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1 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 f 3Y-ZrO Gyu-Sun Lee 1, Eun-Ja Kwn and Chae Hyun Lee 1 Dept. f Dental Technlgy, Dngnam Health Cllege, Gyenggi-D , Krea Dept. f Dental Technlgy, Hyejen Cllege, Chungnam-D , Krea Dept. Materials Engineering, Paichai University, Daejen-City , Krea "CTUSBDU The effect f glass frit n the sintering behavir and mechanical prperties f 3 ml% Y O 3 -dped zircnia(3y-zro ) have been studied. Up t 30 wt% f glass frit was added t 3Y-ZrO. Sintering was perfrmed in a bx furnace up t 1300 C fr specimens with glass frit and 1600 C fr specimens withut glass frit in air fr 1h. Relative density and mechanical prperties were measured t investigate the effect f glass frit. The additin f glass frit enhanced bth sintered density and mechanical prperties f 3Y-ZrO which is suitable fr dental applicatins. Maximum sintered density 93.3% f theretical density was btained with the specimens cntaining 30 wt% frit sintered at 1300 C, whereas the ptimum amunt f frit additin fr mechanical prperties was determined as 10 wt%. Maximum value f strength, fracture tughness, and Vickers micrhardness fr specimens with glass frit were 06 MPa, 3.4 MPa m 1/, and 5.3 GPa, respectively.,fz XPSET 3Y-ZrO, Sintering behavir, Mechanical prperties 서 e, ü, w wš yw ù, ƒ ûš w q» ü yw -. ù n 1,) w n, n ƒ». w w w xk 3) all-ceramic system š. All ceramic crwn e ƒ¾ n xw ey ù., e Crrespnding authr Tel: Fax: chlee@mail.pcu.ac.kr 론 š, ü yw ƒ, ƒ š, n e k w. w w» w e Ì y e wš q ú. ¾ e en ù y. 4,5) ù š ù y w w ù w ƒw ƒ n ƒ w w š, 6,7) y w š w w y w w ƒ š ƒ û. w w» p w ƒ ƒw g e

2 Effect f Glass Frit n the Sintering Behavir and Mechanical Prperties f 3Y-ZrO š. g w w ƒ š q w p. p w g Y O 3 ƒw y g», ü ù, ù e w xk ƒœ w» 8,9) w w CAD/CAM ù CAM system direct ceramic machining š. e ƒ š g e frit ƒwš frit ƒ ƒ g e y» p e w š wš w. 재료및방법 1. w g frit. g 3ml% Y O 3ƒ ƒ (TZ-3Y, Tsh, Japan) z w. g x Fig. 1. ƒ frit Table 1 ƒ e frit. frit s³ q 13.0X10-6 /K š -70 mesh z w. Frit x Fig... 1) r g 10~30 wt% fritƒ ƒ g frit ƒƒ e w plyprpylene» š g g w 4 ball millingw yww z, rtary evapratr(r-114, Bchi, Swiss) g k z 80 C ven 4 w yw. yw 80 mesh m g y w z š 1.1 tn/cm ƒw 40 mm 9 mm 4 mm barx r w. x r e d w x w. x r MSi w x» 10 C/min wš 1 w w. frit ƒ g 1100 C 1600 C w š frit ƒ 1100 C, 100 C, 1300 C w. z þw. ) z r Ÿw x (Optipht-100, Nikn, JAPAN) x (ABT-3, Tpcn, JAPAN) w w. w w r t w z X z (XD-D1W, Shimazu, Japan) ww. z 'JH As-received 3Y-ZrO pwder. 'JH As-received frit pwder. 5BCMF Chemical cmpsitins f dental frit SiO AL O 3 K O Na O BaO CaO Li O Others Frit-G Cu-Kα w 0 80 θ ww. 3)»œ d»œ ò r»œ ƒ e w w z, ƒ r d w j d w l w.» 1 w w. (1)

3 Jurnal f Dental Hygiene Science Vl. 9, N. 1, pp. 75~81 (009) 4)» p sƒ» p q, q d w. q 3 š d w. barx r t wš x» (RH15-5DZ, Hunsfield, England) w 5 mm, crss-head speed 0.5 mm/min r q w d w z w 3 š w. σ 3p 3PL = bd» P q w š L, b r s, š d r Ì. r Vickers indentatin d w. SiC Paper w #000¾ t z, 1 µm r p w. d w Vickers indenter(mdel FV, Future-Tech, Japan) 0.3 kgf w ƒwš 10 w x w z, Ÿwx x w j» d w. Vickers ƒ w 3z d w j» w w. () 'JH Effect f sintering temperature n relative density and strength f 3Y-ZrO. H = P/a (3)» P ƒw w š a x ƒ ¼. q Vickers indentr 0.3 kgf, 0.5 kgf, 1 kgf, 3 kgf w 10 w ³ x w z, x ³ ¼ d w w. K IC = 0.076(P/c 3/ ) (4)» P ƒw w š c w ¼ ³ ¼. 결 과 1. Frit ƒ g» p Frit ƒ g š w š w. Fig. 3 as-received k 3Y-ZrO xw 1100 C 1600 C¾ œ», 1 w z d w 3 š š. g 1100 C w û ùkü ƒ ƒw 'JH Effect f sintering temperature n fracture tughness and Vickers micrhardness f 3Y-ZrO. (ù :Hardness, þ : tughness) ƒ 1300 C 84% ùk ü š, 1500 C ƒ¾ e w. 3Y-ZrO x w. 3 š ƒ û 1300 C ¾ 100 MPa e w û ƒ ƒ j ƒw w ùkü. ƒ 1500 C 504 MPa ùkü š ƒ 1600 C w w ùký. ƒ 1500 C š y ƒ

4 Effect f Glass Frit n the Sintering Behavir and Mechanical Prperties f 3Y-ZrO ùkù» ƒ. Frit ƒ g q Vickers Fig. 4 ùkü. q Vickers 1100 C w r ƒ û d ƒ w š, ƒ ƒw ƒw w. q Vickers 1600 C w r ùkü ƒƒ 7.1 MPa m 1/, 1 GPa.. Frit ƒ» p y Fig. 5 g frit ƒw frit ƒ y ùkü C¾ w. ƒ, frit w ƒ x w w kƒ». ƒ ù frit ƒ ƒ w ùký. e frit w û j ùkû. ƒ 1100 C frit ƒ ƒw ƒw 30 wt% frit ƒ 83% ùkü. ƒ 100 C 10 wt% ƒ ƒ j ƒw frit ƒ ƒ w ùkû. 30 wt%ƒ ƒ frit ƒ ƒ ƒ ƒw w š. ù 1300 C w frit ƒ 0 wt% ƒ ƒ š frit ƒw ƒ 0 wt% ƒw w s w ùk ü. Fig. 6 frit ƒ 3 š y ùk ü. w frit ƒ w ƒ š w w ùký. w frit ƒ ƒ š ƒw. w frit ƒ 3 š y ƒ., 1100 C w frit ƒ 0 wt% š ùkü w, ƒ 100 C 1300 C frit ƒ 10 wt% š ùkü. š frit ƒ g û w 100 MPa w û ùkü frit ƒ frit 10 wt% ƒwš 1300 C w 06 MPa. w y frit ƒ w» g û frit ƒ ƒ w» 'JH Effect f the cntent f frit n relative density f 3Y- ZrO -frit system. 'JH Effect f the cntent f frit n strength f 3Y-ZrO -frit system. z ƒ w» q C w frit ƒ w ƒƒ j ùkû 0 wt% ƒw ùkù. Frit ƒ q y Fig. 7 v ùkü. q Vickers w indentatin d w C w ƒ û» x w» š q y d w ƒ w. 100 C p 1300 C w r l d q š y

5 Jurnal f Dental Hygiene Science Vl. 9, N. 1, pp. 75~81 (009) 'JH Effect f the cntent f frit n fracture tughness f 3Y- ZrO -frit system. w y ùký. q Vickers œ frit ƒ 10 wt% ùkü. w w œ ùkü. q 10 wt%ƒ ƒ r 1/ 3.4 MPa m d, 100 Cù 1300 C w ùkû C r frit 'JH Effect f the cntent f frit n Vickers micrhardness f 3Y-ZrO -frit system. ƒ 0 wt% frit ƒ r û ùkü, ƒ frit w» w, g w q û» ƒ. Fig. 8 frit ƒ Vickers y v. 100 C w frit 'JH SEM micrgraphs shwing fracture surface f 3Y-ZrO -frit system; (A) 100 C, 10 wt%, (B) 100 C, 30 wt%, (C) 1300 C, 10 wt%, and (D) 1300 C, 30 wt%.

6 Effect f Glass Frit n the Sintering Behavir and Mechanical Prperties f 3Y-ZrO ƒ 10 wt% ùkü ƒ ƒw ƒ w w ùkü C w r 0 wt%¾ ƒw ƒ frit ƒ w w ùkü. ù frit ƒ ƒ y j 5.3 GPa ùkü. e w g 1 GPa w û, û ƒ û frit ƒ» w. 100 C 1300 C r q x w Fig. 9. q x ü q ù ký. ƒ ƒ š»œ y w. w frit ƒ 10 swt% 30 wt% ƒw y j»œ j» f, (B) (D) r ƒ, frit ƒ w w x» w ƒ. l q Vickers ƒ frit ƒ 30 wt%ƒ w frit» wš. 고 찰 Seghi RR e q 10) j» w w y w ù g ƒw yw š w, Thmpsn JY» ƒœ 11) w t w yw š w. 1) Hulbert SF e yw» w ù ƒ q ƒ û 13) yz» w š w, Denry IL ù g ƒ w q w š w. Kn M e g 14) 50 wt% ƒw q š w š x. š Kasuga T ù k 15) 380 GPa ù p yw g k 00 GPa š k xw g š ù š w. g 1,170 C ¾ w,,,370 C yw. g ƒ w þƒw w y 3~4% v q w x w ü ³ w g yw» w w w. ù CaO, MgO, Y O 3 GeO y y g ƒw yw g (PSZ) x w w w. MgO yw g w w ù, w»œ w ƒ Y O 3 yw š w 100% x w. 16) w Y O 3 ZrO» ³ w sw x w p y g (3 ml% Y O 3 - ZrO ) w» w. 17) Kn M e 18) ZrO yww 1,170 C w g w SiZrO 4 x w š w, Kn M 19) e g 3 wt% ƒw q ƒw ù š yw š w š, e ZrO, Y O 3 ( wt%) ZrO, CaO ( wt%) y w ZrO 50 wt.% ƒw š d w ƒƒ 70, , MPa g ƒ w ƒ û š (70 MPa), 6.5 wt% Y O 3 yw ZrO ƒw ƒ š (134 MPa) ùkþ š šw. 요 e w g frit ƒwš frit ƒ y» p y š wš w. g frit ƒw w z. ù ƒ 1400 C w r x w kƒ» 1300 C w. frit ƒ š ƒ ƒ ƒw w ùkü. frit 0 wt% ƒwš 1300 C w 93.3 % ùkü. r w» d w š, q, Vickers w, frit ƒ 10 wt% ƒ ùkü. 3 š, q, Vickers ƒƒ 06 MPa, 3.4 MPa m 1/, š 5.3 GPa ùkû. g frit ƒw û š w j wr w» p ƒ g w û ƒ frit ƒ w 약

7 Jurnal f Dental Hygiene Science Vl. 9, N. 1, pp. 75~81 (009) w z» p w z ƒ w 10 wt% frit ƒ» p ùkü q. 감사의글 007 û w w w. 참고문헌 1. McLean JW: The science and art f dental ceramics. Quintessence Pub. C, : 1-4, Campbell SD: A cmparative strength study f metal-ceramic and ceramic materials: mdulus f rupture. J prsthet Dent 6: , Ju TH, Oh SC, Dng JK: A study n the fitness f the IPS empress ceramic crwn accrding t margin type. J Krean Acad Prsthdnt 36: , Piddck VQ: Dental ceramcis update. J Dent 18: 7-35, Bae TS: Characteristics f dental ceramic materials and tughening mechanisms. Clinical Dentistry 0: , Jhnstn WM, O Brien WJ: The shear strength f dental prcelain. J Dent Res 59: , Oli G: Flexural strength and internal defects f sme dental prcelain. Acta Odntal Scand 18: 313-3, Kern M, Wegner SM: Bnding t zircnia ceramic: Adhesin methds and their durability. Dent Mater 14: 64-71, Ksman T, Oblak C, Jevnikar P, Funduk N, Marin L: The effect f surface grinding and sandblasting n flexural strength and reliability f Y-TZP zircnia ceramic. Dent Mater 1515: , Seghi RR, Denry IL, Senstiel RO: Relative fracture tughness and hardness f new dental ceramics. J Prsthet Dent 74: , Thmpsn JY, Bayne SC, Heymann HO: Mechanical prperties f a new mica-based machinable glass ceramic fr CAD/CAM restratins. J Prsthet Dent 76: , Hulbert SF: The use f alumina and zircnia in surgical implants. An intrductin t biceramics. Hench LL and Wilsn J eds., Singapre, Wrld Scientific Publishing C., pp.5-40, Denry IL: Recent advances in ceramics fr dentistry. Crit Rev Oral Bil Med 7: 134-l43, Kn M, Ishikawa K, Kuwayama N: Effects f zircnia additin n fracture tughness and bending strength f dental prcelain. Dent Mater J 9: , Kasuga T, Nakajima K, Un T, Yshida M: Biactive glassceramic cmpsite tughened by tetragnal zircnia. CRC Handbk f Biactive ceramics Vl. I: 137-l4, Ahmad I: Yttrium-partially stabilized zircnium dixide psts, an apprach t restring crnally cmprmised nnvital teeth. Int J Peridntics Restrative Dent 18: , Burger W, Richter HG, Picni C, Cittadini A, Bssi D, Bccalari H: The imprtance f the raw material surces fr medical grade zircnia. Biceramics vl. 7 edited by Anderssn H and Yli-Urp A: , Kn M, Kawan F, Tada Y, Inue S, Asaka K, Matsumt N: Effect f crystallizatin n fracture strength f castable glass-ceramics cntaining tw crystals. Dent Mat J 13: 47-54, Kn M, Ishikawa K, Kuwayama N: Effects f zircnia additin n fracture tughness and bending strength f dental prcelain. Dent Mater J 9: , (Received Octber 10, 008; Accepted March 9, 009)