tailoring dielectric properties of perovskite ceramics at microwave frequencies

... sintered at 950°C were measured at frequencies of 1, 10, and 100 kHz -6- Figure Dielectric loss at room temperature of BNZT ceramics The samples sintered at 950°C were measured at frequencies of 1, ... previous report of Yamada et al [6] who mentioned that the approximate phase transition point of the BNT-BNZ binary system was at a Zr/Ti ratio of 0.6:0.4 Quantitative data of lattice parameters ... dependence of BNZT ceramics of dielectric constant at frequencies of 1, 10, and 100 kHz All samples showed a decreasing trend of the relative permittivity when the frequency increased This variation...

Ngày tải lên: 20/06/2014, 23:20

... previous report of Yamada et al [6] who mentioned that the approximate phase transition point of the BNT-BNZ binary system was at a Zr/Ti ratio of 0.6:0.4 Quantitative data of lattice parameters ... dependence of BNZT ceramics of dielectric constant at frequencies of 1, 10, and 100 kHz All samples showed a decreasing trend of the relative permittivity when the frequency increased This variation ... temperature of BNZT ceramics The samples sintered at 950°C were measured at frequencies of 1, 10, and 100 kHz Page of Table Dielectric constant and loss of the BNZT and BNZ ceramics x εra tanδa...

Ngày tải lên: 21/06/2014, 17:20

... that the protective effect of Traumeel may be because of reduced degradation or activated formation of ECM, attenuated migration and/or mobilization of granulocytes, or reduced susceptibility of ... demonstrated that the efficacy of 28 days of local treatment with Traumeel ointment was comparable to that of diclofenac gel.15 Improvements were observed in most patients after to days of treatment ... mechanism of action of linearly inhibiting one of the master regulators of inflammation-related mechanisms.81 The totality of preclinical research suggests that Traumeel has a remarkable scope of action...

Ngày tải lên: 21/02/2014, 17:20

... and dielectric loss of PMNT/ZnO ceramics measured at room temperature The upper group showed the relation of dielectric constant and ZnO content The other lower group showed the relation of dielectric ... Promsawat M, Watcharapasorn A, Sreesattabud T, Jiansirisomboon S: Effect of ZnO nano-particulates on structure and properties of PZT/ZnO ceramics Ferroelectrics 2009, 382:1-7 10 Promsawat M, Watcharapasorn ... values of the calculated lattice parameter as shown in Table SEM micrographs of the fractured surface of PMNT/ZnO ceramics are shown in Figure Average grain sizes tabulated in Table indicated that...

Ngày tải lên: 20/06/2014, 23:20

... and dielectric loss of PMNT/ZnO ceramics measured at room temperature The upper group showed the relation of dielectric constant and ZnO content The other lower group showed the relation of dielectric ... Promsawat M, Watcharapasorn A, Sreesattabud T, Jiansirisomboon S: Effect of ZnO nano-particulates on structure and properties of PZT/ZnO ceramics Ferroelectrics 2009, 382:1-7 10 Promsawat M, Watcharapasorn ... values of the calculated lattice parameter as shown in Table SEM micrographs of the fractured surface of PMNT/ZnO ceramics are shown in Figure Average grain sizes tabulated in Table indicated that...

Ngày tải lên: 21/06/2014, 17:20

... and dielectric loss of PMNT/ZnO ceramics measured at room temperature The upper group showed the relation of dielectric constant and ZnO content The other lower group showed the relation of dielectric ... Promsawat M, Watcharapasorn A, Sreesattabud T, Jiansirisomboon S: Effect of ZnO nano-particulates on structure and properties of PZT/ZnO ceramics Ferroelectrics 2009, 382:1-7 10 Promsawat M, Watcharapasorn ... values of the calculated lattice parameter as shown in Table SEM micrographs of the fractured surface of PMNT/ZnO ceramics are shown in Figure Average grain sizes tabulated in Table indicated that...

Ngày tải lên: 21/06/2014, 17:20

... density of 4.7 gcm–3 at 1250oC, whereas MBNT4 showed a maximum density of 5.4 gcm–3 at 1300oC This result indicates that the excess TiO2 in MBNT5 promotes densification at low temperature, and ... BaO-TiO2 system One of the materials described as having practical applications as a DR was BaTi4O9, which has an εr~38 and Q.fr ~28160 at 11GHz.4 These results provoked exploration of materials in several ... influence the microwave properties of dielectric materials, including the contents of individual crystalline, secondary phases and the degree of densification Therefore, a series of experiments was...

Ngày tải lên: 07/08/2014, 14:20

... Nanofiltration Dialysis Forward osmosis Electrodialysis Major applications Separation of bacterial and cells Separation of proteins and virus Separation of dye and sugar, water softening Seawater ... (artificial kidney) Seawater desalination Separation of electrolytes Membrane distillation Water purification and desalination Reverse Osmosis Gas separation Pervaporation Concentration driven Electric ... POSS®-Matrimid®-Zn2+ Nanocomposite Dense Films for the Separation of Natural Gas ………………………………………………… 45 3.2.1 Preparation of Hybrid POSS® Matrimid Nanocomposite Membranes … 45 3.2.2 Post-treatment of...

Ngày tải lên: 09/09/2015, 17:56

... size of 6.70 nm at different strain levels (a) the atomic configuration at 0% strain; (b) the atomic configuration at 4.4% strain; (c) the atomic configuration at 9.6% strain; (d) the relative ... relative displacement of the atomic motion in the x-direction to the uniform deformation at 4.4% strain; (d) the atomic configuration at 19.2% strain; (e) the relative displacement of the atomic ... different deformation stages (a) the atomic configuration before deformation; (b) the atomic configuration at 9.6% deformation; (c) the relative displacement of the atomic motion in the x-direction...

Ngày tải lên: 30/09/2015, 14:23

... determination is useful The value of Phosphate varies from minimum of 0.005mg/L (Jan) at Shiwala Ghat to maximum of 1.58mg/L (June) at Raj Ghat significantly lower phosphate content was recorded at ... expression of the ability of water sample to carry an electric current The value ranged from maximum of 843µs (Jan) at Raj Ghat to minimum of 185µs (July) at Shiwala Ghat 3.10 Nitrate It represents ... represents the end product of oxidation of Nitrogenous matter and its concentration may depend on the nitrification and denitrification activities of micro organism The concentration of microorganism ranged...

Ngày tải lên: 05/09/2013, 16:11

... is seen that on preincubation with saturating concentrations (Fig 3B) of the biopterin cofactors or dopamine the rate of phosphorylation was decreased, and at 200 lM of the ligands the inhibition ... occur to generate the active intermediate for the coupled hydroxylation of the cosubstrates [21,41] However, the sequence of binding of cofactor and substrate is still a matter of discussion ... concentration of L-Phe at half-maximum saturation ([S]0.5) of 98 lM (Fig 2A,B) Saturation was reached at approximately mM with a DRU-value of 75 RU/(pmol subunitặmm)2) Simultaneous injection of L-Phe (variable...

Ngày tải lên: 17/03/2014, 09:20

... affected the area of the sensor surface which related to the number of adsorbed oxygen ions and the gas sensing properties Also, we assumed that the high heat treatment temperature of the sensor ... permittivity of the semiconductor, and Nd the volumetric density of the electron donors From Eq (2), we can know that the sensitivity of the sensor is dominated by the number of adsorbed oxygen ions at ... oxygen in lattice O O That is, WO3 doping induces an increase of the oxygen partial pressure at the sensor surface So, at high working temperature such as 600 °C, there is large number of adsorbed...

Ngày tải lên: 19/03/2014, 16:48

... coordinates of molecular parameters of each model) the regions of different types of fluid phase diagrams generated from the equations of state Due to the absence of a general liquid-gas-solid equation ... the numerator indicates the number of units of solute and the denominator shows the number of units (usually one unit) of solution (or of solvent, if it is indicated) A designation of the units ... International Association for the Properties of Water and Steam (IAPWS), the organization which is renowned for setting international standards for properties of pure water and high-temperature aqueous...

Ngày tải lên: 01/04/2014, 11:22

... top view of final structure However, the maximum MR was found to be at temperatures below the TP and TPB temperatures; LSMO shows an MR ratio of $16% at 210 K and the LMO MR ratio is $52% at 200 ... images of anisotropically etched LSMO/LMO superlattices with pillar heights of lm and the schematic of final structure of LSMO/LMO superlattices for I-V cross-plane measurement (b) Side view of final ... thermoelectric operation at 300 K Modification of the barrier height and doping levels for a specific operating temperature range will be necessary to fully evaluate the potential of this approach...

Ngày tải lên: 06/05/2014, 08:53

... hydroxyapatite doped with Ag at 100°C Preparation of Ag-doped hydroxyapatite by coprecipitation method at 100°C has several advantages over other techniques Specifically, it can generate highly ... were attributed to adsorbed water diminished for the HAp_Ag20 sample The changes are attributed to the substitution of Ag + from Ca 2+ into the lattice of apatite Bands’ characteristics of the ... Mawatari M, Hotokebuchi T: Development of novel thermal sprayed antibacterial coating and evaluation of release properties of silver ions J Biomed Mater Res B Appl Biomater 2008, 89B:456-465 22 Sanpo...

Ngày tải lên: 20/06/2014, 23:20

... lowering of the melting point of these solid solutions The εr and tan δ of Bi0.5Na0.5Ti1-xZrxO3 ceramics, at · the frequency of 100 kHz, are tabulated in Table In general, increasing Zr concentration ... partly due to the effect of a different crystal structure in this series of materials Hence, this study showed that the observed dielectric and ferroelectric properties of BNTZ ceramics largely depended ... and electrical properties of bismuth sodium titanate zirconate ceramics Nanoscale Research Letters 2012 7:57 Author details Department of Physics and Materials Science, Faculty of Science, Chiang...

Ngày tải lên: 21/06/2014, 17:20

... of magnetic hysteresis loop, it exhibits the soft magnetic property of prepared LSMO The saturation magnetizations (Ms) decrease gradually with the decrease of the particle size, the values of ... respectively, which are somewhat lower than that of the corresponding bulk material For nanoparticles, the broken exchange bonds and the translational symmetry breaking of the lattice at the surfaces induce ... exhibit excellent microwave absorption properties The analysis of experimental data shows that the optimal reflection loss reaches -41.1 dB at 8.2 GHz with a matching thickness of 2.2 mm, the bandwidth...

Ngày tải lên: 21/06/2014, 20:20

... pretreated in NH3 plasma for 10 at input microwave powers of 300–450 W, operating pressure of Torr and with NH3 flow rate of 40 sccm CNT films were deposited at different microwave power varying from ... flow rate ratio of 20/40 and a pressure of Torr for Under these conditions, substrate temperature varied in the range of 350–550 °C Scanning electron microscope (SEM) (LEO 435 VP) operating at 15 ... observed at low input microwave power With increase in microwave power both plasma density and substrate temperature increase, resulting more number of CNTs nucleation and growth CNTs of varying...

Ngày tải lên: 22/06/2014, 06:20

... pretreated in NH3 plasma for 10 at input microwave powers of 300–450 W, operating pressure of Torr and with NH3 flow rate of 40 sccm CNT films were deposited at different microwave power varying from ... flow rate ratio of 20/40 and a pressure of Torr for Under these conditions, substrate temperature varied in the range of 350–550 °C Scanning electron microscope (SEM) (LEO 435 VP) operating at 15 ... observed at low input microwave power With increase in microwave power both plasma density and substrate temperature increase, resulting more number of CNTs nucleation and growth CNTs of varying...

Ngày tải lên: 22/06/2014, 19:20

... ability to stimulate T cells MSCs also inhibit the IL-1 and CD40 ligand induced maturation of immature into mature DCs Aggarwal and Pittenger [28] also demonstrated that MSCs cause immature DCs to ... coworkers have confirmed this observation and Page of 10 (page number not for citation purposes) demonstrated that MSCs mediate a block of the monocyte cell cycle at the G0 phase in this case also ... soluble factors that mediate inhibition of differentiation are produced as a result of crosstalk between MSCs and DCs Expression by DCs of costimulatory molecules is downregulated, and DCs exhibit...

Ngày tải lên: 09/08/2014, 08:23