http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Zupei (검색결과 5 건)
- 무료
- 기관 내 무료
- 유료
-
Effect of BiFeO3 addition on Bi2O3–ZnO–Nb2O5 based ceramics
Xiaolian Chao,Zupei Yang,Chao Kang,Rui Gu 한국물리학회 2010 Current Applied Physics Vol.10 No.1
In this paper, low temperature sintering of the Bi2(Zn1/3Nb2/3)2O7 (b-BZN) dielectric ceramics was studied with the use of BiFeO3 as a sintering aid. The effects of BiFeO3 contents and the sintering temperature on the phase structure, density and dielectric properties were investigated. The results showed that the sintering temperature could be decreased and the dielectric properties could be retained by the addition of BiFeO3. The structure of BiFeO3 doped b-BZN was still the monoclinic pyrochlore phase. The sintering temperature of BiFeO3 doped b-BZN ceramics was reduced from 1000 ℃ to 920 ℃. In the case of 0.15wt.% BiFeO3 addition, the b-BZN ceramics sintered at 920 ℃ exhibited good dielectric properties, which were listed as follows: εr = 79 and tan δ = 0.00086 at a frequency of 1 MHz. The obtained properties make this composition to be a good candidate for the LTCC application.
-
Urban Flood Resilience Assessment Based on VIKOR-GRA: A Case Study in Chongqing, China
Xiaobo Chen,Zupei Guo,Hengyu Zhou,Xikun Qian,Xuesheng Zhang 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.9
Flooding has been considered as one of the major challenges of urban hazards resilience assessment. Improving urban flood risk resilience has become a critical issue for city management. However, urban flood assessment models on the resilience perspective are rare. Meanwhile, in the perspective of resilience, the existing studies using the TOPSIS (Technique for Order Preference by Similarity to an Ideal Solution) assessment method for disaster assessment lack consideration of evaluation scenarios located in the midpoint of positive and negative ideal solutions. To address these issues, this study establishes an urban flood disaster resilience assessment model, selects indicators according to the TOSE (Technical, Organizational, Social and Economic) framework, ranks cities through the VIKOR-GRA (VlseKriterijumska Optimizacija I Kompromisno Resenje, Grey Relational Analysis) method, and proposes measures to improve urban disaster resilience through the resilience assessment. Chongqing is taken as an example in this study to verify the feasibility and effectiveness of the proposed model, and practical management opinions are presented to improve flood resilience in these cities. Through the analysis of actual cases, it can be seen that the model has good applicability and can better reflect the actual situation. The knowledge of flood resilience assessment methods is of particular value to policy makers, researchers and industry professionals in assessing potential risks and recognizing the importance of flood prevention mechanisms.
-
Xiaolian Chao,Zupei Yang,Xiaohui Huang,Difei Ma,Jinghui Zeng 한국물리학회 2009 Current Applied Physics Vol.9 No.6
Effects of ZnO addition on electrical properties and low-temperature sintering of BiFeO3-modified Pb(Zr,Ti)O3–Pb(Fe2/3W1/3)O3–Pb(Mn1/3Nb2/3)O3 were investigated. The investigations revealed that the sintering temperature can be decreased to 950 ℃, and the favorable properties were obtained with 0.10 wt% ZnO added ceramics. The electrical properties were as follows: d33 = 313 pC/N, Kp = 0.56, tanδ = 0.0053, εr = 1407 and Tc = 295 ℃, which showed that this system was a promising material for the multilayer devices application. Effects of ZnO addition on electrical properties and low-temperature sintering of BiFeO3-modified Pb(Zr,Ti)O3–Pb(Fe2/3W1/3)O3–Pb(Mn1/3Nb2/3)O3 were investigated. The investigations revealed that the sintering temperature can be decreased to 950 ℃, and the favorable properties were obtained with 0.10 wt% ZnO added ceramics. The electrical properties were as follows: d33 = 313 pC/N, Kp = 0.56, tanδ = 0.0053, εr = 1407 and Tc = 295 ℃, which showed that this system was a promising material for the multilayer devices application.
-
Zhanqing Liu,Aigang Lu,Zupei Yang,Yan-Ling Luo 한국고분자학회 2013 Macromolecular Research Vol.21 No.4
A novel poly(acrylamide-co-sodium methacrylate)/polyaniline/carboxylfunctionalized multi-walled carbon nanotubes (P(AM-co-SMA)/PANI/MWCNTs-COOH) composite hydrogels with semi-interpenetrating networks (semi-IPN) was synthesized. Structural and morphological characterizations of the composite hydrogels revealed that a strong compatibility exists between P(AM-co-SMA) and lower PANI/MWNTs-COOH loadings. Measurements of swelling capability for the composite hydrogels indicated that with lower PANI and MWNTs-COOH loading incorporated into the P(AM-co-SMA) network, the composite hydrogels possessed better swelling capability, higher sensitivity to pH environments, good swelling reversibility, higher ultimate compressive strength and good strain recoverable ability. These excellent characteristics may primarily be attributed to effective dispersing of a suitable PANI/MWNTs-COOH loading into the matrix of the polymers, and the formation and weakening or disappearance of a repulsive force based on hydrogen bonds as well as the appearance of attractive forces regarding pole-pole interactions between PANI chains. The composite hydrogels are anticipated to be applied in drug controlled release and issue engineering fields.
-
Hong Pan,Yuting Hou,Xiaolian Chao,Lingling Wei,Zupei Yang 한국물리학회 2011 Current Applied Physics Vol.11 No.3
La_2O_3-doped Bi_0.5(Na_0.68K_0.22Li_0.1)_0.5TiO_3 lead-free piezoelectric ceramics have been successfully prepared by conventional solid state method and the effects of La_2O_3 doping on microstructure and electrical properties of the ceramics were investigated. The X-ray diffraction patterns demonstrated all ceramics possessed pure perovskite structure with rhombohedral symmetry. The temperature dependence of dielectric constant and dielectric loss revealed two abnormal dielectric peaks of T_d and T_m,which implied that from room temperature to 500 ℃ all ceramics underwent two phase transitions which were from ferroelectric to anti-ferroelectric and anti-ferroelectric to paraelectric, respectively. It was also found that the transition temperature T_d decreased with the addition of La_2O_3. Diffuse phase transition and frequency dispersion of the dielectric constant were observed in all ceramics. Dielectric relaxor behavior obeyed the modified Curie―Weiss law. The results revealed that all samples had relaxor characteristics. In addition, for the ceramics with 0.1 wt.% La_2O_3, optimized electrical properties were obtained, which were as follows: ε_r = 1254 (1 kHz), tan δ = 0.0483, d_33 = 192 pC/N, K_p = 0.27,P_r = 29.1 μC/cm^2, and E_c = 29.0 kV/cm.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
