1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS L ISO 18757 BET KS L ISO 18757： 2012 2012 11 30 http:/www.kats.go.krKS L ISO 18757:2012 : ( ) ( ) KCC ( ) : (http:/www.standard.go.kr) ： ：2002 12 27 ：2012 11 30 2012-0661 ： ： ( 02-509-7270) (http:/www.kats.go.kr). 10 5 , . KS L ISO 18757:2012 i ii 1 1 2 1
2、 3 .1 4 2 5 3 6 3 6.1 .3 6.2 3 6.3 5 6.4 6 7 .7 A( ) 8 B( ) .9 C( ) 10 KS L ISO 18757:2012 ii 2003 1 ISO 18757, Fine ceramics(advanced ceramics, advanced technical ceramics) Determination of specific surface area of ceramic powders by gas adsorption using the BET method , . KS L ISO 18757:2012 BET F
3、ine ceramics Determination of specific surface area of ceramic powders by gas adsorption using the BET method 1 BET(Brunauer, Emmet, Teller) ( 2 nm ) 1. KS A 0094 . . BET Type I , . KS A 0094, IUPAC 2,3 . 2 . . ( ) . KS A 0094, ( ) ISO 9277： 1995, Determination of the specific surface area of solids
4、 by gas adsorption using the BET method . 3 . 3.1 3.2 KS L ISO 18757:2012 2 3.3 3.4 3.5 ( 50 nm ) ( 2 nm , 50 nm ) 3.6 4 SI 1 . IUPAC . (g) . 1 ISO SI IUPAC am (complete monolayer) nm2amas m2g 1asC BET 1aC L ( 6.0221023) mol 1L m g m ma amana mol g 1nanm (specific monolayer) ( ) mol g 1nm, nmanm, mp
5、 mol g 1 nm, sp g 1 p Pa p p0 Pa p0t s t T K T Va m3g 1VaaKS A ISO 31 0 , 1 ( ) SI 1, 1 . KS L ISO 18757:2012 3 5 ( 1) (complete monolayer) . 1 ( ) (KS A 0094) BET . CnCCnppnppmpm,mpm,0a011)/(1/ +=(p /p0) ( ) , . N2 (77 K) . Kr Ar N2 . Kr Ar 1m2 5m2 . , . . p , p/p0 . , . 2, 3 . 6 6.1 KS A 0094 6.2
6、6.3 . . 6.2 . (outgassing) . , KS L ISO 18757:2012 4 . (150 300 ) . 1 Pa( 0.1 Pa) . 8 , 303 . . a) , , 1 Pa2 Pa , . , . b) . . ( ) . . , . (TGA) . 2 . A, B, C, D . A1, B1, C1 1 . , ( 2 X, Y, D ) . , . , . . , , . 2 c) , KS L ISO 18757:2012 5 . d) , (flushing gas method) , . e) , . . N2 10 2 Pa/s . K
7、r Ar 10 4 Pa/ . 10 410 5 . . f) 10 3 Pa 1030 . , . 6.3 KS A 0094 , . a) / p0 . 2 . b) 99.99 % . He 99.999 % . c) 1 %(0.1 % ) . . d) . ( 10 mm , ). e) ( 10 5 ) . ( 77 K), 10 4 10 torr(1 333 Pa) . f) . ( ) 5 m2100 m2 ) 1 m2100 m2 ( ) 1 m230 m2( ) 0.2 m25 m2 ( ) 0.2 m25 m2( ) 0.02 m20.5 m2KS L ISO 1875
8、7:2012 6 g) Kr Ar , / . N2 . N2 , , Kr Ar . 2 N2, Ar, Kr . ( mmHg , . 1 mmHg 133.32 Pa)5. logp0 ATB ClogT DT ET2 2 , , ( 5 ) A B C D103E106N221.623 455.57 7.510 7 17.214 He 2.382 6 2.832 3 4.199 2 506.18 38 084.1 Ne 1.469 1 70.075 3.060 7 14.362 Ar 24.018 542.78 8.443 16.824 3 , , ( 4,5,6 ) N277K Kr
9、77K Ar77K Ar87K Molecular cross sectional area/nm20.162 0.210 0.166 0.142a/K p0 /Pa /K p0 /Pa 75.40 80 019 210.38 19 344 81.27 53 329 75.85 86 595 234.11 20 868 83.50 66 661 76.35 89 911 263.18 22 675 85.10 79 994 76.90 96 048 298.78 24 811 86.51 93 326 77.15 98 941 316.24 25 836 87.28 101 325 77.35
10、 101 303 330.91 26 680 87.77 106 658 77.55 103 707 346.11 27 547 88.91 119 990 77.85 107 395 370.10 28 891 89.97 133 323 78.35 113 760 413.30 31 250 91.85 159 987 78.85 120 407 460.90 33 766 94.27 199 984 a . 4 h) BET p/p0 0.3 . BET , , , BET ( ). 6.4 KS A 0094 7. . BET . a) 4 0.050.3 , KS L ISO 187
11、57:2012 7 . b) BET , 0.999 . . 1) , . . ( 4 ), . 0.999 9 , BET C . 2) BET . , BET . 3) BET . BET . BET , . , 2 ( ) . BET . 7 . a) b) , , , c) , , , , d) , , , , , , e) (g) f) , , , , , , g) ( , , ) h) na： (p/p0) mol/g , (K), (Pa) i) ：1) 2) , BET , , (mol/g), C , am(nm2) j) k) as(m2/g) 1) , BET , , B
12、ET C2) , ( C . .)KS L ISO 18757:2012 8 A ( ) A.1 m2g1 Pa Alumina 50300 200 1 h(min) 0.1 Alumina 0.125 200 1 h(min) 1 Bohemite 50100 105 1 h(min) 1 Silica nonporous 10100 160 3 h 1 Silica mesoporous 200 200 3 h 0.1 Silica(mica) 0.110 200 3 h 0.1 Silica/alumina 200 300 3 h 0.1 Quartz 0.110 200 3 h 1 S
13、ilicon carbide 130 200 3 h 1 Silicon nitride 130 200 3 h 1 Kaolin(Kaolinite) 10100 200 3 h 0.1 Titania(rutile) 110 120 200 24 h 1 h 1 Glass fibers 0.11 120 24 h 0.1 KS L ISO 18757:2012 9 B ( ) B.1 m2g1 h Pa NIST Gaithersburg, MD 208990001, USA ; (301)9756776, Fax (301)9483730, Email：SRMINFO enh.nist
14、.gov RM 8570 Calcined Kaolin 10.90.50 300 3 0.1 RM 8571 Alumina 158 300 3 0.1 RM 8572 SilicaAlumina 291 300 3 0.1 (SRM 1900) Silicon nitride 2.850.09 300 3 0.1 BAM Rudower Chaussee 5, 12489 Berlin;49 30 6392 5830, 49 30 6392 5787; Email：doris.wiedemannmailgw3.bamberlin.de CRM BAM PM 101 Silica 0.177
15、0.004 CRM BAM PM 102 Alumina 5.410.04 CRM BAM PM 103 Aluminatype 60 156.01.3 CRM BAM PM 104 Aluminatype 150 79.80.4 BCR Frederique Siccardi ; Email MRM Sales CRM 169 Alumina 0.1040.012 75 12 0.1 CRM 170 Alumina 1.050.05 140 12 0.1 CRM 171 Alumina 2.950.13 140 12 0.1 CRM 172 Natural Quartz 2.560.10 1
16、40 12 0.1 CRM 173 Rutile TiO28.230.21 140 12 0.1 CRM 175 Tungsten 0.1810.031 140 12 0.1 KS L ISO 18757:2012 10 C ( ) 1 BRUNAUER, S., EMMET, P.H., and TELLER, E.： Adsorption of gases in multimolecular layers; J. Am. Chem. Soc., 60, 1938, pp.309 319 2 SING, K.S.W., EVERETT., D.H., HAUL, R.A.W., MOSCOU
17、, L., PIEROTTI, R.A., ROUQUEROL, J., and SIEMIENIEWSKA, T. ; IUPAC recommendations 1984 ; reporting physical adsorption data for gas/solid systems with special reference to the determination of surface area and porosity ; pure IUPAC recommendations for characterization of porous solids ; Pure Adsorp
18、tion, surface area and porosity ; Academic Press, London, 2ndedn., 1982 5 YAWS, C. ; Physical properties ; McGraw Hill, New York, 1977 6 ZIEGLER, W.T., YARBROUGH, D.W., MULLINS, J.C. ; Calculation of the vapor pressure and heats of vaporization and sublimation of liquids and solids below one atmosph
19、ere pressure ; Technical report No.1 for project No. A 764, National Bureau of Standards, Washington, 1964 7 KS A ISO 31 0, 0： 8 ISO 8213:1986, Chemical products for industrial use Sampling techniques Solid chemical products in the form of particles varying from powders to coarse lumps BET 153787 1 92 3(13) (02)26240114 (02)262401489 http:/ Korean Agency for Technology and Standards http:/www.kats.go.kr KS L ISO 18757:2012 KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Fine ceramicsDetermination of specific surface area of ceramic powders by gas adsorption using the BET method ICS 71.040.20
