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Effect of Sr^2+ and Dy^3+ co-doping on coloration and temperature stabilization of a γ-Ce2S3 red pigment

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Journal of Rare Earths 2020年第2期38卷 213-218页

作者： Yueming li qi liu Fusheng Song Zhumei Wang Zongyang Shen Yan Hong National light Industry Key Laboratory of Functional Ceramic Materials Energy Storage and Conversion Ceramic Materials Engineering Laboratory of Jiangxi ProvinceSchool of Materials Science and EngineeringJingdezhen Ceramic InstituteJingdezhen 333403China

In this paper,a Sr^2+and Dy^3+co-doped γ-Ce2S3 red pigment was synthesized via a combination of coprecipitation and sulfurization *** oxide was prepared by presintering the coprecipitates,(Ce,Sr,Dy)CO3,followed by high-temperature sulfurization under a CS2 *** effects of the sulfurization temperature,time,and doped proportion on the phase composition,color performance and temperature stability of γ-Ce2S3 were systematically *** results show that a stable γ-Ce2S3 red pigment can be obtained through Sr^2+and Dy^3+co-doping at 730℃ for 200 *** diffraction peaks of all the samples shift to higher 2θ values with increasing doping proportion,indicating that part of the Dy^3+species enter the lattice and form a solid *** band gap of the samples remains practically constant at 2.01-2.04 eV,which causes their red *** best red-color quality(L*=37.13,a*=34.77,b*=29.44) is achieved when the pigment has a Dy^3+/Ce^3+molar ratio of 0.15,and the material maintains its excellent red color(L*=31.49 a*=30.94 b*=25.33) after being heated at 410℃ for 30 min.

关键词： γ-Ce2S3 Red pigment Co-precipitation Sr^2+,Dy^3+ co-doped Rare earths

Facile Synthesis and Adsorption Properties of Phosphonated Cellulose Beads for Selective Removal of Low-density lipoprotein

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Chinese Chemical Letters 2006年第9期17卷 1193-1196页

作者： Hao Feng YU Guo qi FU li liu Bing lin HE The Key Laboratory of Functional Polymer Materials of Ministry of Education Institute of Polymer Chemistry Nankai University Tianjin 300071

A novel low-density lipoprotein adsorbent was prepared simply by directly phosphonating porous cellulose beads. Tests in vitro demonstrated that this adsorbent showed quite good adsorption performance for selective removal of low-density lipoprotein from human plasma. The effects of preparation conditions on the lipoprotein sorption properties of the resulted adsorbent were investigated. The adsorption dynamics was also examined.

关键词： Cellulose beads phosphonation low-density lipoprotein adsorption hyperlipemia

Atomic packing and short-to-medium range order evolution of Zr-Pd metallic glass

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Chinese Science Bulletin 2011年第36期56卷 3908-3911页

作者： qi li liu Mei ZHANG Shiliang ZHANG XinYu TAN Chunlin State Key Laboratory of Metastable Materials Science ＆ Technology Yanshan University Qinhuangdao 066004 China

A larger-scale Zr70Pd30 alloy system has been simulated using molecular dynamics (MD) to investigate structure evolution in Zr70Pd30 metallic glass. The simulated pair distribution function of Zr70Pd30 metallic glass agrees well with the experimental results. Voronoi polyhedron analysis indicates that the icosahedra are not randomly distributed in space,but form characteristic intercrossed icosahedral clusters with medium-range order. Intercrossed icosahedral clusters are the dominant local configurations in Zr70Pd30 metallic glass and probably cause the quasicrystalline phase discovered in Zr70Pd30 metallic glass.

关键词：金属玻璃中程 Voronoi 演化包装原子二十面体分子动力学

Derivation of Plastic Specific Work Rate for Equal Area Yield Criterion and Its Application to Rolling

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Journal of Iron and Steel Research International 2010年第4期17卷 34-38页

作者： ZHAO De-wen FANG qi li Can-ming liu Xiang-hua WANG Guo-dong State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China

On the basis of the analysis of the hexagons inscribed and circumscribed of the Mises yield circle on the π- plane in Haigh Westergaard stress space, a new equation called equal area linear yield criterion or EA criterion was proposed, and its plastic specific work rate was derived. Then, a generalized worked example of plate rolling was analyzed by the criterion and its corresponding plastic specific work rate. Finally, the precision of the solution was compared with measured roll separation force in plate finish rolling process. It indicates that the calculated results by EA criterion are slightly higher than the measured ones.

关键词： EA yield criterion specific work rate finish rolling analytical solution

The first CCD photometric study of the open cluster NGC 744

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Research in Astronomy and Astrophysics 2018年第11期18卷 89-96页

作者： Kun Wang li-Cai Deng Zhi-Quan Luo Zheng-Zhou Yan qi-li liu Jin-Jiang Sun qiang Zhou Department of Astronomy China West Normal University Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Purple Mountain Observatory Chinese Academy of Sciences

We present the first CCD photometric observations of open cluster NGC 744, as part of the 50 BiN Open Cluster Survey. The color-magnitude diagrams of this cluster were derived from absolute BV RI photometry on a good photometric night. A brief isochrone fitting gives a distance modulus of(m-M)V= 11.58±0.2 and a reddening of E(B-V) = 0.35±0.05 with an age of log t = 8.30±*** carefully examining the BV time-series data, we discovered four new variable stars in a 20′×20′field around the cluster. We classified them as three eclipsing binary stars and one δ Scuti pulsating star,mainly based on the light-curve shape, the detected periods and the positions on the color-magnitude diagrams.

关键词： open clusters and associations: individual(NGC 744) stars: variables: general

NSVS 1908107, an EB-type eclipsing binary in the open cluster NGC 869

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Research in Astronomy and Astrophysics 2016年第7期16卷 77-82页

作者： Yang Pan Zhi-Quan Luo Xiao-Bin Zhang li-Cai Deng Kun Wang Yang-Ping Luo Wei-Jing Fang Yin-Jiang Peng Jin-Jiang Sun qi-li liu qiang Zhou Physics and Space Science College China West Normal University Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Purple Mountain Observatory Chinese Academy of Sciences

We present a time-series BV CCD photometry for an EB-type eclipsing binary NSVS 1908107, a member of the young open cluster NGC 869. The photometric solution was obtained by using the 2003 version of the Wilson-Devinney code. It reveals that the system is a semi-detached binary with the secondary component filling its Roche lobe. The mass ratio was determined to be 0.059±0.001. With the physical parameters of the cluster, the masses, radii and luminosities of the two components of NSVS 1908107 are estimated to be M1 = 10.34±2.29 M⊙, R1 = 4.65re±0.34 Rspectivel⊙, L1 = 8076 y. The results s±371 L = 2.40 how tha⊙and M2 = 0.61 t the secondary co±0.13M⊙, R2±0.17 R⊙, L2 = 1054±48 L⊙mponent could be a giant or subgiant star with the outer envelope being stripped.

关键词： binaries eclipsing binaries semi-detached stars giant stars individual(NSVS 1908107)

Synthesis, Structure and Gas adsorption Properties of a Novel Fluorinated Metal-Organic Framework

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Synthesis, Structure and Gas adsorption Properties of a Nove...

Photometric solution and period analysis of the contact binary system AH Cnc

中国化学会第28届学术年会

作者： Dong-Ping li, qi liu, Yong-Xiu li

＜正＞Recent studies have shown that hydrogen and carbon dioxide storage in MMOFs can be enhanced by ways of introducing open metal sites, functionalizing ligands, cation exchange or utilizing catenation. Of particula...

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来源： cnki会议评论

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cnki会议

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Research in Astronomy and Astrophysics 2016年第10期16卷 63-70页

作者： Ying-Jiang Peng Zhi-Quan Luo Xiao-Bin Zhang li-Cai Deng Kun Wang Jian-Feng Tian Zheng-Zhou Yan Yang Pan Wei-Jing Fang Zhong-Wen Feng De-lin Tang qi-li liu Jin-Jiang Sun qiang Zhou Physics and Space Science College China West Normal University Nanchong 637002 China National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210008 China School of Physical Electronics University of Electronic Science and Technology of China Chengdu 610054 China

Photometric observations of AH Cnc, a W UMa-type system in the open cluster M67, were car- fled out by using the 50BIN telescope. About 100h of time-series/3- and V-band data were taken, based on which eight new times of light minima were determined. By applying the Wilson-Devinney method, the light curves were modeled and a revised photometric solution of the binary system was derived. We con- firmed that AH Cnc is a deep contact （f = 51%）, low mass-ratio （q - 0.156） system. Adopting the distance modulus derived from study of the host cluster, we have re-calculated the physical parameters of the binary system, namely the masses and radii. The masses and radii of the two components were estimated to be respectively 1.188（4-0.061） Me, 1.332（4-0.063） RQ for the primary component and 0.185（4-0.032） Me, 0.592（4-0.051） Re for the secondary. By adding the newly derived minimum timings to all the available data, the period variations of AH Cnc were studied. This shows that the orbital period of the binary is con- tinuously increasing at a rate of dp/dt = 4.29 x 10-10 d yr-1. In addition to the long-term period increase, a cyclic variation with a period of 35.26 yr was determined, which could be attributed to an unresolved tertiary component of the system.

关键词： methods: data analysis -- astronomical instrumentation -- binaries: eclipsing stars closestars -- Galaxy: open clusters and associations: individual (M67)

THE EFFECT OF IODOMETHANE ON THE DIRECT SYNTHESIS OF DIMETHYL CARBONATE

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Chinese Journal of Catalysis 1999年第6期20卷 585-586页

作者： Jiang qi, li Tao, liu Feng, Huang Zhongtao (Department of Chemical Engineering, South China University of Technology, Guangzhou 510641) 华南理工大学广东广州

Dimethyl carbonate (DMC) is an environmentally friendly compound and a substitutive intermediate for highly toxic phosgene or dimethyl sulfate in carbonylation and methylation reactions as well as a promising octane booster. The common methods for its preparation are the oxidative carbonylation of methanol catalyzed by a variety of transition metal ions and the transesterification of ethylene carbonate or propene carbonate with methanol[1]. The direct synthesis of DMC from carbon dioxide and methanol is a challenging route in which the most abundant carbon resources and a main greenhouse gas is used as feedstock. A new method for the direct synthesis of DMC catalyzed by the methoxide of main group metal has attracted more and more attention since it was reported[2～6] . However the lower conversion of the reaction has become the main obstacle for its application. In this letter, an efficient promoter for the direct synthesis of DMC is reported.

关键词： iodomethane promoter carbon dioxide methanol metal methoxide dimethylcarbonate