Báo cáo hóa học: " Electrical resistance of CNT-PEEK composites under compression at different temperatures" pptx

... is a saturation phenomenon for both the amount of fillers and the level of compression. This means that the rate of reduction of electri- cal resistance is more at lower levels of CNT and compression ... 2,109 Ω 2,280 Ω 7.5 Figure 2 Comparison of electrical resistance at different temperatures and at zero pressure. Figure 3 Electrical resistance vs. pressure...

Ngày tải lên: 21/06/2014, 03:20

... that of bulk BaTiO 3 materials. It is confirmed that the nanoparticles have tetragonal phase at room temperature. Keywords: BaTiO 3 , nanoparticle, room temperature Introduction Barium titanate ... region of the photo, indicating that the particles under observation are well crystallized. Three patterns of the lattice spacings are observed, such as 4.05, 2.87, and 2.35 Å which match...

Ngày tải lên: 21/06/2014, 01:20

... B thin films at a precursor temperature of 60°C, indicating that the thin film is amorphous. It has been reported that the onset temperature of the thermally activated transformation from an ... the glass substrate at 400°C exists up to the precursor temperature of 60°C. The anatase phase appears at a precursor temperature of 75°C. The influence of the precursor temperature...

Ngày tải lên: 21/06/2014, 17:20

... it can be inferred that volatile Na and K ions were evaporated at the high sintering temperature and relative bulk density was decreased. The maximum dielectric constant of 0.98NKN-0.02BZT ceramics ... at 1,090°C. Figure 5 shows the d 33 , k p , and relative density of the poled 0.98NKN-0.02BZT ceramics sintered at various sintering temperatures. It is obvious that d 33 , k p...

Ngày tải lên: 20/06/2014, 23:20

... same activation energy as that of H 1 (0.14 eV) [11], but seem to be different in nature than t hat of H 1 . For example the capture cross-section of H 1 [11] was found to be temperature-dependent, ... on A-faces [1,2]. Investigation of the effect of the electric field on car- rier emission rate is one of the useful measurements that give information about the nature of the de...

Ngày tải lên: 21/06/2014, 05:20

... that different con- ductive paths appear with different probabilities in a film of MWCNT embedded in polyethylene. The MWCNT -PMMA [poly(m ethyl methacrylate)] composites also exhibit percolation ... investigated in the literature, related to film composition and thickness, temperature, nanotubes concentration and shape, and so on. The electrical con- ductivity o f oxidized MWCNT-ep...

Ngày tải lên: 21/06/2014, 06:20

... the influence of smoking on internal exposure by measure- ment of cotinine in the urine of the workers. In view of the explanatory nature of our data, we used the RIE index to compare the values of external ... the concentration of o-toluidine in ambient air at the workplace and the relative internal expo-sure (RIE)Figure 1 Relationship between the concentration of o-toluidi...

Ngày tải lên: 20/06/2014, 00:20

... selected series of compensated patients with moderate to severe DPT found that 95.5% complained of breathlessness 65% of moder- ate breathlessness and 11% of severe breathlessness [6]. A single ... thick Associated features Rounded atelectasis, parenchymal bands Treatment Supportive, symptomatic, non invasive ventilation for respiratory failure Differential diagnosis Any cause of ac...

Ngày tải lên: 20/06/2014, 00:20

... early administration of this treatment is desirable, there have been cases of both mortality and survival even after patients had entered a state of shock. Another anecdotal study reports that a patient ... thiosulfate is not efficacious, though it is used to treat cyanogen poisoning. (sodium thiosulfate does not have any negative effect for treatment of H 2 S poisoning.) Morii et al....

Ngày tải lên: 20/06/2014, 00:20