A5102806151- Magnetic Properties of Alloys
- Solid State Laser Technologies
- Advanced Fiber Laser Technologies
- Magnetic properties of thin films
- Magnetic Properties and Applications
- Laser-Matter Interactions and Applications
- Rare-earth and actinide compounds
- Photorefractive and Nonlinear Optics
- Hydrogen Storage and Materials
- Magnetic and transport properties of perovskites and related materials
- Advanced Fiber Optic Sensors
- Superconducting Materials and Applications
- Concrete Corrosion and Durability
- Metallic Glasses and Amorphous Alloys
- Corrosion Behavior and Inhibition
- Electric Motor Design and Analysis
- Vacuum and Plasma Arcs
- Hydrogen embrittlement and corrosion behaviors in metals
- Diamond and Carbon-based Materials Research
- High-Voltage Power Transmission Systems
- Infrared Target Detection Methodologies
- Optical properties and cooling technologies in crystalline materials
- Advanced Measurement and Metrology Techniques
- Ocular and Laser Science Research
- Luminescence Properties of Advanced Materials
Shandong University
2003-2022
Shaanxi Research Design Institute of Petroleum and Chemical Industry
2022
Shaanxi Yanchang Petroleum (China)
2022
Advanced Materials Corporation (United States)
1986
A room-temperature highly efficient Tm:YAP laser pumped MgO:PPLN optical parametric oscillator operating at 3.87 µm near degeneracy is demonstrated. The pump source an acousto-optical (AO) Q-switched laser, which delivers a maximum output power of 6.17 W with pulse duration 45 ns and repetition rate 6 kHz. temperature dependent wavelength tuning characteristics the PPLN-OPO investigated, OPO 1.2 around achieved 35°C, corresponding to optical-optical conversion efficiency 19.4%. To best our...
Nanocomposite R2(Fe,Co,Nb)14B/(Fe,Co) (R=Nd, Pr) magnets prepared by crystallizing the as-made R8(Fe,Co,Nb)86B6 amorphous melt-spun ribbons have been studied. The coercivity is found to depend mainly on grain size of soft phase which very sensitive sample composition. average about 30 nm in R8Fe86B6, but microstructure not homogeneous and there are several large α-Fe grains with sizes up 50–100 nm. coercivities 3.3 kOe Nd8Fe86B6 4.9 Pr8Fe86B6 samples. Nb substitution significantly reduces...
The materials studied here include SmCo5, GdCo5, Sm2TM17, Gd2TM17, Nd9.4Pr4.6Fe80B6, Alnico, SrFe12O19, and PtCo (TM=transition metal). For the first time, thermal expansion data α(⊥) α(∥) for eight from as low −180 °C to high 1250 have been reported. is coefficient in base plane c axis. All anisotropic tested show anisotropy (TEA). degree of TEA defined γ=α(⊥)/α(∥). γ has observed be related magnetocrystalline field HA. SmCo5 highest HA (350 kOe) (2.5). anomaly with a changing slope near Tc...
The formation of metastable Pr/sub 2/Fe/sub 23/B/sub 3/ phase and its effect on magnetic properties melt-spun 9/Fe/sub 91-x/B/sub x/ (x = 4-12) have been investigated. Thermogravimetric analysis (TGA) X-ray diffraction (XRD) studies show that the samples consist 14/B /spl alpha/-Fe phases at low B content, 14/B, Fe/sub 3/B high content. appears in intermediate content (8-12 at%). This results a poor squareness demagnetization curve is detrimental to hard properties. Transmission electron...
Substitution of cobalt for iron increases the Curie temperature (T <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">c</inf> ) NdFeB alloy but anisotropy field (H xmlns:xlink="http://www.w3.org/1999/xlink">A</inf> and intrinsic coercivity force xmlns:xlink="http://www.w3.org/1999/xlink">ci</inf> was found to decrease rapidly [1]. Aluminum be effective in increasing H NdFeCoB alloys. However, aluminum decreases saturation magnetization (M...
The performance of a diode-pumped passively Q-switched Nd:YAG ceramic laser at 1123 nm with Cr4+:YAG saturable absorber was demonstrated for the first time to best our knowledge. When pump power 11.2 W, average output 0.8 W obtained, corresponding optical conversion efficiency 7.1% and slope 7.5%. minimum pulse width 8 ns repetition rate 116 kHz, which attained 1% coupler W.
In this paper, gold nano-triangles (GNTs) were used as saturable absorbers (SAs) in a dual-wavelength Nd:GYSGG laser for the first time, to our best knowledge. The maximum average output power was 75 mW with shortest pulse width of 374 ns at repetition rates 250 kHz, corresponding single energy 300 nJ. operated dual wavelengths 1059.6 and 1062.4 nm under pump 8.5 W. Our work demonstrated that GNTs are promising SAs Q-switching solid state lasers.
The performance of a LD-pumped passively Q-switched Nd:GGG eye-safe laser at 1423.4 nm with Co(2+):LaMgAl(11)O(19) (Co:LMA) saturable absorber is demonstrated. A maximum average output power 627 mW an optical-to-optical efficiency 3.35% and slope 5.1% was obtained under pump 18.7 W. minimum pulsewidth 102 ns pulse repetition rate 35 kHz were the T=1.0% coupler.
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Exchange spring magnet particles of Nd2(FeCo)14B∕α-FeCo were prepared by spark erosion. X-ray diffraction and Mössbauer studies showed that the are composed about ∼85vol% Nd2(FeCo)14B ∼13vol% α-FeCo with negligible other phases. No oxide was found in these particles. Transmission electron micrographs indicated grain sizes phases ∼10–50nm, compatible effective exchange coupling between hard soft The intergrain also observed ΔM measurements.
An electro-optically (EO) $Q$Q-switched Tm:YAP laser with high peak power was demonstrated based on a ${{\rm La}_3}{{\rm Ga}_5}{{\rm SiO}_{14}}$La3Ga5SiO14 (LGS) crystal. The EO modulator operated in pulse-on mode driven by 1/4 wave voltage of 2400 V, which the lowest designed for LGS-based modulators at 2 µm, to best our knowledge. At repetition rate 200 Hz, maximum single-pulse energy 3.15 mJ obtained minimum pulse duration 17 ns, corresponding as 185.3 kW.
Temperature compensation for the induction of NdFeB type magnets has been investigated. A computer assisted alloy selection method was adopted to identify composition zero temperature coefficient over -50 200°C. Selected alloys were processed into magnet by conventional powder metallurgy method. The experimental on sintered correlated with prediction satisfactory. Holmium is an essential ingredient required magnets. magnet, (Nd <inf xmlns:mml="http://www.w3.org/1998/Math/MathML"...
The study of the electrochemical corrosion behavior on both 20# and L245NS steels were conducted in CO2-saturated simulated oilfield solution with trace amounts H2S at 25oC 45oC by potentiodynamic polarization curve, EIS SEM medthods. parameters measured Nyquist plots fitted ZView software theoretically analyzed discussed. results indicated that potential (Ecorr) became more negative current density (icorr) decreased addition 0.1wt.% Na2S·9H2O. At 45oC, Warburg impedance characteristics...
A high-power passively Q-switched Nd:YAG laser operating at 1112 nm with Cr4+:YAG as a saturable absorber is demonstrated. Under 808 diode-direct pumping, the maximum average output power of 2.73 W achieved pump 16.65 W, corresponding to an optical-to-optical conversion efficiency 16.4%. At same time, pulse width, repetition rate, single energy and peak are 27.2 ns, 9 kHz, 303.3 μJ 11.2 kW, respectively. As far we know, result gives highest generated by diode-end-pumped laser.