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¨´„¬–³„µ¦³šo°œ °Š¦´Š¸Á°„ŽrÂ¦„„rÁž}œ„µ¦œ·¥µ¤Á„¸É¥ª„´‡nµ °Š full width at half maximum
(FWHM) ×¥¤¸ ¤„µ¦Áž}œ
2 2 2 tan tan H U V W T T (6)
×¥ U , V ¨³ W Áž}œ˜´ª—Î µÁœ·œ„µ¦ ´—Á„¨µ
„µ¦«¹„¬µÃ‡¦Š¦oµŠ °Šª´ —» ¤¸‡ªµ¤Áž} œÅžÅ—oš¸É˜o°Šª·Á‡¦µ³®r¨´„¬–³‡ªµ¤„ªoµŠ °Š„µ¦Á¨¸Ê¥ªÁœ °Š
¦´Š¸Á°„Žr œ´ Áž}œ·ÉŠ‹ÎµÁž}œÎµ®¦´„µ¦‡Î µœª– œµ—Ÿ¨¹„¨³‡ªµ¤Á‡¦¸¥— °ŠÂ¨˜˜· Ž „µ¦ ´—Á„¨µÂÁ¦¸ ¥šÁª¨—r
čo¦¼žÂ„µ¦Á¨¸Ê¥ªÁœ °Š¦´ Š¸Á°„Žrª·Á‡¦µ³®r„µ¦Á¨¸Ê¥ªÁœÂ˜n¨³Áo œÁž˜¦´¤Á¡ºÉ °°›·µ¥Á®˜» „µ¦–rš¸É Á„·— ¹Êœ ‡nµ
„µ¦³šo°œ¦´ Š¸Á°„Žr Â¦„„r(FWHM) Áž}œ¢{Š„r´œ °Š T ‹³¤¸‡ªµ¤‡¤´ —(sharp) ¤¸¦¼žÂš¸É ¤¤µ˜¦
¨´„¬–³¦µ¥Á°¸¥— °ŠÁoœÁž„˜¦´¤ ˜o °Š¤¸ ¨´„¬–³Á—¸¥ª„´œš´Ê Š®¤— —´Šœ´Êœ„µ¦ ´ —Á„¨µÂÁ¦¸¥šÁª¨—r˜o°ŠÁž}œ
¨´„¬–³š¸É ¥°¤¦´Å—o¨³Áž} œ¦¼žÂš´ÉªÅžÁ„¸É¥ª„´˜´ª—Î µÁœ·œ„µ¦ °ŠÃ‡¦Š¦oµŠ
ž{‹‹´¥ R (R-factor) ™¼ „œÎµ¤µÄoÁž}œÁ„–”r 宦´„µ¦¨Š˜´ª(fit) p R Áž}œ¦¼ žÂ °Šž{‹‹´¥ R wp R
Áž}œ¦¼ žÂœÊ宜´„ °Šž{‹‹´¥ R ¨³ exp R Áž}œž{‹‹´¥„µ¦¥°¤¦´ž{‹‹´¥ R œ´Éœ‡º°
100 oi ci
p
oi
y y
R y
¦
¦ (7)
1
2 2
2
( )
100
( )
i oi ci
wp
i oi
w y y
R w y
½ ° °
® ¾
° ° ¯ ¿
¦
¦ (8)
1
2
2
(
100
( ) exp
i oi
n p C
R w y
½
° °
® ¾
° ° ¯ ¿ ¦ (9)
¨³ S Áž}œ¨Š˜´ªš¸É —¸(goodness of fit) œ·¥µ¤Áž}œ
exp
wp R
S R (10)
×¥š¸É n Áž}œ‡nµ‹Îµœªœ‹»— o°¤¼¨ P Áž}œ˜´ª—εÁœ·œ„µ¦š¸Éž¦´ Áž¨¸É¥œ ¨³ C Áž}œ‡nµ‹ÎµœªœÁŠºÉ°œÅ ´Š‡´
(constraint)
‡nµ S Áž}œ—´œ¸ š¸É—¸°Š„¦³ªœ„µ¦ ´—Á„¨µ ‡ªµ¤Â˜„˜nµŠ‹µ„Á ¸¥œ„¦µ¢ °Š¦¼ žÂ„µ¦Á¨¸Ê¥ªÁœ‹³
Áž}œŸ¨¨´¡›r°Š„µ¦ ´—Á„¨µ
°»ž„¦–r¨³ª· ›¸„µ¦
„µ¦Á˜¦¸¥¤ÁŽ¦µ¤·„ MgTiO3 ×¥ª·›¸ „µ¦Ÿ¤°°„ÅŽ—r—´ÊŠÁ—·¤‹µ„ MgO (Unilab, 96%) TiO2
(Scharlau, 99%) Ÿ¤„´œÃ—¥´—nªœÃ¤¨ —œµœ 24 ´ÉªÃ¤Š ÁŸµÂ‡¨ÅŽœr (calcined) š¸É°»–®£¼¤· 1,200oC œµœ 3
´ÉªÃ¤Š ¨oªœÎµ¤µ—°¸„‡¦´ÊŠœµœ 12 ´ÉªÃ¤Š Á˜·¤ PVA 5% œÎµÅž°´—Á¤È—¨o ªœÎµÅžÁŸµ°Ÿœ¹„š¸É°»–®£¼¤· 1,250oC
œµœ 3 ´ÉªÃ¤Š ˜¦ª‹°„µ¦Áž¨¸É¥œÂž¨ŠÁ¢—oª¥ XRD (Phillips, PW3710, MPD) ®¨nŠ¦´Š¸Á°„Žr‹µ„ CuK D
‡ªµ¤¥µª‡¨ºÉœ O 1.54060 o
A ¦Š—´ œÅ¢¢jµ 40 kV „¦³Å¢¢jµ 30 mA «¹„¬µš¸É 7 2 90o o T „ε®œ—
ǦŠ¦oµŠŸ¨¹ „—oª¥Ãž¦Â„¦¤ X’Pert High Score Plus