Proiect: PN-III-P4-ID-PCE-2020-1988

Proiect: PN-III-P4-ID-PCE-2020-1988

Contract: PCE 168/2021

5$3257 ܇7,,1܉,),&

privind implementarea proiectului vn perioada ianuarie-decembrie 2021

,QJLQHULD PDWHULDOHORU FHUDPLFH SRUR-, DpirVoeHlec trIiciăcuUă S DSOLFDаLL GH FROHFWDUH GH HQHUJLH

Rezumat etapăI:

ÌQ DFHDVWăD XS UILRPVăW HUWHD܊DSLOdOiLn Hp]laDnuWl dHe reaDlizFareWaLpYroiLecWtulăui: A1.1-3 care au conVWD1W) dezvvoQltarea de modele combinate pentru simularea GH PLFURVWUXFWXUL S UROXOXL DFHVWRUD DVX2S) 6UWDX GULăXVOS XLQPVSXDOiFXGWLHX OSFXLkLHP ]SGR LHVOWHUFLW

UăVSXQVXOXL GLOHOFHWFUWLUFL F 3 S(L H ]܈RL SWLXUQRDHELOcLonWtinDuaWreHv QS HQ 2022). A1.3 Proiectare de microstructuri ceramice piezo-/piroelectrice, folosind modele teoretice, cu FOM vPEXQăcWonătin܊uaLreWvHQ ; au fo st vndeplinite DFWLYA1L.4W-5 ăde܊sLinteză܈L FDUDFWH PLFURVWUXFWXUDOă D SXOEHULORU SH ED]ă GH VROX܊

perovskit pHQWUX IRORVLUHD DFHV, iaWr dRinUpuDlb erFileDR EP܊DLaWuQUpXroLWduFHseH ce raImiHci URH poroase făUă 3E FX GLIHULWH WcLonStinXuaUre L20 22G). ÌHQ FFRDQGHLUFWXWi ăAOL1܊ Y.6L,DLs-FWWDLWYH a efectuat pURLHFWDUHD G܈HL GSLUVRSGRX]FLHWULHYDH H[SHULPHQWDOH SH

LPSOXVXULORU WHUPLFHta rea܈eLne rgiPei HdiFn DdiQferLiteFmHed ii;SAH1.Q7 PDQDJHPHQW ܈ LD GULHV]HXPOLW.QDWUHHORU RE܊LQXWH

WCoUorXdo narFe, ROH

DHVFULHUHD úWLLQĠLILFă úL WHKQLF

FX SXQHUHD vQ HYLGHQĠă D UH]XoObiWectDivWeloHr O- seRvUor inHdiWcaDSHL UH]XOWDWHOH úL PRGXO GH GLVHPLQDUH

A1.1 'H]YROWDUHD GH PRGHOH FRPELQDWH SHQWUX VLPX DFHVWRUD DVXSUD UăVSXQVXOXA1L.2 6SWLXHG]LRXHOO HLFPWSUDiLFGFWH X vOFQXk LP S HOHFWULF DVXSUD UăVSOXHQFVWXUOLXFL G3L H(O H F܈WLU LWFX Q DSELLHO]LRW D

(activitatea YD FRQWLQAX1.D3 P rovieQcta re de m icr os tru ct uri ceramice piezo-/piroelectrice, folosind PRGHOH WHRUHWLFH FitaXtea Y)D2 0F RvQPWELXQQXăDW ăv܊QL W H D F WLY

‡ Descrierea sistemelor ceramice dense prin simulari Monte-Carlo

Pentru a descrie prin simulăUL UROXO PLFURVWUXFWXULORU SRUR܈Di VH

IHURHOHFWULF vQ FHUDPLvnFtkiLm icrSosRtruUctRuriDceVraHmi ce foDlosXin d mIetRodVe MWo ntJe HQH

Carlo utilizkQG PRGHOXO 3RWWV $FHVWD D IRVW LQL܊LDO S

[1] SHQWUX GHVFULHUHD VWUXFWXULORU GH GRăPVHWQăLUL vGQH

posibile. 6LVWHPXO FRQVLGN xHNUsDpinWi a vkHndVHWamHilt onRian ulU: H܊HD GH

ܪൌെσߜௌ೔ௌೕ, (1)

unde ߜௌ೔ௌೕUHSUH]LQWă VLPEROXO OXܵL௜ൌ ܵ.௝)UVRDQXH F ܵN ௜H് UܵG௝) D[2܈]F. LLăa paLsuDl

YD

LQL܊LDO VH DWULEXLH YDORUL DOHDWRULL VSLQLORU WRWDO DO VLVWHPXOXL Vă V[F3] DXGWăL O L3]UDRWFăH GSXUUHDV XVSWXDQQHG D VSLQ ܈L DWQURLE XYLDUOHRDU LX Q H'LDFă DFHDVWă VFKLPEDUH G

VLVWHPXOXL PRGLIÌLn

FcazDcU

onHtrDar, scHhimVbWareHa estDe FtoFtu܈HLS WDFWFăH S WDWă

probabilitate mai mică SHQWUX D QX SHUPLWH Vi inLteVrmWedHiarPe)X. POrocXedLur a eVsteă VH UHSHWDWă ăUG HP DXUQH QGXHP RUL SkQă FkQG VH DWLQJH VW 7LPSXO vQN xFNDYUHHU LDIXL FOăRUFL DOH XVQWLăWUDLWLH DG HG HV SWLLQP SU HvSQU H

܈L VH 0Q&R6W H D0]RăQWH &DUOR 6WHS $FH[4@VW ܈LP RvGHQO F[D2] GUIXROV SHQWUX D JHQHUD PLFURVWUXFWXUL FHUDPLFH SROLF

microstructurăFHUDPLFă YLUWXDOăD JSUUDRQFXHOGHXOURDU GHHV WFHU HI܈L-WaQHDUOHL DWLQV GLPHQVLXQHD PHGLH GRULWă D JUDQXOHORU

/D SDVXO -a XutiUlizPatăteWoriRa ULa nd au-VGinzburg-Devonshire (LGD) [5] pentru a simula IRUPDUHD GRPHQLLORU IHURHOSHUFHWFUXLPF H܈ Lv QH YFRHOUXD܊PLLDF ăG

௬

ଵଵ ௫

௬

ଵଶ௫ ௬

ଵଵଵ௫

௬

ଵଵଶ௫ ௬

௬ ௫

HOHFWULF 3RODUL]D܊LD VSRQWDQă HVW-DHev onGshHireV: FULVă I

ଵଵ ௫

ܨ௅஽ൌߙ

൫ܲଶ൅ܲଶ൯൅ߚ ൫ܲସ൅ܲସ൯൅ߚ ܲଶܲଶ൅ߛ

൫ܲ଺൅ܲ଺൯൅ߛ

൫ܲସܲଶ൅ܲସܲଶ൯, (2)

XQGH Į ȕ Ȗ VXQW ܲ௫F܈RܲL௬Q UVHWSDUQHW]HL QGWHă PSDUWRHLUHLFD܊OL L OLHD UY HF D[HORU FULVWDORJUDILFH ÌQ ID]ܲDൌ Ͳ S DULDHUO HvFQW UFLHFDă HQHUJLD HVWH PܲL്QͲL DPOăH SSHRQOWDUUXL ]YD܊OLRHULL DYkQG RULHQW 3HQWUX D GHVFULH IRUPDUHD GRPHQLLORU IHURHOHF HQHUJLHL SHUH܊LORU GH GRPHQLL

ܨீ ൌ݃

൫ܲଶ ൅ܲଶ ൯൅݃ ܲ ܲ

൅݃ ሺܲ

൅ܲ ሻଶ+݃ǡሺܲ

െܲ ሻଶ, (3)

ଵଵ ௫ǡ௫

௬ǡ௬

ଵଶ௫ǡ௫ ௬ǡ௬

ସସ ௫ǡ௬

௬ǡ௫

ସସ ௫ǡ௬

௬ǡ௫

unde parametrii ݃VXQW FRQVWDQWH ܲG௜ǡ௝H U HPSDUWH]ULLQDWOă GLHDUiUDL YQSDRRWOD ܊UFLRD] ID܊ă GHj G3LUULHQF ܊XLUDP DUH HQHUJLD OLEHVUWăă DH WVDLSVăW HFPDX D GRXă FܨR௧௢Q௧Wൌ௔௟UσሺLܨ௅E஽൅Xܨ܊ீሻL, uLnd e ܨ௅஽܈ܨLீ VH HVWLPHD]ă SHQWUX ILH GLVFUHWL]DUH ÌQ FHUDPLFă RULHQWDUHD FHOXOHOR

URWD܊LHL GLQ LQWHULRUXO JUDQXOHORU ID90܊o. ăUn ghGiuHl d e VLV URWD܊LH DO FHOXOHORU HOHPHQWDUH D IRVW DVRFLD

Xxxxs.

3HQWUX D VLPXOD FUH܈W-DH USHRDU QGLRWP HGQHL LODR UR IFHRUQRIHLO RULHQWăUDLO HD OSHRDOWDRUULL]LD ܊LHL FHOXOHORU HOHPHQWDUH FHOXOHORU GH GLVFUHWL]DUH VH DMXVWHD]ă VXܨ௅F஽FHV SHQWUX ILHFDUH FHOXOă ܲ௫G܈HLܲ ௬ GQLXV FVUXHQWWL ]SDUURHL H F܊RLPLSORHQ

FRQVLGHUDWH FD UHIHULQ܊ă GHFkW SHQWUX JUDQX FHOHODOWH JUDQXOH DFHVWH FRPSRQHQWH VH FDOFXO

௫

௬

௬

௫

௬

ܲ௫ൌܲכ…‘ሺߙ•ሻ൅ܲכ•‹ሺߙሻ܈ܲL ൌെܲכ•‹ሺߙሻ൅ܲכ…‘ሺߙ•ሻ, (4)

unde ܲכ܈ܲLכ UHSUH]LQWă SURLHF܊LLOH3 HSQRWOUDXU LF]DDO܊FLXHOLX OS HG HDI

௫ ௬

FDUH VXQW desHcrVierHeaQră܊spLunDsuOluiHp iezvoelQec tric vQ IHUR-DH OHLFPWSUOLHFPLH QWVDW 0RQWH &DUOR ED]DWă SH WHRULD /*' JHQHUDOL]DWă

termeni:

ܨ௧௢௧ൌ௔௟σሺܨ௅஽൅ܨீ൅ܨ௘௟௘௖൅௧ܨ௥௘௟௔௦ሻǡ௧௜௖

(5)

Pentru descrierea efeFWHORU PHFDQLFH VH ܊LQH FRQW GH FXSO

ଵଶ௬

௬ǡ௬

ଵଵ௬

ଵଶ௫

௫ǡ௬

௬ǡ௫

ସସ௫ ௬

ଵଵ

௫ǡ௫

HODVWLFH ORFDOH SUHFXP úL HQHUJLkDx2 /2)H: ODVWLFă VSH

ଵଵ௫

ܨ௘௟௔௦ൌ௧௜െ௖ݑ௫ǡ௫൫ܳ

ܲଶ൅ܳ

ܲଶ൯െݑ

൫ܳ ܲଶ൅ܳ

ܲଶ൯െ൫ݑ

൅ݑ ൯ܳ

ܲܲ ൅ܥ ൫ݑଶ ൅

ݑଶ ൯Ȁʹ൅ܥ ݑ ݑ

൅ܥ ൫ݑ ൅ݑ

ଶ

, (6)

௬ǡ௬

ଵଶ௫ǡ௫ ௬ǡ௬

ସସ ௫ǡ௬

௬ǡ௫൯Ȁʹ

unde parametrii Q úLC UHSUH]LQWă FRQVWDQWH GH PDWHULDO F elastice). Variabilele ݑ௫ úLݑ௬ VXQW GHSOODHV ăDUOLHO HQ ROGRXFUDLORU GLQ UH܊ SR]L܊LLOH ORU FRUHVSXQ]ăWRܲD௫UൌHܲ௬ ൌXͲሻQ, iHar Lter meVniWi ݑă௫ǡ௫U, ݑL௫ǡ ௬, Qݑ௬Hǡ௫SRO úݑL௬ǡ ௬VXQW DOXQJLUL UHODWLYH DOH FHOXOHORU GH GLV GHIRUPDWă OLSVD SRODUL]D܊LHL VSRQWDQH

3HQWUX FDOFXOXO GHSODVăULORU ORFD-Oa Hdez vovltaQt o WRD

SURFHHGUXDUWăL YLăW 0RQWH &DUOR ED]DWă SH SULQFLSLXO

VXFFHVLY GHSODVăUL QRL DOH QRGXܨU௘௟L௔O௦. R௧Pe௜U௖b azaFpRroUcedHurVii SXQ GHVFULVH DQWHULRU DH QILRLVOWR UP RIQHLUWRHUOLH]FDWUăL FHHY Răr܈Oui LX ܊DLX

QRG GLQ UH܊HDXD GH GLVFUHWL]DUH SHQ, pWrinUmXin imDiz areHa YDO HQHUJLLORU HODVWLFH vQ XUPăWRDUHOH VLWXD܊LL

L GRPHQLL ÄDV JURZQ´ IRUPDWH LQL܊LDO vQ

LL vQ WLPSXO GHVFULHULL FXUEHL GH SULPă S

LLL vQ WLPSXO SDUFXUkJPHSUേXLܧO.L FLFOXULORU GH K

)LJ 6WUXFWXUD GH GRPHQLL LQLаLDOă ÄDV JU

Fig. 2 Structuri de GRPHQLL ЮL GHIRUPăUăLU LO R0FRDQOWH & DUUHO]RX OvWQD DOH SDUFXUJHULL XQXL FLFOX GH KLVWHUH]LV FRPSO

ЮL GHIRUPăULL UHODWLYH 6 ( FDOFXO

‡ Descrierea sistemelor ceramice cu porozitate

3URFHGXUD GHVFULVă DQWHULRU SHQWUX FHUDPLFL DYkQG SRUL L]RWURSL GH IRUPă VIHULFă VDX SRUL

SDUDOHHOU SFHkQWG L܈FLX OSDU SH D[D OXQJă D SRUL-aOgeRneUrat unSHQW VLVWHP FHUDPLF FX DFa7H8%H, Dda܈r cLu miGcroHstrQucVtuLri WdifDeriWte:H(i ) pUorHi izOotDropWi LdeYă G IRUPă VIHULFă -D OLXLQ J XSOR OUHFLFk WPDUSOLXFOQ XJLDL S܊OHLL FGDHW ܈L UHVSH OXQJă SHUSHGLFXODUă SH FkPSXO HOHFWULF DSOLFDW

ÌQ )LJ VXQW SUH]HQWDWH UH]XOWDWHOH VLPXO SHQWUX FHUDPLFL SRU(aR D V H SFRXU RD]FLHWHDDW܈HL USHROUDRW]LLYWăD W HvQ IRVW UHSUH]HQWDWH FRPSDUDWLY LPDJLQLOH SRODUL VLPXOHD]ă H[SHULPHQWXO GH PăVXUDWRUL SLH]RHOHF

(a) (b) (c)

Fig. 3 6WUXFWXUL GH GRPHQLL GHWHUPLQDWH OD VDWXUDа SRUR]LWDWH UHODWLYă vQ FD]XO vQ FDUH FRQILJX D[D OXQJă SDUDOHOă O X QFJ ă FSXH USSRHUQLG LDFOXOQDJULăа LS HF XG L

6H REVăHVUDYWăX UDF܊LD FRPSOHWă VH UHDOL]HD]ă vQ H܈DQWL±FRXQOXRODXULH D JDOEHQă DSURDSH SHVWH WRW SUDF cktevD ]RQH PLFL vQ -YDH FOLXQQDJWXDOW HGDL USHRFU܊LOHRLU F kGPHSXOXL FkQG FkPSXO HVWH DSOLFDW SDUDOHO FX D[D OXQJă GH DVHPHQHD GHIRUPODXULH D FUDHUOHD WVLHY ăR EDV HU܈YDăQ W܈LLR QvXQ ) GHWHUPLa Q D W ă G H6 LVWHPXO L]RWURS FX SRUL VIHULFL H[WLQVă vQVă H[LVWă FHYD PDL PXOW Hv QU HFJDL]XXQOL SFU

SRODUL]D܊LD WRWDOă YD IL PDLa P L F ă ܈'LD FGăH SDRVUHLPLH Q OXQJă SHUSHQGLFXODUă SH GLUHF܊LD FkPSXOXL DSOL

OD VDWX U D ܊FL H D)YLkJQG ]RQH H[WLQVH FX RULHQWăUL FD] SRODUL]D܊LD WRWDOă YD IL ܈a0L.5% . PDL PLFă ܈L G

Porous ceramics

r.d. 78%

Isotropic Parallel Perpendicular

0,8

0,6

Polarization (a.u.)

0,4

0,2

0,0

-0,2

-0,4

-0,6

-0,8

-15

-10 -5 0

5 10 15

0,25

Porous ceramics

Isotropic

Parallel

r.d. 78%

Perpendicular

Permittivity (a.u.)

0,20

0,15

0,10

0,05

0,00

-12 -9 -6 -3 0 3 6 9 12

Electric field (a.u.)

Electric field (a.u.)

)LJ &LFOXUL GH KLVHW H(U H ]FLDVO F3X O(D W HЮ LG LWQX QVDLEPLXOOL FHUDPLFL SRURDVH FX DFHHDЮL GHQVLWDWH SRU L]RWURSă E FX SSRRUULL DDOOXXQQJJLLааLL SSDHUUDSOHQOGLL F X OFD U

)LJ SUH]LQWă FLFOXUP(EL) O܈HL DHO HK LWVXHWQሺܧHDሻ,UEcaHLlc]uOlaLteVWdi năD܊OLHL VLPXOăUL 0RQWH &DUOR vQ FHOH WUHL FD]XUL 3RO SDUDOHOH E LDU FHOH PDL PLFL FRUHVSXQ-VGH FvRQQWI

DFHVWH GRXă GOHLVPFLUWHHV F ă3WHR DH]UሺܧRHሻ,Q tuDDna b ilGitaHteaS݊HሺܧQሻൌGHHሺͲQሻȀ܊HሺHܧሻLD UH DFHO WUHQG GH H[HPSOX SHQWUX XQ Fka P S H O HFRWQUILFaJ 0.X7G8UHD ܊ L

(Fig. 3a) ܈i respectiv a0.64 (Fig. 3c).

‡ Proiectare de microstructuri ceramice piezo-/piroelectrice, folosind modele teoretice, cu FOM vPEXQăWăаLWH 0RGHO )(0 аa'd e pSorHozQitaWte Ua pXer miDtiv ităGiаiHizWotrHopUe PLQD

ÌQWUXFkW DWkW vQ DSOLFD܊LLOH SLt U(FROMH)OesHteFinWveUrs LFH SURSRU܊LRQDOă FX SHUPLWLYLWDWHD PHGLXOXL VH L ULGLFDW UăVSXQVXO SLUR SLH]RHOHFWULF DO VLVWHP VLVWHP U$D܈WDă F܈XLP PDRGHOXO ' -DS UGHH]PHRQQWVDWU DWQ WDHQUWLHRUL

grupului [6@ QX GRDU FDQWLWDWHD GH SRUL FRQFHQWUD GHIRUPDUHD UHODWXLQYăDE L SOHLUWPDLWWHLDY L WFDLW ܈HLD G܈LV WULEX܊L FkPSXOXL DSOLFDW

$VWIHO vQ FDGUXO DFHVWXL RELHFWLY VH YRU

DGHFYDWă D SHUPăLnWu ILLYHL WăG܊HLWLU L PsuHGluQDi pWUiroD - OFSăDL UHUH]ă RVHSOXHQFWULF PD[LPL]H]H )20 vQ YHGHUHD DSOLFăULL DFHVWRUD

VLPXOăUL IROemReVntuLluQi fGini t (PFEHMW) [R7]GcDare vHor Opermite proiectarea de microstructuri favorabilH vQ VFRXXX XD[LPL]ăULL )20

ÌQ SULPD SDUWH D DFHVWXL RELHFWLY D IRVW G GHSHQGHQ܊D SHUPLWLYLWă܊LL vQ IXQF܊LH GH SRUR]L

electrice ale sistemului VXQW RE܊LQXWH SULQ UH]ROYDUHD HFXD܊LH

׏ήሺH׏MሻൌͲ, (7)

unde MHVWH SRWHQ܊LDOH XSOH UHPOLHWFLWYULLWFD WOHRDF DOOR F DLODăU D PHGLX a LDU vQ LQWHULRRUVXWO JSHRQUHLUODR܊UL DHOVHWDHW R U v3QR UVLV FRUHVSXQ]ăWRDUH FRQIL-JSXDUD܊OLHHOL G)HL J F RQ GDH Q V DSWHR UD O

GLIHUHQ܊ă GH SRWHQ܊LDO kmFpuRl QeleGctrLic܊esLteLo rienOtaDt p erpOenLdiPcuLlarWpDe 'L

HOHFWUR]L ܈L WDQJHQ܊LDO aO1DH XVPXDSQUQD I H ܊6HLOVHW HOPDXWOH UDD OI WHWUDHGULFH LDU SRWHQ܊LDOXO vQ LQWHULRUXO IL

corespunzăWRDUH QRGXULORU

Mሺݔǡݕǡݖሻൌ݌௘M௘൅݌௘M௘൅݌௘M௘ , (8)

ଵ ଵ ଶ ଶ

ଷ ଵଷ

vQ eFUDHUSHU H]LQWă QXPăUXO݌௘ VHXOQHWP HIQXWQXFO܊XLL OFMH௘RV QXGVQHLW G LHSQURWDWHWHU QS

௞ ௞

ORFDOH vQ FHOH SDWUX QR݇GൌXͳǡUʹǡL͵) D)ORHO RHVOLHQPGH QWSUXROXFLH GXF FDOFXOH DOJHEULFH PDWULFLDOH FX FRQGL܊LL OD OL GLQ UH܊HDXD GH GLVFUHWL]DUH &XQRVFkQG SRWHQ܊L

ܧԦൌെ݃ݎܽ ܸ݀

(9)

/D SDVXO XOWHULRU VH GHWHUPLQD HQHUJLD HOHFWU WXWXURU HOHPHQWHORU ܈L DFHDVWD VH FRQVLGHUă HJ

echivalent de volum ݒ௧ FăU-DX LDS OL FVDܧ௔W௣ ௣܈௟XLQ DFYkkPQSG SHUPHL௘௙W:௙LYLWDWHD

ܹ ൌଵσே Hܧଶݒ ൌ ଵܧଶ ݒ, (10)

௧௢௧௔௟ଶ ௞ୀଵ ௞ ௞ ௞ ଶ ௔௣௣௟௧

vQ NFHDVUWHH QXPăUXO WHR௞ǡWܧ௞DǡݒO௞ VGXHQ WH OSHPUHPQLWHL YLDWUD WHD ORFD

volumul elementului ݇considerat.

(a) (b)

(c) (d)

)LJ D 6LVWHPXO SRURV FRQVLGHUDW vQ VLPXO FkPSXO ORFDOV FUDHOSDU HG]HH QFWXDOWR UvLQ G 'HSHQGHQаD G

5H]XOWDWHOH FDOFXOHORU FX )(0 VXQW SUH]HQWD

F VXQW UHSUH]HQWDWH văGQH VSFRDWOHDQ ܊GOLHLD FODX WOGăHR U V LL9 V WDSHSHPQXWO

grosimea de 1mm.

3HQWUX D GHWHUPLQDi HGIHSFHWQLGYHHQ ܊FDD SIHXUQPFL܊WLHY LGWHă ܊ XUPăWRULL SD܈L DX IRVW JHQHUDWH PLFURVWUXFWXU

fiecare caz, s-D XUPDW SURFHGXUD GHVFULVă DQWHU-aLdReteUrm in at $VW SHUPLWLYLWDWHD HIHFWLYă ܈L D IRVW UHSUH]HQWDWă

Rezultat DO D܊Fii WAIL.1 YestLe WGăH]YROWDUHD GH PRGHOH FDRpPenEtruLQDW

a monitoriza HYROX܊eLniiDlor feGroRelPectrice ܈i estimarea GHSODorVfiăecUăruLi Onod dintr-o UH܊HD

discretizaWăpentru a evalua la fiecare pas deformarea unui sistem feroelectric dens, vQ PDL PX VLWXvDQ܊ LDLE V WHQ܊D FkPS, XvOQX LW LHPOSHXFOW UGLHFV FHU[LWHHUULQL ܈FLvXQU EH

timpul parcurgerii ciclurilor de histerezis sub ckPSXേ۳O. 3 URFHGXUD GH]YROWsDe Wă

a fRVW IRORVLWă ܈L SHQWUXi te aFleHpUoriDlorP(iLzoFtroLpi - VSIRHUURaDLniVFzoHLtro pi F܈±XL I DOXQ), JiarLr܊ezLultatele reprezentate comparativ au arăWDWS RFOăD UL]D܊LD ܈L GHIR

UăVSXQVXO vSQL H]PRDHWcOHerHaUmFLicWeDUpOoLrHoFa s e d epind de forma porixxx ܈L GH GLUH

ckPSXOXL apHlicOatH. UFn WaltUreLzuFlta t DO DFOWRLUY LWQăW܊ULHSULQfoVloHsin dDV LIPRXVOWă UFL

0RQWH &DUOR DX IRVW FDOFXOPD(EW) H S܈ULH FUXHPS U܈HL]H ሺ۳HሻWQvXWQQD DWEH

materiale poroase cu diferite forme ale porilor -܈DL DVUăWDW LPSDFWla XdifOeri teFvaklorPi SXO ale acestuia (AI.2). ÌQ FRQWenLtruQpXroDiecUtaHrea d e mSicrostructuri ceramice piezo-/piroelectrice s-a

utilizat modelul FEM 3D, iar rezultatul RE܊LdinQFXDWOFXVOLHPOrXHileO dăe܈mLicrostructuri realistice

DX DUFă DRW SRUR]LWDWH UHODWLYă D FHUDPLFLL GH FHUDPLFLL GHQVH OD LDU SHQWUX R SRUR]LWDW

ID܊ă GH FHD FRUHVS.X(AQI.]3 văa cWonRtinDuaUvHQ P D. W H U LDOXOXL G Rezultatele RE܊LQvXQW HFDGUXO , sDtudFiuHl HVIWHFLW XHOWXDLSas HuSSURDU RS]ULRWSăU܊L

IXQF܊aLleRmQateDriaOlelHor ceramice de BaTiO3 au IăFXW VunXeiEluLcrHăFUWLX O܈ WLLQ܊LvnILFH

JOURNAL OF ALLOYS AND COMPOUNDS ܈L GLVHacPesLtorQa DvUQH DF Da G U XFOR QIHUL

LQWHUQ.DÌ܊QL RHQWDUDOPSHăHWOaRcHeDs teUXstHud ii vor continua, iar rezultatele teoretice vor fi comparate cu

datele experimentale RE܊LQXWH SH FHUDPoiLecFtulLui. SURGXVH vQ FDGUXO