166page

(+) (+) ("I) (ul) Le .J"J f^l= z[rJd "t El#€$ tzl l.+ r. d"J]'E "l EEI+ f,rl-A +";6J4. *a!rlt$ t+alzl 96ll^l= = zllgE 4R t zzlE t|46I^J 'J"J+4. +7la ,Jg -J 4 q = +6I +EI ql ulz-lr-l E 7Iq9 +-?*ql rl4 *'*"] ujxlzl 9+E+ B q=+. elg€ -7Ag aal= ol+6}q Ezlqzl n\zlz) e*E+ =daB4 *g++. (lB 8 +=) s. Edl|= -dtr|. eD oJ+trlts Hg *al9 qq= EelzlE+Ele-l t+ p +A g+E ulzlagol algE E +?l€ E9zl"I^l +6tl= 6lol6-J4. (zB g +=) (4 *"Jg zl;l"1 +7) ^l+fl$ 4 tEI *zl5 96Iq "JFplf d+ +xrl$ +E* s.Eql 'J qiL *aIzI Tl6Jgql ulr_lrl +'J s.Eg .J^J +41(rl+zl)-tr. Hq=q. (-s + +e) CD ^Jg zl+ol +d6l +sE +tsal _nHI6Lq C+g +"J6Ial a}] =+. (+) gFulE tISg #g ^la qql +6I6Lq+ 6}q, gE= 750-780'C -H4 *g gEql^'l *aI rI€ oF +4. ("I) +6ll . ' .1 zJol zJ olzl E t+Eg "J^J z*"] r*olzl a itzl.$ ++"*ol +7I6Iq zllzfl$ol+ € g FE €EI"l v*olxlrr_e +E"Iot t4. 6. EJ)1.\ ilal= -dE-|. eD +F++"rl g++ 71.= {lAt;l7l flflirl= + + ,JB Fes *zl: il4E ++. OD 9a 71.= ^I+$ Qql= * 720"C oil^1 + ej lookg 41 qldl E loBrJ F;IfrI. ol4 g A 71.= d+ +{! F"I 9"tlrJ +Efl g+ allo} 6'Iq, *"J*ol +'*"I d6I= +Eql= 4€+ E= +€+g qg6}q rI*aIot +4. (r3 ro aue) eD gElo}€ E= €Elol€4 €El$F"ltsel g. EIE(+zlEl 1 :1)9 ^I*'J qql= * 0.2"c E zlal€ +E6l -LH}all ?qot+4. 1o3 _ =-ul} 7d_) ral 7 ^l=el qlg ++ Ll+ Tl-ol ^lol HFHI "l E:l-l d El d l= leJ 8 500 50fi 600 650 700 750 800 850 900 3rc ral e Hz lTlg'oll^l At4el +tq E6]lE 2.2 2.0 1.8 a 1.6 ,O H > t.4 tr u t.2 'lo do 1.0 c! 0.8 0.6 0.4 0.2 0 tr rsod sooH ad4 =B4 E= +Bal?+ E. rflEzl!$ 't-] dcl + 6ll + soBol a4'J 4+ +sE ooE *tl olEq a+ zoi soE / "4n / / / I I I I r.d -158-