Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: September 2013
Authors: Xin Hua Yao, Bo Yang, Jian Zhong Fu, Yi Wang, Wen Li Yu
Eq.1 is a differential equation of {T}.The basic purpose of thermal modal analysis is to obtain a temperature curve fitting by solving Eq.1.
The system shown in Fig.1 represents the system’s basic compensation mechanism.
Reference [1] R.
Wu, Time series and system analysis with applications, Wiley, New York Trans ASME. 115 (1983) 472–479
J EngInd. 115 (1993) 472-479
The system shown in Fig.1 represents the system’s basic compensation mechanism.
Reference [1] R.
Wu, Time series and system analysis with applications, Wiley, New York Trans ASME. 115 (1983) 472–479
J EngInd. 115 (1993) 472-479
Online since: August 2019
Authors: Jasman Jasman, Irmayani Pawelloi Andi, Abd. Jabbar Andi, Rahmawati Rahmawati, Mustakim Mustakim
Figure 1.
Table 1.
References [1].
Page: 1-7
Jakarta Hal: 1-18.
Table 1.
References [1].
Page: 1-7
Jakarta Hal: 1-18.
Online since: December 2012
Authors: Sophia Arnauts, Paul W. Mertens, Daniel Cuypers, Stefan de Gendt, Dennis H. van Dorp
Cleaning of III-V Materials: Surface Chemistry Considerations
Dennis H. van Dorp1, a, Daniel Cuypers2, Sophia Arnauts1, Paul Mertens1,
and Stefan De Gendt1, 2
1 IMEC Interuniversity Microelectronics Center, Kapeldreef 75, B-3001 Leuven, Belgium
2 Katholieke Universiteit Leuven, Celestijnenlaan 200F B-3001, Leuven, Belgium
avandorpd@imec.be
Keywords: III-V cleaning, indium phosphide, etch rates, oxide removal
Introduction
Compound semiconductors based on group III and V elements of the periodic system have high charge carrier mobility and are, therefore, candidates for channel material in future CMOS devices [1].
In this model H2O2 is used to oxidize the surface to form an oxide: InP + 2H2O2 ® InPO4 + 2H2 (1) which is in equilibrium with dissolution in acid: InPO4 + 3HCl ® PO43- + InCl3 + 3H+ (2) It is clear that this model only works when the rate of reaction (1) is higher than that of (2).
In Figure 1(a) the influence of the H2O2 concentration on the etch rate in 1M HCl is shown.
b a Figure 1: (a) Etch rate for InP for various H2O2 concentrations in 1M HCl (squares) and 1M H2SO4 (circles).
References [1] J.A. del Alamo: Nature 479 (2011), p. 317 [2] P.
In this model H2O2 is used to oxidize the surface to form an oxide: InP + 2H2O2 ® InPO4 + 2H2 (1) which is in equilibrium with dissolution in acid: InPO4 + 3HCl ® PO43- + InCl3 + 3H+ (2) It is clear that this model only works when the rate of reaction (1) is higher than that of (2).
In Figure 1(a) the influence of the H2O2 concentration on the etch rate in 1M HCl is shown.
b a Figure 1: (a) Etch rate for InP for various H2O2 concentrations in 1M HCl (squares) and 1M H2SO4 (circles).
References [1] J.A. del Alamo: Nature 479 (2011), p. 317 [2] P.
Online since: January 2013
Authors: Yun Hua Lu, Zhi Zhi Hu, Bing Wang, Peng Pan, Hong Bin Zhao
Fig. 3 and Table 1 show the optical properties of PI-1 and PI-2 films.
Fig.3 UV-vis spectrum of PI films Fig.4 TGA curves of PIs Table 1 The properties of PI films PI λcutoffa [nm] T410nma [%] T5%b [˚C] T10%b [˚C] Rw750b [%] PI-1 305.9 81.9 412 471 47.33 PI-2 301.2 83.2 423 479 48.68 aλcutoff: UV cutoff wavelength; T410nm: transmittance at 410 nm. bT5%, T10%: temperatures at 5% and 10% weight loss, respectively; Rw750: residual weight ratio at 750 oC in nitrogen.
The 10% decomposition temperatures of PI-1 and PI-2 were 471 and 479˚C respectively.
Conclusions The fluorinated PI-1 and PI-2 were prepared with 2-tert-butyl-1,4-bis(4-nitro-2-trifluoromethyl phenoxy)benzene, 1,4-bis(4-amino-2-trifluoromethylphenoxy)benzene and 1,2,3,4- cyclobutanetetracarboxylic dianhydride, respectively.
References [1] C.
Fig.3 UV-vis spectrum of PI films Fig.4 TGA curves of PIs Table 1 The properties of PI films PI λcutoffa [nm] T410nma [%] T5%b [˚C] T10%b [˚C] Rw750b [%] PI-1 305.9 81.9 412 471 47.33 PI-2 301.2 83.2 423 479 48.68 aλcutoff: UV cutoff wavelength; T410nm: transmittance at 410 nm. bT5%, T10%: temperatures at 5% and 10% weight loss, respectively; Rw750: residual weight ratio at 750 oC in nitrogen.
The 10% decomposition temperatures of PI-1 and PI-2 were 471 and 479˚C respectively.
Conclusions The fluorinated PI-1 and PI-2 were prepared with 2-tert-butyl-1,4-bis(4-nitro-2-trifluoromethyl phenoxy)benzene, 1,4-bis(4-amino-2-trifluoromethylphenoxy)benzene and 1,2,3,4- cyclobutanetetracarboxylic dianhydride, respectively.
References [1] C.
Online since: November 2012
Authors: Wei Liang, Li Na Zhang, Xiao Wei Li, Yan Di Zuo
The data processing is showed in Figure 1.The output variables of sensor array signal are reduced by principal component analysis, and then get the low-dimensional variables.
We can see that the correlation coefficient between the G1 and G2, G3 and G4, G5 and G7,G6 and G8 are all above 0.9 from the Correlation Matrix shown in Table 1 .
Table 1 Correlation Matrix r Correlation G1 G2 G3 G4 G5 G6 G7 G8 G1 G2 G3 G4 G5 G6 G7 G8 1.000 .997 -.303 -.263 -.259 .633 -.297 .601 .997 1.000 -.346 -.310 -.195 .688 -.237 .645 -.303 -.346 1.000 .992 -.190 -.514 -.081 -.172 -.263 -.310 .992 1.000 -.240 -.522 -.133 -.185 -.259 -.195 -.190 -.240 1.000 .487 .994 .479 .633 .688 -.514 -.522 .487 1.000 .436 .933 -.297 -.237 -.081 -.133 .994 .436 1.000 .467 .601 .645 -.172 -.185 .479 .933 .467 1.000 Generally, the correlation between the principle component and sensors are most same.
The mapping of normalization was as follows: (x, y∈，=min(x)， = max(x) ) The normalized raw data is structured to [0, 1].
References [1] Cheng SM.
We can see that the correlation coefficient between the G1 and G2, G3 and G4, G5 and G7,G6 and G8 are all above 0.9 from the Correlation Matrix shown in Table 1 .
Table 1 Correlation Matrix r Correlation G1 G2 G3 G4 G5 G6 G7 G8 G1 G2 G3 G4 G5 G6 G7 G8 1.000 .997 -.303 -.263 -.259 .633 -.297 .601 .997 1.000 -.346 -.310 -.195 .688 -.237 .645 -.303 -.346 1.000 .992 -.190 -.514 -.081 -.172 -.263 -.310 .992 1.000 -.240 -.522 -.133 -.185 -.259 -.195 -.190 -.240 1.000 .487 .994 .479 .633 .688 -.514 -.522 .487 1.000 .436 .933 -.297 -.237 -.081 -.133 .994 .436 1.000 .467 .601 .645 -.172 -.185 .479 .933 .467 1.000 Generally, the correlation between the principle component and sensors are most same.
The mapping of normalization was as follows: (x, y∈，=min(x)， = max(x) ) The normalized raw data is structured to [0, 1].
References [1] Cheng SM.
Online since: April 2022
Authors: Nadhir Attaf, Labidi Herissi, Zahra Moussa, Lazhar Hadjeris, Nadjet Moussa
Fig. 1.
Table 1.
References [1] M.
Sinter. 1 (2021) 151 168
Mater. 1 (2011) 39 43
Table 1.
References [1] M.
Sinter. 1 (2021) 151 168
Mater. 1 (2011) 39 43
Online since: December 2012
Authors: Liang Chu, Da Sen Bi, Xian Chen Gao, Pei Lin Li, Meng Chen
The material is boron steel 22MnB5 with coating, 1.5mm thick, widely used in hot forming operations.
The chemical composition of blank is shown in table 1： Table 1 The chemical composition of blank C Si Mn Cr N P S Ti Al B 0,20 – 0,25 0,20 – 0,35 1,10 – 1,30 0,15 – 0,25 0,009 0,025 0,005 0,020 – 0,050 0,020 – 0,060 0,002 – 0,005 Hot Forming Process for Experiment. 1.
Furthermore, it shows that the hardness of zone 2 is higher than zone 1 and zone 3.
Table 3 Vickers hardness distribution 1 2 3 4 5 6 average Zone 1 (HV) 496 486 490 484 493 484 488.8 Zone 2 (HV) 507 513 515 513 519 510 512.8 Zone 3 (HV) 479 484 487 479 484 476 481.5 Microstructure investigation.
References [1] Turetta A,Ghiotti A,Bruschi S (2006).
The chemical composition of blank is shown in table 1： Table 1 The chemical composition of blank C Si Mn Cr N P S Ti Al B 0,20 – 0,25 0,20 – 0,35 1,10 – 1,30 0,15 – 0,25 0,009 0,025 0,005 0,020 – 0,050 0,020 – 0,060 0,002 – 0,005 Hot Forming Process for Experiment. 1.
Furthermore, it shows that the hardness of zone 2 is higher than zone 1 and zone 3.
Table 3 Vickers hardness distribution 1 2 3 4 5 6 average Zone 1 (HV) 496 486 490 484 493 484 488.8 Zone 2 (HV) 507 513 515 513 519 510 512.8 Zone 3 (HV) 479 484 487 479 484 476 481.5 Microstructure investigation.
References [1] Turetta A,Ghiotti A,Bruschi S (2006).
Online since: October 2012
Authors: Qing Kun Wang, Shao Ping Pu, Yong Nian Li, Jian He, Li Min Zhou, Ze Bing Zhu, Xue Jie Li, Quan Jin
The result of the elemental analysis was listed in table 1.
Table 2 Main IR spectral data(cm-1) of the title compound Wave number(cm-1) Vibration type group 3216 VNH -NH 1590 δNH -NH 1616 V(as,coo-) COO- 1380 V(s,coo-) COO- 593 VPt-O Pt-O 479 VPt-N Pt-N 3216cm-1 is the characterstic absorption peak of stretching vibration of N-H of (1R,2R)-1,2-cyclohexanediamine. 1590cm-1 is the formation vibration peak of amine.
The bands at about 479 cm-1 is assigned to Pt-N.
The bands at about 593 cm-1 is assigned to Pt-O.
References [1] Moradell S, Lorenzo J, Martinez M, et al.
Table 2 Main IR spectral data(cm-1) of the title compound Wave number(cm-1) Vibration type group 3216 VNH -NH 1590 δNH -NH 1616 V(as,coo-) COO- 1380 V(s,coo-) COO- 593 VPt-O Pt-O 479 VPt-N Pt-N 3216cm-1 is the characterstic absorption peak of stretching vibration of N-H of (1R,2R)-1,2-cyclohexanediamine. 1590cm-1 is the formation vibration peak of amine.
The bands at about 479 cm-1 is assigned to Pt-N.
The bands at about 593 cm-1 is assigned to Pt-O.
References [1] Moradell S, Lorenzo J, Martinez M, et al.
Online since: June 2015
Authors: Mohd Sobri Idris, T.Q. Tan, Rozana Aina Maulat Osman
The lattice parameters for the indexed pattern for the sample that heated at 900 ºC are a= 2.8634(1) Å and c = 14.248(1) Å while for sample that heated at 950 ºC are a = 2.8639(1) Å and c = 14.253(1) Å.
The final model for each temperature is summarized in Table 1.
Temperature (ºC) 900 950 a / Å 2.8634(1) 2.8639(1) c / Å 14.248(1) 14.253(1) Volume / Å3 101.16(1) 101.24(1) Oxygen, Z 0.2428(2) 0.2427(2) 3a Li/Ni occ. 0.973(2) / 0.027(2) 0.979(2) / 0.021(2) 3b Ni/Li occ. 0.306(2) / 0.027(2) 0.312(2) / 0.021(2) 6c O occ. 1.00 1.00 3a Uiso 0.02 0.02 3b Uiso 0.006 0.006 6c Uiso 0.003 0.003 Rwp 3.45 % 3.99 % Rp 2.61 % 2.88 % χ2 0.7457 0.7292 (a) (b) Fig. 2: Rietveld plot of the LiNi1/3Mn1/3Co1/3O2 synthesised at (a) 900 and (b) 950 ºC in oxygen for 12 hours.
References [1] Y.
Osman, Structure refinement strategy of Li-based complex oxides using GSAS-EXPGUI software package, Advanced Materials Research 795 (2013) 479-482
The final model for each temperature is summarized in Table 1.
Temperature (ºC) 900 950 a / Å 2.8634(1) 2.8639(1) c / Å 14.248(1) 14.253(1) Volume / Å3 101.16(1) 101.24(1) Oxygen, Z 0.2428(2) 0.2427(2) 3a Li/Ni occ. 0.973(2) / 0.027(2) 0.979(2) / 0.021(2) 3b Ni/Li occ. 0.306(2) / 0.027(2) 0.312(2) / 0.021(2) 6c O occ. 1.00 1.00 3a Uiso 0.02 0.02 3b Uiso 0.006 0.006 6c Uiso 0.003 0.003 Rwp 3.45 % 3.99 % Rp 2.61 % 2.88 % χ2 0.7457 0.7292 (a) (b) Fig. 2: Rietveld plot of the LiNi1/3Mn1/3Co1/3O2 synthesised at (a) 900 and (b) 950 ºC in oxygen for 12 hours.
References [1] Y.
Osman, Structure refinement strategy of Li-based complex oxides using GSAS-EXPGUI software package, Advanced Materials Research 795 (2013) 479-482
Online since: July 2011
Authors: Guo Qiang Cheng, Yan Jin Song
Figure 1 shows the model of working face calculating stratum subsidence.
The mechanical parameters of each overlying stratum could be found in table 1.
Table 1 Geologic column and parameters of overlying strata Layers Height[m] Elastic modulus [Gpa] Density [kg·m-3] Poisson ratio J 440 15 3354 0.38 I2 455 3 2578 0.22 I1 459 5 2545 0.26 H 463 2.5 2278 0.25 G 466 4.5 2986 0.38 F 472 3 2645 0.34 E2 479 2.5 2502 0.26 E1 484 2.2 2252 0.23 D 486 1.2 1812 0.15 The subsidence of layers from D to J when the length of face advances is 140 meters is depicted in Fig.3 (Eq. (1) and Eq. (2)).
The following figures are the descriptions of porosities along the trend in 479 meters depth while face advances are 60m, 75m, 90m, 115m and 140m(Eq.(4)).
Conclusions (1)There are different movements in overlying strata.
The mechanical parameters of each overlying stratum could be found in table 1.
Table 1 Geologic column and parameters of overlying strata Layers Height[m] Elastic modulus [Gpa] Density [kg·m-3] Poisson ratio J 440 15 3354 0.38 I2 455 3 2578 0.22 I1 459 5 2545 0.26 H 463 2.5 2278 0.25 G 466 4.5 2986 0.38 F 472 3 2645 0.34 E2 479 2.5 2502 0.26 E1 484 2.2 2252 0.23 D 486 1.2 1812 0.15 The subsidence of layers from D to J when the length of face advances is 140 meters is depicted in Fig.3 (Eq. (1) and Eq. (2)).
The following figures are the descriptions of porosities along the trend in 479 meters depth while face advances are 60m, 75m, 90m, 115m and 140m(Eq.(4)).
Conclusions (1)There are different movements in overlying strata.