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with the development of electronic information technology, the heating problem in microwave components is becoming more and more important. Reducing dielectric loss is an effective way to reduce component heat. Bi1−xYxFeO3 (x=0.02, 0.04, 0.06, 0.08) ceramics were synthesized by traditional state solid method, and the effects of Y3+ ions on magnetic and dielectric properties were studied. The XRD results...
Magnetic and dielectric properties of multiferroic (1−x)BiFeO3−xBaFe12O19 (x=0.03, 0.05, 0.07, 0.09 wt%) solid solution synthesized by state solid were investigated. Morphology of the sample is determined by SEM, indicating that the grain has been shrink, and all samples have been irregular. With increasing of BaFe12O19, saturation magnetization increased from 0.07 to 0.7 emu/g, and coercivity increased...
Bi1−xLixFeO3 (x=0, 0.05, 0.10, 0.15) ceramics were synthesized by conventional solid-sate reaction method. The effect of Li1+ doping on phase structure, morphological and impedance properties of Bi1−xLixFeO3 ceramics was performed. DSC studied the synthesis process of pure BiFeO3 sample and confirmed synthesis temperature was about 825 °C. X-ray diffraction dates showed that Bi1−xLixFeO3 were stabilized...
In order to finding the reason why there is no output signal when the voltage signals inputted during the voltage stabilizing circuit module works, Scanning electron microscope and energy disperse spectroscopy were used to detecting the surface morphology and the internal composition. The analysis results show that it is the cold solder in the wire bonding caused by the inappropriate mounting depression...
The results of small size copper sample tested by energy dispersive spectrometer were analyzed in the method of the orthogonal experiment. By the method of variance analysis to study the effects of the accelerating voltage, working distance, magnification times and collection time on the element content, we determined that the preferred experimental conditions were set at the accelerating voltage...
X-ray fluorescence analyze, the milliohm meter and X-ray energy dispersive spectrometer were used to investigate the impurities and electric resistance of the copper wire. By the polishing and corrosion testing, the different grain sizes were observed by scanning electron microscopy. The impurities can effect on the hardness and electrical conductivity of the copper wire. The grain size also affects...
In this work, effects of long-term high temperature services on surface micro-structures and components of SmCo magnets with Ni coating were studied. The magnets have been serviced at 550 °C in air (0∼5000 h). And the laws of the surface degradation were studied. And the characters of surface micro-structures and composition were observed by SEM, EDS, and XRD.
In this paper, based on the results of SEM and EDS analysis, there are two main reasons for Silicon-aluminum alloy cavity leakage. First, silicon-aluminum alloy material is unqualified; second, it produces cracks and pores during laser welding defects. In the test, silicon-aluminum alloy material is manufactured by powder metallurgy. It is pressure-type is not dense. In the uneven distribution of...
As support materials of integrated circuits, lead frame is the key structural components to the formation of the electrical circuits, played a role in the internal and external wire connections. As one of the commonly used lead frames at present, 5–8µm copper plating layer above of FeNi42 alloy often been found deep red color after chip welding. Aiming at this phenomenon, this paper collected large...
In this paper, based on the results of SEM and EDS analysis, I would like to share the discovery of MLCC failure due to insulation resistance. For external factors, The defects which caused by mechanical stress can lead to lack of insulation resistance. For the intrinsic factors, MLCC insulation resistance failure is due to the presence of defects, and the main defects include void in ceramic dielectric...
Regarding the effects caused by power and time of 7476D semi-automatic bonding wire on surface of ceramic substrate wedge bonding wire performances. Orthogonal experiment named L9(34) had been designed using bonding power and bonding time to get results of pull test as the test index. After processing and analysis of test data using Statistical Package for Social Science 16.0 (SPSS16.0) software,...
With This paper studies the effect to the result of energy spectrum analysis by the magnetic specimen. The electron beam and the interaction between electronics and solid in magnetic field had been discussed, and the escape depth of two elements' characteristic X-ray had been calculated. From the above that the mechanism and principle of this specimen's energy spectrum analysis result of error had...
(****)Aimed at the unstable output phenomenon of one type of power amplifier in the process of using, previous examinations have located the problem in internal inductance coil. To determine the reason of the fault amplifier, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) have been used to analyze the microstructure and composition of abnormal substances in the bend of...
With the increasing using temperature, the magnetic performance of high temperature stable Sm2Co17 type permanent magnet will be decreased. In order to explore the effect of the high temperature on microstructure of the alloy, the differential thermal analysis (DTA) was made and three distinct phase transformation temperature 254 °C, 342 °C and 540 °C were obtained. Then X-ray diffraction (XRD), scanning...
Based on the phenomenon that a large number of spots appear in the type area on the surface of the gold-plated kovar alloy cavity, combined with scanning electron microscope (SEM) and energy disperse spectroscopy (EDS) analysis method, this paper analyzed the causes of spots and promoted effective encapsulation of electronic components. The result shows that uneven laser typing edge affect the smoothness...
Based on the phenomenon that a large number of spots appear in the type area on the surface of the gold-plated kovar alloy cavity, combined with scanning electron microscope (SEM) and energy disperse spectroscopy (EDS) analysis method, this paper analyzed the causes of spots and promoted effective encapsulation of electronic components. The result shows that uneven laser typing edge affect the smoothness...
With the increasing using temperature, the magnetic performance of high temperature stable Sm2Co17 type permanent magnet will be decreased. In order to explore the effect of the high temperature on microstructure of the alloy, the differential thermal analysis (DTA) was made and three distinct phase transformation temperature 254 °C, 342 °C and 540 °C were obtained. Then X-ray diffraction (XRD), scanning...
With This paper studies the effect to the result of energy spectrum analysis by the magnetic specimen. The electron beam and the interaction between electronics and solid in magnetic field had been discussed, and the escape depth of two elements' characteristic X-ray had been calculated. From the above that the mechanism and principle of this specimen's energy spectrum analysis result of error had...
(****)Aimed at the unstable output phenomenon of one type of power amplifier in the process of using, previous examinations have located the problem in internal inductance coil. To determine the reason of the fault amplifier, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) have been used to analyze the microstructure and composition of abnormal substances in the bend of...
DuPont1187 was frequently used as a palatable silver termination in the multilayer ceramic capacitor (MLCC). A phenomenon occurred on the palatable silver termination, which cladding material had poor connation with the sliver termination of MLCC and the failure of weld ability after aging. Base on different sintering conditions (different sintering temperature, bearing of sintering and stove environment),...
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