reliability f X5R MLCC Ji-Yung Park, Jae-Sung Park, Yung-Tae Kim, and Kang-Hen Hur MLCC
( )42.fm
Jurnal f the Krean Ceramic Sciety Vl. 46, N. 3, pp. 8~87, 009. DOI:10.4191/KCERS.009.46.3.8 Optimizatin f Rd-shaped γ-lialo Particle Reinfrced MCFC Matrices by Aqueus Tape Casting Hyun-Jng Chi, Mi-Yung