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Defence Technology（防务技术） 2021年第4期17卷 1471-1485页

作者： Teng Chen Yi-wen Hu Cai Zhang zhao-jian gao School of Material and Chemical Engineering Xuzhou University of TechnologyXuzhouJiangsuPR China Xi’an Modern Chemistry Research Institute Xi’anShaanxiPR China Xuzhou University of Technology XuzhouJiangsuPR China

As a main oxidizer in solid composite propellants,ammonium perchlorate(AP)plays an important role because its thermal decomposition behavior has a direct influence on the characteristic of solid composite *** improve the performance of solid composite propellant,it is necessary to take measures to modify the thermal decomposition behavior of *** recent years,transition metal oxides and carbon-supported transition metal oxides have drawn considerable attention due to their extraordinary catalytic *** this review,we highlight strategies to enhance the thermal decomposition of AP by tuning morphology,varying the types of metal ion,and coupling with carbon *** enhanced catalytic performance can be ascribed to synergistic effect,increased surface area,more exposed active sites,and accelerated electron transportation and so *** mechanism of AP decomposition mixed with catalyst has also been briefly ***,a conclusive outlook and possible research directions are suggested to address challenges such as lacking practical application in actual formulation of solid composite propellant and batch manufacturing.

关键词： Transition metal oxides Carbon-supported transition metal oxides Catalyst Ammonium perchlorate Thermal decomposition

A NEW PERMANENT MAGNETIC MATERIALS CRYSTALLIZED FROM AMORPHOUS Co_(84-x)BxZr_(16) ALLOYS

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Chinese Physics Letters 1990年第8期7卷 365-368页

作者： SHEN Baogen GUO Huiqun YANG Linyuan zhao jian gao Magnetism Laboratory Institute of PhysicsAcademia SinicaBeijing 100080 CCAST(World Laboratory) Beijing

The crystallization of amorphous Co_(84-x)BxZr_(16) alloys and the influence of heat treatment on its hard magnetic properties are *** dependence of B-content on crystallization temperature of the samples is determined from differential scanning calorimetric(DSC)*** intrinsic coercivities iHc are found to increase with increasing annealing temperature and go through a mazimum then to lower values.A coercivity of 2.7kOe and an energy product of 4.0MGOe are obtained at room temperature in Co_(82)B_(2)Zr_(16) alloy annealed at 660°C for a short *** alloys would be expected as an applicable mate rid for permanent magnet.

关键词： alloys alloy

Negative Magnetoresistance Effect in La-Pb-Mn-O Bulk Manganese Oxides

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Chinese Physics Letters 1996年第2期13卷 129-132页

作者： zhao Tong-yun LI Min zhao Xue-gen WANG Fang-wei LI Yun-fei SHEN Bao-gen zhao jian-gao State Key Laboratory of Magnetism Institute of PhysicsAcademia SinicaBeijing 100080

The structure,inagnetic and magnetotransport properties of La_(1-x),Pb_(x) MnO bulk manganese oxides prepared by the standard ceramic techniques were investigated by XRD,VSM,ESM and MR *** sintering condition and the hole doped concentration x have a strong iniluence&n the magnetic properties and niagnetore-sistance *** maximum MR,20%at room temperature under a field of 2 T, was obtained for x=0.4 and the sintered temperature T_(3)=1260℃.The correlation among the structure,magnetic and MR is discussed.

关键词： resistance effect structure

Magnetic Anisotropy in the Radula of Chiton

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Chinese Physics Letters 2000年第7期17卷 542-543页

作者： zhao jian-gao QIAN Xia LIU Wei LIU Chuan-lin Zhan Wen-Shan State Key Laboratory of Magnetism Institute of PhysicsChinese Academy of SciencesBeijing 100080 Department of Bio-chemistry Yantai UniversityYantai 264005

Radular teeth of chitons were studied by using magnetic torque-meter and transmission electron microscopy (TEM). The magnetic torque curves give clear evidence of presence of strong uni-axial magnetic anisotropy. The easy axis is along the length direction of tongue-like radula. The TEM pattern shows that long chip-like magnetite nano-scaled particles packed in the radular teeth with both uni-axial shape anisotropy and magneto-crystalline anisotropy.

关键词： axial magnetic packed

Low Coercivity of Amorphous La-Co Films

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Chinese Physics Letters 1997年第12期14卷 943-945页

作者： zhao Tong-yun zhao jian-gao SHEN Bao-gen SHAN Zheng-sheng D.J.Sellmyer State Key Laboratory for Magnetism Institute of PhysicsChinese Academy of SciencesBeijing 100080 Behlen Laboratory of Physics and Center for Materials Research and AnaJysis University of NebraskaLincolnNE 68588-0113

The structure and magnetic properties of sputtered La-Co alloy films have been *** than 10A/m(100mOe)coercivity can be obtained in amorphous La_(100-x)Co_(x) films around x=80 and the coercivity of amorphous La^(20)Co_(80) film depends on the thickness of the *** magnetization behaviour has been examined for the films with different compositions through magnetic hysteresis *** excellent rectangular magnetic hysteresis loop was obtained for films with thickness less than 60nm.

关键词： alloy hysteresis amorphous

Grain Size and Photocatalytic Activity of Nanometer TiO_2 Thin Films Prepared by the Sol-gel Method

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Journal of Wuhan University of Technology(Materials Science) 2001年第2期16卷 1-5页

作者：余家国 SKLATMSP Wuhan University of Technololgy Wuhan 430070 China

Transparent anatase TiO2 nanometer thin films with photocatalytic activity were prepared via the sol-gel method on soda-lime glass. The thickness , crystalline phase, grain size, surface hydroxyl amount and so on were characterized by scanning electron microscopy (SEM) , X-ray diffraction (XRD), transmission electron microscopy ( TEM), X-ray photoelectron spectroscopy (XPS) and UV-visible spectrophotometer ( UV-VIS). The photocatalytic activity of TiO2 thin films was evaluated for the photocatalytic decolorization of aqueous methyl orange . The effects of film thickness on the crystalline phase, grain size, transmittance and photocatalytic activity of nanometer Ti02 thin films were discussed.

关键词： sol-gel method titania thin films grain size photocatalytic activity

MAGNETIC PROPERTIES OF MELT-SPUN (Nd-Fe)-B ALLOYS

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Chinese Physics Letters 1985年第4期2卷 169-172页

作者： zhao jian-gao SHEN Bao-gen ZHAN Wen-shan Institute of Physics Academia ScinicaBeijing

The magnetic properties of melt-spun(Fe_(1-x)Nd_(x))_(94)B_(6) alloys(x=0.07-0.90)are *** spontaneous magnetizations are interpreted on the basis of a sperimagnetic structure with Nd and Fe *** highest coercivity at r... 详细信息

关键词： alloy alloys magnetic

Giant Magneto-impedance Effect in Nanocrystalline Fe_(73.5)CuNb_(3)Si_(13.5)B_(9) Ribbons

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Chinese Physics Letters 1996年第12期13卷 927-930页

作者： CHEN Chen GUO Hui-qun zhao Tong-yun LI Min LUAN Kai-zheng SHEN Bao-gen LIU Yi-hua zhao jian-gao MELiang-mo State Key Laboratory of Magnetism Institute of Physics&Center of Condensed Matter PhysicsChinese Academy of SciencesBeijing 100080 Department of Physics Shandong UniversityJi’nan 250100

Magneto-impedance(MI)effects have been observed in amorphous and nanocrystalline Fe_(73.5)CuNb_(3)Si_(13.5)B_(9) *** MI values have been obtained in nanocrystalline samples(NCS),but not in as-quenched samples(AQS).The magnetic responses of impedance of nanocrystalline samples share some common features with that of Co-based amorphous wire and ribbon *** field dependencies of effective permeability for nanocrystalline samples have shown a sharp change at the anisotropy *** effective permeability and the hysteresis loops for AQS and NCS have been shown to be responsible for their MI *** sensitivity of the magnetic responses in the nanocrystalline sample can reach 50%/Oe.

关键词： impedance amorphous hysteresis

THE EFFECT OF HEAT TREATMENT ON HARD MAGNETIC PROPERTIES OF AMORPHOUS Fe_(78)Nd_(16)B_(6) ALLOY

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Chinese Physics Letters 1985年第7期2卷 301-304页

作者： SHEN Bao-gen zhao jian-gao ZHAN Wen-shan Institute of Physics Academia SinicaBeijing

High field magnetization and thermomagnetic effects in the as-quenched and heat treated Fe_(78)Nd_(16)B_(6) alloys at different annealing temperatures and time are *** are two Curie temperatures to the as-quenched *** temperature dependence of coercivity shows a maximum at around 180K for the as-quenched and heat treated samples.A coercive field of 14.8kOe and an energy product of 10MGOe are obtained at romm temperature by annealing at 600℃for *** of magnetic anomaly at lower temperature have also been carried out.

关键词： alloys annealing

MAGNETIC MOMENT AND CURIE TEMPERATURE OF AMORPHOUS Fe_(90-x)Co_(x)Zr_(10) ALLOYS

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Chinese Physics Letters 1985年第2期2卷 75-78页

作者： SHEN Bao-gen ZHAN Wen-shan zhao jian-gao ZHENG Xiao-nian Institute of Physics Academia SinicaBeijing

The magnetic moments and Curie temperatures of amorphous Fe_(90-x)Co_(x)Zr_(10)(0cxc90)alloys have been measured *** x c30,the great enhancement of the magnetic moment is explained by the increase of magnetic moment of iron atoms and the existence of two magnetic regions,while the increase of the Curie temperature with Co content is interpreted by the interactions of Fe-Co atoms which will be larger than that of Fe-Fe and Co-Co.

关键词： alloys magnetic