Chế tạo và nghiên cứu các tính chất của một số màng áp điện

DAI HOC QUOC GIA HA NOI DETAI CHE TAO VA NGHIEN ClTU CAC TINH CHAT CUA MOT s o MANG AP DIEN Ma so: QC.08.09 Chii nhiem de tai: TS Pham Due Th^ng DAI HOC QUOC GIA HA N I Tf?UNGTAM THONG TIN THU VIEN 0O06Q0OOGZ3 Ha Ngi, nam 2010 MUC LUC Trang Bang giai thich cac chir viet tat Danh sach nhung ngu-oi tham gia thyc hien de tai Danh muc cac bang so lieu Danh muc cac hinh Tom tdt nhu-ng ket qua nghien cuu chinh cua de tai Bao cao tong ket 6.1 Dat van de 6.2 Tong quan cac van de nghien cuu 6.2.1 Hieu ung ap dien va vat lieu cau true perovskite 6.2.2 Tinh chat dien va sat dien cua BaTiOs 6.2.3 Mot so I'rng dung 6.3 Muc tieu va noi dung nghien cuu cua de tai Phan I CAC PHLTONG PHAP CHE TAO MAU 10 1.1 Bot BaTi03 kich thuoc nanomet 10 1.2 Vat lieu BaTiOs dang kh6i 10 1.3 Mang vat lieu BaTiOs 10 PHAN II CAC PHU'ONG PHAP KHAO SAT CAC TINH CHAT PHAN III KET QUA NGHIEN ClTU 12 14 III He BaTi03 dang hot va kh6i 14 III.2 Vat lieu BaTi03 dang mang 22 III.3 Mo hinh hoa mot so tinh chat cua vat lieu cau true ABO3 25 III.4 He bang tu Finemet 25 KET LUAN CHUNG 26 6.4 Dia diem, thoi gian va phuo"ng phap nghien cuu 27 6.5 Ket qua nghien cuu 27 6.6 Thao luan 28 6.7 Ket luan va kien nghi 29 6.8 Tai lieu tham khao 29 Phuluc 30 BANG GIAI THICK CAC CUlf VIET TAT 1.1 Thiet bi, phucng phap thuc nghiem XRD X-ray diffractometer SEM Scanning electron microscopy BTO Barium titanate BaTi03 DRAM Dynamic random access memory FeRAM Ferroelectric random access memory NVRAM Non-volatile random access memory MLC Multilayer ceramic capacitor MEMS Micro electromechanical systems 1.2 Cac ki hieu khac e Goc nhieu xa tia X (°) V Dien the ngoai (V) p Do phan circ dien (|iC/cm^) Pr Do phan cue dien du (|j.C/cm^) Tc Nhiet Curie cua chat sat dien CC) ^ pu Nhiet dp phan ung Ipu Thai gian phan ung UAJ>H SACH iMiUiNO i>Gl/6fI THAM GIA THUC HIEN DE TAI (hoc ham, hoc vi, ca quan cong tac) - Chu nhiem: Pham Due Thang, Tien sy Khoa Vat ly ky thuat va Cong nghe nano, truong Dai hoc Cong nghe, Dai hoc Quoc gia HaNpi TT Nhung nguai thuc hien: Ho va ten Hoc vi Co* quan cong tac GS TS Dai hpc Quoc gia Ha Npi Nguyen Huu Due Do Thi Huong Giang TS DH Cong nghe, DHQGHN Tran Mau Danh TS DHCN - DHQG HN Nguyen Thang Long TS DHCN - DHQG HN Bui Dinh Tu ThS DHCN - DHQG HN Nguyen Hu"u Tuan CN DHCN - DHQG HN DANH MUC CAC BANG SO LIEU Bang I Sir phu thupc cua ciu true va hang so mang tinh the cua BTO vao thai gian tpu Bang Sir phu thupc cua cau true va hang so mang tinh the cua BTO vao nhiet dp Tp^ DANH MUC CAC HINH Hinh Hieu ung ap dien dual tac dung cua ung suat ngoai Hinh dan vj ciia cau true tinh the perovskite BaTtOs Hinh Sir phu thupc cua cau true tinh the cua vat lieu BaTi03 vao nhiet dp Hinh So nguyen ly cua phuang phap "bar-coating" Hinh Thiit bi XRD D8 Advance Bruker AXS Hinh Th\k bi LCR PM3550 Tegam Hinh Thiet bi Radiant Precision LCIO Hinh Gian nhieu xa tia X cua mau bpt BTO theo tpj khac Hinh Anh SEM cac mau BTO dupe tong hgp theo thai gian tp^f khac Hinh 10 Su phu thupe kich thuac hat BTO theo thai gian tpLjkhac Hinh 11 Sir phu thupc cua hang so dien moi vao thai gian tpijkhac Hinh 12 Duong cong dien tre cua mau BTO che tao aTpu = 150 "^C Hinh 13 Dong theo thai gian cua BTO vai tpij=7 gia, TpLr= 150°C (a) va tp^^^lO gia,Tp,= 150°C(b) Hinh 14 Gian nhieu xa tia X cua mau bpt BTO theo nhiet dp Tpu khac Hinh 15 Anh SEM cac mau BTO dupe tong hgp theo nhiet dp Tpu khac Hinh 16 Su phu thupe kich thuac hat BTO theo nhiet dp Tpu khac Hinh 17 Sir phu thupe cua hang so dien moi vao nhiet dp Tpu khac Hinh 18 Duong cong dien tre ciia mau BTO che tao trongtpu = gia Hinh 19 Anh cac mau mang BTO-epoxy vai eae ham lugng khac Hinh 20 Gian 66 nhieu xa tia X cua cac mang BTO-epoxy vai cac ham lugng khac Hinh 21 Anh SEM cua mang BTO-epoxy vai 10% BTO Hinh 22 Hang so dien moi cua cac mang BaTiOs-epoxy vai cac ham lupng khac Hinh 23 Anh SEM cua bang tir Finemet RESEARCH SUMMARY 5.1 Research results a Main results: - Study on the fabrication process of BaTiOs nano-sized particles, bulk and film by using hydrothermal and bar-coating methods, respectively - Investigation of the effects of reaction temperature and time, and concentration on crystallographic structure, microstructure and electrical properties of the synthesized materials - Study on some properties of Finemet ribbon b Publications: - Pham Due Thang Ho Thi Anh Hat nano sat dien BaFiOj: che tao \ a nghien cuu mot so tinh chat dac tru'ng, Tuyen tap Hoi nghi Vat ly chat ran va Khoa hoc \at lieu toan quoc Ian thu Da Nang 8-10/11/2009 - Pham Due Thang, Nguyen Ba Doan, Mo phong mot so tinli chat cua \at lieu multiferroic BiMnOs bang phuang phap gan dung truang trung binli Tuyen tap Hoi nghj Vat ly chat ran va Khoa hoc vat lieu toan quoc Ian thu Da Nang 8-10/11/2009 - Pham Due Thang, Hoang Hai Duong and Nguyen Hoang Nghi Magnetic and sensitive magneloelastic properties of Finemet nanostructured ribbon Journal of Physics: Conference Series 187 (2009) 012062 5.2 Technological products/practical application 5,3i, Training a Number of undergraduate students involved in the project: 02 b Number of postgraduate students in\"ol\ed in the project: 01, c Number *.")f graduate theses: 02 - r' graduate thesis: Stud}' on fabrication of peroxskiie ferroelecinc powders Siudeni name: Ho Thi Anh Baich: QHO005-I CQ-V M:i|t't" ilcid rninor fieki; Engineering [ih;'^ics Nanotcchnol'>u\ - 2' ' uraduaie lliesis- Modehng bL)nie pr.'pcrue.-> of nuiliilcrruu: BlMn(J-, Student name: Nguyen Ba Doan Batch: QH-2005-I/CQ-V Major field/minor field: Engineering physies/Nanotechnology 5.4 Capacity strengthening - Improvements of scientific research and knowledges on fabrication of piezoelectric-ferroelectric powders, bulk and film for the members of the research group - Improvements of academic degrees for some members participated in the project BAO CAO TONG KET 6.1 Dat van de (Neu ro tinh cap thiet cua de tai hoae cac npi dung nghien cuu cua de tai) Trong so cac vat lieu ap dien-sat dien, Barium titanate BaTi03 la vat lieu c6 hang so dien moi Ian, c6 the dao dong tu 1000 den 2000 a nhiet dp 25°C va c6 the len den gia tri 10 a gan nhiet dp Curie (nhiet dp Curie cua BaTi03 la Tc = I20°C) BaTi03 da va dang dugc cac nha khoa hoc tren the giai quan tam nghien cuu kha nang co the ung dung cac nganh cong nghiep dien va dien tu Mot so ung dung dang ehu y cua vat lieu BaTi03 nhu dung lam tu dien cho bp nha may tinh NVRAM, DRAM va sau la FeRAM, che tao tu dien gom da lap MLC, [1 va cac tai lieu trich dan] Hat BaTiOs a kich ca nanomet co the dugc phan tan nen polymer de che tao cac cam bien nhiet hoae Nghien cuu che tao cac vat lieu ap dien-sat dien cau true miero-nano noi ehung cung nhu BaTi03 noi rieng luon la mot van de ly thu Tuy nhien hien tai Viet Nam cac nghien cuu ve vat lieu thuang chi tap trung a cac vat lieu dang khoi va gan day la dang bpt Co nhieu phuang phap de tong hgp BaTi03: doi vai vat lieu a dang khoi va bpt co the ke den cac phuang phap nhu phan ung pha ran, sol-gel, thuy phan nhiet, dong ket tua, [2-5] Tuy phuang phap phan ung pha ran de thuc hien nhung co nhuge diem la kich thuac hat khong dong deu, Ian ban micromet va thuong chua nhieu tap chat nhu cacbonat, silieat Cac tap chat khong mong muon se lam giam cac tinh chat vat ly va dp ben cua vat lieu Trong so cac phuang phap boa hpc, phuang phap thuy phan nhiet co nhieu iru diem nha vao kha nang de kiem soat phan vat lieu qua viee thay doi ty le ban dau Ba:Ti, san pham bot c6 dp dong nhat ve ca phan va cau true, cac hat BaTi03 thu dugc c6 kich thuac nho ban micromet Doi vai vat lieu dang mang, cac phuang phap Vat ly thuang chiem uu the, vi du boc bay bang laser xung, phun xa, LTU diem cua eae ky thuat la cho phep tao dugc eae mang mong vai dp day tir vai ehue den vai tram nm cung nhu cho phep tao cac mang to hgp dang nhieu lap Nhung nhuge diem la cac trang thiet bi sir dung ciang nhu chi phi van hanh nhin chung kha ton kem Doi vai cac truang hgp tao mang day ca vai ehue den 100 j^m, phuang phap "bar-coating" thuang dugc su dung thiet bi dan gian va de van hanh Tuy nhien mot diem can luu y la vat lieu ban dau sir dung phuang phap phai co phan phu hgp nhu phan danh dinh cua mang can che tao 6.2 Tong quan cac van de nghien cuu (Can trinh bay nhu mot bao cao khoa hpc, neu bat nhung van de da nghien cuu, nhiing phuang phap da ap dung cho cac nghien cuu truac, chi ro de tai quan tam nghien cuu va giai quyet nhung van de gi, nham dong gop gi) 6.2.1 Hieu irng ap dien va vat lieu cau true perovskite Hieu ung ap dien (piezoelectric effect) dugc phat hien vao nam 1880 bai Jacques va Pierre Curie, la hien tugng mot vat lieu chiu tac dung cua ung suat keo hoae nen se xuat hien sir phan cue dien cam ung (xem hinh I) Nguge lai, vat lieu CO the bi bien dang dai hoae ngan lai dat dien truang ngoai thupc vao chieu giiia dien truang ngoai va veeta phan cue dien cua vat lieu Trong hien tugng nay, tren hai mat doi dien cua vat lieu se xuat hien mot hieu dien the ti le vai ung suat tac dung vao [1]: U~g33.a (1) vai g33 la he so ap dien (piezoelectric coefficient) dac trung cho timg vat lieu va cr la ung suat tac dung (cr> neu la ung suat keo, a < neu la ung suat nen) Nen (a) (b) Ci;4j& (c) Hinh LHieu I'mg dp dien dual tac dung cua img suat ngoai Hieu ung ap dien dugc quan sat thay tren nhieu vat lieu tinh the nhu thach anh, NaKC4H406 (potassium sodium tartrate), cac muoi Rochelle, Tuy nhien hieu ung tren cac vat lieu nhin ehung la nho Vai eae vat lieu gom co cau true tinh the perovskite thi hieu ung ap dien Ian ban nhieu Nha dac tinh nen cac vat lieu g5m ap dien da dugc nghien cuu manh me va dua vao ung diing rpng rai nhi8u ITnh virc nhu cong nghe dien va dien tu (mang rung, tu dien, cam bien, ) Perovskite la ten gpi chung cua cac vat lieu gom co cau true tinh the giong canxi titanate CaTiOs Cong thuc phan tu chung cua eae hgp chat perovskite la ABO3 vai A va B la cac ion duang (cation) co ban kinh khac vi tri cua ion Oxy (anion), co the la mot so nguyen to khac, nhung bien nhat van la oxy (xem hinh cho BaTi03) Tuy theo loai nguyen to a vi tri B ma eo the phan nhieu ho khac nhau, vi du nhu ho manganite, hp eobaltite, o^ Ba O 02- Hinh O dan vi cua cau true tinh the perovskite BaTiOj 6.2.2 Tinh chat dien va sat dien cua BaTiOj Tinh the cau true perovskite chi ton tai a trang thai ly tucmg mot so dieu kien nhat dinh Trong tu nhien, tai dieu kien binh thuang, cac tinh the gom perovskite co the co sir xe dich ve mat cau true, khien ca sa eua no khong eon thupe he mang lap phuang niia Vi du vai BaTi03 ban kinh cua cation A nho, khong lap day kich thuac giiia cac khoi mat lap bai anion O, dan den cation A khong CO dugc lien ket ben vung vai 12 anion O Trong truang hgp nay, mang tinh the se bi keo dan theo mot phuang de cation A co the lien ket vung vai cac anion O Cu the, ca so se bien dang tu hinh lap phucmg tu giae, ti so c/a thay doi (e = 0.403 nm, a = 0.398 nm) Ngoai ra, khoi tam mat lap bai anion O cQng bi xe dich xuong khoang 0.009 nm so vai cac mat cua hinh hop tir giae, cation B nam khoi mat tren bi xe dich len, tao nen su phan bo bat doi xung giua tam cua he anion va tam cua he cation Chinh dieu dan den dp phan cue tu phat cua tinh the BaTi03 Mot dac diem ly thu khac cua BaTi03 la cau true tinh the cua no phu thupe rat manh vao nhiet dp, dan tai viee mot so tinh chat nhu dp phan cue tu phat, hang so dien moi, ciang phu thupe rat manh vao nhiet dp Cu the, tinh the BaTi03 co the CO cau true thupe he mang khac thupe vao nhiet dp Tren nhiet dp Tc, BaTiOj CO cau true lap phuang dac trung bai nhom doi xung Pm3m (a = 0,402 nm) Trong khoang tu 130*^0 den 0°C, BaTi03 co cau true tu giae vai nhom doi xung P4mm va ti so c/a > Khi cac ion O^" va Ti'*'^ bi xe dich len va xuong doc theo true e ciia tinh the dan den sir hinh dp phan cue tu phat theo huang [001] Tu O^C den -90^C, BaTi03 co cau true true giao thupc va dp phan cue tu phat dugc hinh theo huang [110] Dual -90*^0, BaTi03 co cau true hinh thoi vai dp phan cue tu phat dugc hinh theo huang [111] (xem hinh 3) DAI HOC QUOC GIA H.A NOi TRrONG DAI HOC CONG NGHE DE CL'ONG DE TAI NGHIEN CL^ KHOA HOC DO TRUONG QUAN LV CAP DAI HOC QUOC GL\ HA NQI NAM 2008 iDe nghi chuan hi fhco Jim^ man qui dinh n\'-i lUtn r: fuim Ten de tai Tieng Viet: Che lao va nghien cuu C2c tinh chat cua mot so man^z ap Jien Tieng Anh: Fabrication and stud\ on properties of piezoelectnc tlln:s Thai sian thirc hien: 12thano (iirOl Oc 2008 din 31 0: ZOU^t De tai thuoc ITnh \\rc uu tien De tai c6 trung \6i mot de tai da hoae dang tien hanh khong; khon^ Chii tri de tai - Ho vd len: Pham Due Thang - \dm sinh: 19/3 - Chiiven mon dao (go: Vat \\ - Hoc hdm hoc vj: Tien s\ - Chuc vu: Giang vien Xani \'u D - Dan vi cong (dc iKhoa Truno tdm) Bp mon Vat lieu va Linh kien tu tinh nano Khoa Vat 1\ Ky thuat \ a Cong nghe nano - Dia chi lien he: Bg mon Vat lieu va Linh kien tu tinh nano Khoa Vat ly K> thuat va Cong nghe nano Truanu Dai hoc Cong nghe Dai hpc Quoc gia Ha Npi Nha E3 14 Xuan Thuy Cau Gia\ Ha Noi S6 dien thoai: 7549332 Fax: 7547460 - T)m id! boat dong nghien ciru cua CJm tri Je fdi: (Cac chu-ong trinh de tai NCKH da tham gia cac cong trinh khoa hoc da cong bl gin dav lien quan toi phiroTHJ huo'ne cua dl tai l Thoi gian ; Ten dl tai 1998-2003 I Cac vat lieu tu tien tien dung [ lam nam cham nha khoa 2003-2000 Linh kien nano dtra tren cac Tu- each tham gia Tham gia thuc hien de tai Cip quan Iv : Qu\ cong nghe cua Ha Lan ' (STW) Tham gia thuc To chuc nghien cuu khoa hien de tai hoc cua Ha Lan iNWO' Che tao \a nghien cuii cac tin;: Tham gia thuc 86 Khoa hoc \a Cone \^•dh : chat cua \at lieu tu co cau true hien de tai vat lieu to hop nhan tao 2004-2005 nano 2004-2006 Tich hop cac mang mong ac Tham gia thuc Cac chuong tnnh hop nhat dien cac he thong \ i co hien de tai lan thu sau cua L > ban dien tu chau Au (FP6^ 2007-2008 • Hieu ung dien-tu mot so Chu tri vat lieu tu giao - ap dien I Thai gian 2006 De tai cdp DHQC HN ; truo'ne DHCN quan 1\ Ten cong trinh Tu- each tham gia Nci cong bo Stress induced magnetic anisotrop; of Tac gia Journal of CoFe:04 thin films using pulsed laser Magnetism and deposition j 2005 ' Spinel cobalt ferntes b} j complexometric synthesis, I i 2004 Magnetic Vlateriais Tac gia I Magnetism and I Magnetism and magnetoresistance of ! pol\cr\stalline composite of i (ZnFe)304 and a-Fe:0: Journal of • Magnetic Materials Dong tac gia Journal of Applied \ j I I Ph\sics Co- quan phoi hap va cac cong tac vien chinh cua d^ tai TT Co' quan phoi hgp Bp mon Vi codien tu \a Vi he thong, Khoa Cong nghe Dien lu - Vien thong, truo'ng Dai hpc Cong nghe DHQG HN, ") Khoa Hoa hpc va Trung tam Khoa hoc \ at lieu, truong Dai hoc Khoa hoc Tu nhien DHQG HN -1 Vien Quoc te Dao tao \e Khoa hoc Vat lieu iITlMS) truong DH Bach khoa Ha No: Cac cong tac vien chinh TT Ho va ten Hoc \ i Ch uyen nganh Co quan cons tac GS TS \'at Iv DHCN - DHQG HN Nguven Huu Due n Do Thi Huong Giang TS \ a t Iv DHCN -DHQG HN -1 Tran Mau Danh TS Vat Iv DHCN - DHQG HN Nguven Thang Long TS \'at 1} DHCN - DHQG HN NCS \ a t lieu va linh kien ,ui Dmh Tu DHCN - DHQG r tu tinh nano Nizuven Huu Tuan LN \'at 1\ chat ran DHCN ~ DHQG H" Muc tieu Tron^ tho'i ^ian ^an da\ su xuat hien cua cac vat Iteu tu - dien imultiferroics) da tao mot trao luu mai viee nghien cuu cac vat lieu da chiic nang Trong cac vat lieu loai nav su phan cue dien co the xuat hien duoi tac dung cua tu truong ngoai va qua trinh tu hoa co the dien nho mot dien truong gav bai dong dien Hien ttrong nav mo each tiep can moi cho cac unu duno cua vat lieu tu cac ITnh vuc nhu cam bien kich co micro, luu irQ- thong tin va cac bp chuyen doi cac momen tu se duac dieu khien bang dong dien (chi can it nanu \uvn^) tha\ vi bang tu truong cao (tieu hao nhieu nang luong), Ve phan cdu tao vat lieu tu - dien thuang la to hop cua hai pha mot pha co lu tinh (vat lieu tu giao .) va pha lai co tinh chdt sat dien (vai lieu ap dien) Cho den nav phan Ion cac vat lieu to hgp nav dupe cht^ tao duai dang composit dang khoi (dung phuang phap n6n^2 thang o'^ nam 2008 Phe duvet cua truane DHCN ' TRUONG ?HC NO DAO TAC SAU TA! MCC V A \"CK' ifPm "PGS.TS •^A'';^M4'" - duac tai tro mot phan tu de ta: mang ma so; QC.08.0^N Dai hoc Quoc gia Ha Noi" Doi vai luan van (khoa luan i; ""Luan van (kJu'^a luan ) nav duo'c thuc hien khuon kho de tai mang ma so; QC.08,09 Dai hoc Quoc gia Ha Noi Doi vai bai bao bao cao dang o tap chi ky \-eu hoi nghi quoc te itieng Anh); ""This work is (parly) supponed by the research project No QCOS.OO granted by X'letnam National Univ-ersity Hanoi" Dieu 6: Hai ben cam ket thuc hien dung cac dieu khoan da ghi hap dong Trong qua trini^ thuc hien hgp dong hai ben co traeh nhiem, thong bao kip thai cho nliung van de vuang mac va eiing ban bae tich cue timi bien phap giai qu\'et Hgp done tu dong dugc lv' sau eo bien ban hpp hpi dong khoa hpc danh gia nghiem thu de tai voi ket qua dap ung cac qui dinh hien haiih Dieu 7: Hgp dong lam 05 ban moi ben giu 01 ban 02 ban gui cho phong T\"-KT 01 ban luu tai phong TC-HC ^^-^MTDTE^ BEN A '/i^iM^' PGS TS Nguyen Ngoc Binh DAI DIEN BEN B TS Pham Due Thang HI NGHiA VIETNAM i^yt lajj - 111 Jo - Hanh phuc D ^ DENGHl HAY DOI TRONG QL A TiU.NH TI lU'C HIEN DE TAI KHCN 1 en de tai: Che tao \ a nghien cuu cac i:nh ciiat eua mot so mang ap dien,' 2, Ma so de tai: QC.08.GO Jv Clui nhiem de ta:: lo va ton: P':am Due IT,: ;^ i L v V: hyv ;\;iii 1^ DOT V: cone :ac; Khoa \ a i iv k; t;u:^.t \ i Cong nghe na::v'' (.\' ^iua;: ^'liu v:\ Truxmg Dai h G.;.;!^ ighc DIK^H.iIIN ' '- '^'i-^- -•-•]• ^i' • V ngi di:ng nghio:: , i: ho^.- tc:: de tai r.'r.v: -j.r.' 0., [)e nghi tPiav d^.; vo lien ihoi giar .ehicn uu nhu sat; hd} dui thai gian nghien cuu ihuc h ; dc lu: den truac neav JO' (^o 2iJi' ", Do nghi thav dCi vc du loan kinh phi i" :U -.,L Nhirng ce nghi thay doi khac: ^) Cac can cu !> de nghi thay doi: !)'> nioi >o thiei ni che tao \at lieu duno cho nuhien ciru de tai nhir h-j T.'.- ni hoc hav bang la.-e dugc trien khai lap dot va dua vao ^u dung ir.ugn nen tie:; d\ ±i hicn de tai bi ann hirang Ngay^/A thang -! nam t —j N'gay/:.^ thang i nam ^.N'j Ngav //• tha::^ n Co quan chu quan duvet Co ouan chu tri Chu nhiem de tai [ kv I; i I GIA.M DOC "' (.ky len done dau)^ 1),\I IKX QIJJC GIA HA NOI **''" '" Kf FRLONG BAN KHCN ifP^-C n\c'j T"^':*^*^-^ FG3 J S l ] r y : ^ p = ^ > ^ S < > / ^ i ' h a m Due Thang T O M T A T CAC K £ T QUA NGHIEN ClTU C H I N H C U A D E TAI - Ket qua ve khoa hoc (nhirng dong gop cua d^ tai, cac cong trinh khoa hpc da cong bo) a Nhiang dong gop cua dh tai: - Nghien cuu quy trinh cong nghe chi tao vat lieu BaTiOs dang bot kich thuac nano, dang khoi va dang mang su dung cac phuang phap Hoa hpc (thuy phan nhiet) va Vat ly ("bar-coating") - Nghien cuu anh huang eua mot so diku kien cong nghe nhu nhiet do, thai gian phan ung va nong dp len c£u true tinh th^, cdu true vi mo va cac tinh chat cua cac vat lieu ch6 tao - Nghien cuu mot so tinh chat cua bang tu Finemet du dinh dung lam d§ quy trinh tao mang BaTi03 b Cong trinh khoa hgc da cong b6: - Pham Due Thang, H6 Thi Anh, Hat nano sat dien BaTiOs: ch§ tao va nghien cuu mot so tinh chat dac trung, Tuyln tap Hpi nghi Vat ly chat rin va Khoa hgc vat lieu toan qu6e l^n thu 6, DaNSng 8-10/11/2009 - Pham Due Thang, Nguyen Ba Doan, Mo phong mot s6 tinh chit cua vat lieu multiferroic BiMnOj bang phuang phap gdn dung truang trung binh, Tuyen tap Hoi nghi Vat ly chat ran va Khoa hgc vat lieu toan quoc lan thu 6, Da Nang 8-10/11/2009 - Pham Due Thang, Hoang Hai Duong and Nguyen Hoang Nghi, Magnetic and sensitive magnetoelastie properties of Finemet nanostructured ribbon, Journal of Physics: Conference Series 187 (2009) 012062 Ket qua phuc vu thyc te (eae san pham cong nghe, kha nang ap dung thuc te) Ket qua dao tao (s6 lugng sinh vien, s6 lugng hpc vien cao hpc, nghien cuu sinh tham gia thuc hien lam viec de tai, s6 khoa luan, luan van da hoan va bao ve) a So lugng sinh vien tham gia thuc hien de tai: 02 b So lugng hpc vien cao hoc tham gia thuc hien de tai: 01 c So Ichoa luan tot nghiep: 02 (eir nhan nganh Vat ly ky thuat) - Ten KLTN: Nghien cuu eh6 tao hat sk dien cau true perovskite Sinh vien: Ho Thi Anh Khoa: QH-2005-I/CQ-V Ngdnh: Vat ly ky thuat - Ten KLTN: Mo hinh hoa mot s6 tinh chit cua vat lieu muUiferroics BiMnOs Sinh vien: Nguyin Ba Doan Khoa: QH-2005-I/CQ-V Ngdnh: Vat ly ky thuat Ket qua nang cao tiem lye khoa hoc (nang cao trinh dp can bp va trang thi§t bi hoae phan mem da xay dung dugc giao nop dua vao su dung tai dan vi) - Nang cao cac hieu biet ve cong nghe che tao vat lieu ap dien - sat dien dang hat, khoi va mano - Gop phan dao tao nguon nhan luc chat lugng cao ve cong nghe miero-nano 32 1'niii.LJDANGKY KET QUA NGHIEN ClTU CAC DE TAI KHCN Ten de tai: Che tao va nghien cuu cac tinh ch4t cua mot so mang ap dien (Fabrication and study on properties of piezoelectric films) Ma s6: QC.08.09 Ca quan quan ly de tai: Dai hgc Quoc gia Ha Ngi Dja chi: 144 Xuan Thuy, C4u Gi^y, Ha Ngi Dien thoai: Co' quan chu tri de tai: Truang DH Cong nghe, Dai hgc Quoe gia Ha Npi Tong chi phi thyc chi: 28.000.000 (Hai muai tam trieu dong) Trong do: Tu ngan sach nha nuae 100 % Tho'i gian nghien cuu: Thai gian hk d§u: 06/2008 Thai gian ket thue: 03/2010 Ten cac can bg phoi ho*p nghien ciiu: - Chu tri de tai: TS Pham Dijc Thang - Nhiing nguai tham gia: GS TS Nguyin Huu Due TS Do Thi Huong Giang TS Tran Mau Danh TS Nguyin Thang Long ThS Bui Dinh Tu CN Nguyin Huu Tuan So dang ki de tai: S5 ehung nhan dang ki KQNC Bao mat: Ngay Ngay Pho bien rgng rai 33 To "1 tat ket qua nghien ciiu Cac ket qua chinh thu dugc de tai gom eo: - Nghien cuu quy trinh cong nghe che tao vat lieu BaTiOa dang bpt kich thuac nano dang Idioi va dang mang su dung cac phuang phap Hoa hoe (thuy phan nhiet) va Vat ly ("bar-coating") - Nghien cuu anh huang ciia mot so dieu kien cong nghe nhu nhiet dp thai gian phan ung va nong dp len cau true tinh the, cau true \ i mo \ a eae tinh chat cua eae vat lieu che tao - Nghien eiiu mot so tinh chat eiia bang tir Finemet du dinh diing lam de quy trinh tao mang BaTi03 San pham eiia de tai: - 01 bai bao dang tren tap chi chuyen nganli quoe te - 02 bai bao dang tren ky >-eu cua Hpi nghi \'at ly chat ran toan quoe - 02 khoa luan tot nghiep dai hpc Kien nghj \ e quy mo va doi tuong ap dung ket qua nghien cuu: Chii'c \ u Chii nlaiem de tai Thii truang ea Chii tich hpi Thu truonu co quan chii tri de dong danh gia quari ciuan Iv tai Ho va ten Pham Due Than: Hoc V i TS /LHIEU TRUONG iM&t\ PH6:m«i?NG BAN wm^(a PHONG KHOA HOC CONG fpfE; V A l f d P TAC QUOC T | - Kv ten \ c Done dau zu-na cfam % 6i ^amen %^.!^lm