ceramic coatings for high temperature applications

... thermodynamics (i.e for endothermic reactions) would result in increased yields when the reaction is performed at high temperatures; (e) the reactions kinetics are faster at high temperatures; (f) ... and mesophilic proteins at room temperature and increases with temperature, so as to allow for enzymatic activity near 100 °C It is only upon achieving these high temperatures that sufficient molecular ... investing more effort in generating mutant mesophilic proteins that operate at high temperatures, a more straightforward approach may be to search the existing protein database for the appropriate...

Ngày tải lên: 07/03/2014, 05:20

... reference forms the temperature sensor front-end Several topologies have been proposed for BGR with high performance Two BGR designs, one in the conventional temperature [27] and one in the high temperature ... 125°C High Temperature -55°C >125°C standard upper limit for the high temperature category, in the context of this research it is referred to as the temperatures which ensure robust operations for ... into: 1) Temperature control, such as in thermostat 2) On-board or chip temperature measurement, such as in microprocessors, for system performance and reliability 3) Temperature compensation for...

Ngày tải lên: 09/09/2015, 11:33

... 500–600 C, while Si is generally limited to 125 C While the foregoing discussion highlights the advantage of SiC over Si for hightemperature applications, it is still important to maintain the coolest ... readings at each tested temperature and pressure For all experiments, the samples were allowed to dwell at the set temperature for 30 to ensure steady-state conditions before PA characterization ... measurement of the phase shift signal, which exhibited higher noise levels at elevated temperatures as indicated by the larger error bars for higher temperatures in the graphical results that follow...

Ngày tải lên: 06/05/2014, 08:53

Ngày tải lên: 29/06/2014, 09:21

... (Sm2O3) HIGH- κ DIELECTRIC FOR HIGH PERFORMANCE MIM CAPACITORS 3.1 Introduction As discussed in Chapter 2, many high- κ dielectrics have been screened and investigated for MIM capacitors in the applications ... Therefore, high- permittivity (κ) dielectrics have been introduced for MIM capacitors applications These high- κ dielectrics are usually metal oxides, such as HfO2, which have been developed for ... and Thigh-k,phy is the physical thickness of the high- k film In searching suitable high- κ dielectric materials for MIM capacitors, a simple criterion is high dielectric permittivity (κ) and high...

Ngày tải lên: 12/09/2015, 11:24

... based on the choice of feedstock and reforming conditions (S/C ratio, temperature, pressure, w/f) For example, the theoretical composition of biomass-reformed gas (40% H2 , 44% CO and 16% CO2 ... feedstock for steam reforming (CH4 has the highest H/C ratio among hydrocarbons), and the addition of extra steam is required to prevent over-reduction of Fe3 O4 by decreasing R factor of the reformed ... redox rate of iron oxides [67] Even with a high R factor (R = 2) and at high temperature (400 ◦ C), the catalyst managed to maintain its initial activity for over 11 h However, part of the catalyst...

Ngày tải lên: 08/10/2015, 23:01

... Chapter studies the high temperature issues which may affect the circuit performance Some effective high temperature design techniques are introduced to minimize the high temperature effects ... 20 2.8 Performance Metrics 21 Chapter High Temperature Circuit Design 24 3.1 Background 24 3.2 Temperature Effect on Threshold Voltage 24 3.3 Temperature ... considerations dedicated for high temperature environment In this work, a design of 3rd-order ΣΔ modulator has been presented in details It is capable to operate in high temperature environment...

Ngày tải lên: 12/10/2015, 17:36

... characteristics Higher Higher Higher Higher Higher Higher the the the the the viscosity of the solution drying speed of the film curing speed of the film susceptibility to low temperature chemical ... these inorganic coatings in terms of long-term corrosion protection performance clubbed with their high temperature resistance It can, therefore, be expected that ethyl silicate based coatings will ... baked, post-cured and self-cured coatings 2.1.1 Baked coatings These are the coatings which require heating to convert the coating films into water insoluble form These coatings are characterised by...

Ngày tải lên: 30/05/2014, 12:08

... occurrence of partial gelatinization of starch at high temperature Some researchers suggested the need for tempering the grain for 25-30 minutes if high temperature drying is used (Poomsa-ad et al ... moisture level High temperature drying can allow to dry the paddy faster, therefore, the space and time taken to dry the paddy can be much shorter This can serve as a compact drier High temperature ... the drying time for the rice at these high temperature conditions, although no experiment was done for less than 2.5 assuming that we will not achieve enough moisture removal for shorter time...

Ngày tải lên: 21/06/2014, 06:20

... first paper, High- altitude platforms for disaster recovery: capabilities, strategies, and techniques for emergency telecommunications,” by J Deaton, presents a very well-reasoned case for using ... coexistence performance assessment and techniques for WiMAX services from highaltitude platform and terrestrial deployments,” by Z Yang et al., the authors investigate the performance and coexistence ... multi-antenna payload, and both uplink and downlink performances are analyzed The forth paper “Coexistence performance of highaltitude platform and terrestrial system using gigabit communication...

Ngày tải lên: 21/06/2014, 23:20

... explanation for high sp3 fraction observed in highly biased coatings is the ion impingement and re-sputtering of carbon atoms from the graphite clusters High bias voltage results in high energy ... bias voltage on the surface roughness of DLC coatings: coatings deposited under higher bias voltage has smoother surface (lower Ra) The Ra was as high as 3.1 nm with coating deposited under -20 ... brittle fracture at high applied load can be avoided The calculated plasticity was 43 % for the coating deposited under -150 V bias Such plastic compliance is evaluated high for a hard coating...

Ngày tải lên: 22/07/2014, 03:20

... procedure for conducting thermal performance assessments, using the indirect (losses) procedure, to give results within a tolerance of ± percentage points1) for boilers for steam, hot water or high temperature ... Duration of test Ambient temperature t3 Temperature of gases leaving boiler °C t4 Temperature of water leaving boiler °C t5 Temperature of water entering boiler °C ta Temperature of air entering ... typical exit gas temperatures an increase in CO2, or decrease in O2, of 0.5 % will decrease the dry gas loss by about one percentage point For further information see Appendix B 5.2.2 For the purposes...

Ngày tải lên: 28/09/2014, 23:11

Ngày tải lên: 14/11/2014, 08:07

... drilling industry to transmit information such as temperature and pressure However, typical operation temperature in oil drilling is more than 200º and thus such high temperature C operation environment ... SPECIFICATIONS FOR ACOUSTIC TRANSMITTER 19 Table 2-1 PERFORMANCE COMPARISON OF CRYSTAL-LESS TEMPERATURE- INDEPENDENT FREQUENCY REFERENCE 49 Table 3-1 PERFORMANCE COMPARISONS OF CRYSTAL-LESS TEMPERATURE- INDEPENDENT ... little system performance information [6] There are a few challenges in designing acoustic transmitter for oil drilling application First, the temperature in drilling pipes is extremely high, which...

Ngày tải lên: 09/09/2015, 11:05

... and R Chau, “Advanced high- k gate dielectric for high- performance short-channel In0.7Ga0.3As quantum well field effect transistors on silicon substrate 24 for low power logic applications, ” in IEDM ... function of PDA temperature for GaAs MOS capacitors Dit attained at various PDA temperatures is depicted in the inset - 38 viii Fig 2.7 C-V forward- and reverse sweeps for capacitors with ... to out perform strained-Si N-MOSFETs despite the high electron mobility in bulk Ge In addition, formation of low resistance S/D is also very challenging for Ge N-channel devices The performance...

Ngày tải lên: 11/09/2015, 10:01

... DEVELOPING HIGH- THROUGHPUT AMENABLE CHEMISTRY FOR CHEMICAL BIOLOGY APPLICATIONS RAJAVEL SRINIVASAN (M.Sc., Anna University, Chennai, India) A THESIS SUBMITTED FOR THE DOCTOR OF PHILOSOPHY ... for his support and helps I also wish for my relation/contact with Prof Yao continues for ever Next, I am very grateful to Prof Bahulayan (Calicut University) and Prof Chang Young-Tae (NUS) for ... biology It is for the same reasons that click chemistry has emerged as an integral part of the drug discovery pipeline by providing a high- throughput amenable chemical reaction platform for compound...

Ngày tải lên: 14/09/2015, 14:05

... adjustment factor for a process with average fraction nonconforming = 50 ppm, ψ = 0.2 and θ = 0.0002 Table 5.7 Number of conforming items observed before observing a nonconforming item (for p = 500 ... attribute charts commonly used for this purpose are: • p chart: Used for monitoring the fraction nonconforming in a sample • np chart: Used for monitoring number of nonconforming items per sample, ... Figure 3.7 The CQC3 chart for the data in Table 3.12 Figure 3.8 The c chart for the data in Table 3.13 Figure 4.1 The CQC chart for data in Table 4.6 Figure 4.2 The CUSUM chart for data in Table 4.6...

Ngày tải lên: 15/09/2015, 20:57

... Purchasing factors for high- tech consumer products 3.1.2 Purchasing factors for high- tech products in business-to-business activities 79 3.1.3 3.2 Specific purchasing criteria for high- tech products ... is a high- tech product? 1.3 What is high- tech marketing? 1.4 The Meaning of Marketing for High- Tech Firms Summary It is clear that successful marketing strategies have been fundamental for all ... frequently Product is innovative for the market Product requires high R&D investments Product is intended for specific markets Product is integrated into hightech applications R&D = Research & development...

Ngày tải lên: 21/09/2012, 17:27

... particular importance in the communication strategy of high- tech products 8.1 Communication for high- tech products The three main characteristics of a high- tech product—technology, rate of change, and ... communication tools for B2B companies This underlines the role of a direct sales force, which is to be not only a distribution channel, but also 222 Communication Strategy for High- Tech Products ... shows are Comdex for microcomputers in Los Angeles, Kunstoff for the plastics industry in Dusseldorf, Biotechnica for the biotech industry in Hannover, and the Paris Air Show for aeronautics Most...

Ngày tải lên: 24/10/2013, 07:20