Micromechanical properties and domain structures of PZN PT piezoelectric single crystals

... mechanical characterization of PZN- PT single crystals can be divided into three parts In the first part, micromechanical properties and deformation characteristics of PZN- PT single crystals were examined ... presents sample materials of PZN- PT single crystals and experimental setup Chapter discusses the nanoindentation technique in characterizing mechanic...

Ngày tải lên: 10/09/2015, 15:48

... PZN -x% PT: single crystal (S) or powder (P) P: 5

Ngày tải lên: 14/09/2015, 08:40

... surface X- ray 44.65o ~43.0-44.0o 42 43 44 45 46 47 2 [010]W [100] L PZN- 4 .5% PT b) b) Fractured surface Intensity (arb units) X- ray X- ray 44. 62 42 43 44 45 o 46 47 2 Figure 5. 1 (0 02) XRD profiles of ... 44.94 ~43 .5- 44.8 42 43 o o 44 45 2 Figure 5. 4 Intensity (arb units) e) PZN- 9%PT Intensity (arb units) 45 2 2 46 47 42 44 .50 o 44.94o 44 .28 o 43 44 45...

Ngày tải lên: 14/09/2015, 08:40

... consisted of highly distorted R phase owing to the soft elastic constants of R The distorted R phases are microscopic in size, of a wide range of lattice parameters and are stressed in intense ... to the poling treatment 5. 4 (a) Summary of main observations The cause for the occurrence of the extremely broad lower 2θ peak adjacent to the main (002)R peak in standard XR...

Ngày tải lên: 14/09/2015, 08:40

... annealing at 600 °C for h and the position shifted further to 2θ ≈ 44 . 05 (Figure 5. 9) 69 as-polished 300oC (1h) ~44 .68 o R Intensity (arb units) 40 0oC (1h) 600oC (5h) ~44 . 05 ~43 .50 41 42 43 ... annealing treatments The heating and cooling rates used were 1 .5 ºC/min Figure 5. 9 shows the (002) XRD profiles of the differently annealed PZN- 4 .5% PT samples and the (...

Ngày tải lên: 14/09/2015, 08:40

... RSM To explain how domain size may affect the (002) diffraction profiles, we begin with diffractions arising from untilted T microdomains By microscale domains, we mean here coarse domains of which ... micro/nanodomains T5 T6 T ω = 0° Figure 6.2 (002) diffraction intensity weighted distributions arising from (a) T microdomains, (b) interference effect of T nanodomains and (c) comb...

Ngày tải lên: 14/09/2015, 08:40

... projection of the coexistence of R micro- and nanotwins onto (002) RSM 112 coexistence of R micro- and nanotwin domains on (002) RSM 7.3 Evidence of rhombohedral micro/nanotwins in PZN- 4 .5% PT at ... domains, a result of the large diffraction width associated with the fine domain structure and the extreme compliant nature of the R phase The diffraction pattern i...

Ngày tải lên: 14/09/2015, 08:40

... and (b) PZN- 7% PT, and (c) and (d) PZN- 8%PT single crystals 1 27 sample of PZN- 7% PT and PZN- 8%PT, respectively, but of the same wafers as in Figures 8.1(a) and (c) These peaks lie in two different ... Ruling out both MB and MC phases being the viable phase, the peak(s) at 2θ ≈ 44-90- 45. 0° must arise from the (100)T domains We may thus conclude that “LT” pha...

Ngày tải lên: 14/09/2015, 08:40

... (b) 85 ºC P/A= 0º P/A= 45 (c) 1 05 ºC P/A= 0º P/A= 45 (d) 1 45 ºC P/A= 0º P/A= 45 (e) 1 65 ºC P/A= 0º P/A= 45 (f) 1 68 ºC C P/A= 45 T C T P/A= 45 [100] 200 µm [010] Figure 8. 11 ZFH domain structures ... of (001)T twin diffractions in as-grown PZN- 6%PT single crystal may be due to the higher residual stress and/ or the presence of a much higher portion of T nanotwin domai...

Ngày tải lên: 14/09/2015, 08:40

... of the depolarization and R-T phase transformation events in poled PZN- PT single crystals PZN- 4 .5% PT and PZN- 7%PT single crystals, of [100]L×[010]W×[001]T in orientation and 6L×2W×0.35T mm3 in ... tilting of the R diffraction out of the ω = 0° plane indicates that both crystals existed in a strained state as the result of poling induced stresses This find...

Ngày tải lên: 14/09/2015, 08:40

... emergence of R-T phase transformation in PZN- PT single crystals, giving TR-T(L) ≅ TDP ≅1 05- 110 °C for PZN- 4 .5% PT and ≅90 -100 °C for PZN- 7%PT These results, including the upper bound values of TR-T, ... (b) 110 ºC, and (c) 1 15 ºC The intensity contours are in log scale T# indicates the vague T diffractions TNT denotes the T at ∆ω ≠ 0º 172 o ε' (x1 0 ) (a) 100 C ε'...

Ngày tải lên: 14/09/2015, 08:40

... crystal domains in single crystal relaxor ferroelectric, J Appl Phys., 87, p 8 159 -8164 2000 70 Yin, J and W Cao Domain configurations in domain engineered 0. 955 Pb(Zn1/3Nb2/3)O3-0.045PbTiO3 single crystals ... (001)T domains in PZN( 6-8)%PT crystals, which are shadowed by the R domains upon fracturing (b) To investigate the effects of temperature and E-field on the R and...

Ngày tải lên: 14/09/2015, 08:40

... ***** A DISSERTATION ON THE MEDICAL PROPERTIES AND INJURIOUS EFFECT OF THE HABITUAL USE OF TOBACCO: READ, ACCORDING TO APPOINTMENT, BEFORE THE MEDICAL SOCIETY OF THE COUNTY OF ONEIDA, AT THEIR ... consumers, and why the candid among them acknowledge that these evils arise from its use? The health of the medical gentleman above named was materi...

Ngày tải lên: 17/02/2014, 22:20

... in a time-dependent enhancement of the 57-kDa band with a concomitant diminution of the 38-kDa and 19-kDa bands, as analyzed by SDS ⁄ PAGE (Fig 3A) The 38-kDa and 19-kDa bands did not disappear ... government works A Okubo et al A Kumamolisin-As with an engineered active site B C Fig PAGE analyses of the wild-type and mutants of kumamolisin-As Arrows indicate the...

Ngày tải lên: 19/02/2014, 07:20

... following nine mutations: V106A, V106G, V106H, V106I, V106K, V106L, V106M, V106Q and V106T We then characterized the enzymatic properties of the mutant enzymes The apparent native sizes of the –ATP ... of dTMP formation and thymidine concentration Open symbols, +ATP forms; closed symbols, –ATP forms (A) Dimeric enzymes: V106WT, V106A, V106I and V106T; (B) tetrameric enzymes:...

Ngày tải lên: 16/03/2014, 16:20