effects of la2o3 on crystallization microstructure and
The Effect of La2O3 Addition on Sol–Gel Derived
Mar 17 2014 · Monophasic gel with stoichiometric 3Al 2 O 3 ·2SiO 2 composition and gels with 0.99 1.96 and 2.91 mol La 2 O 3 added were sol–gel derived. The crystallization path structure evolution microstructure and morphology of calcined premullite powders and sintered ceramic bodies have been investigated as a function of La 2 O 3 content and sintering temperature.
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Effects of La2O3 on the microstructure and piezoelectric
Abstract. The effects of La 2 O 3 doping on sintering characteristics and electric properties were studied. Dense fine-grained ceramics were obtained by La 2 O 3 doping which reduced grain boundary mobility and suppressed rapid grain growth induced by the phase transformation from the low-to high-temperature forms. The dielectric and frequency constants were increased as the La 2 O 3 content
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Effects of Y2O3 and La2O3 addition on the crystallization
Effects of adding Y2O3 and La2O3 on the crystallization of β-quartz solid solution (ss) and the subsequent β-quartz ss to β-spodumene transformation of Li2O·Al2O3·4SiO2 glass-ceramic were investigated. Adding ≥ 4 mol YO3/2 or 8 mol LaO3/2 effectively improved the control of the crystallization process of the glass.
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Effects of La2O3 on Crystallization Microstructure and
The effects of MgO on crystallization microstructure and dielectric properties of the material were investigated by differential scanning calorimeter(DSC) X-ray diffraction (XRD) scanning
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Effect of BaO Addition on Crystallization Microstructure
This work presents the processing and the characterization of diopside–Ca‐Tschermak clinopyroxene‐based glass–ceramics (GCs) where partial (i.e. 5 10 and 20 ) substitution of Ba for Ca was attempted in the composition of CaMg 0.8 Al 0.4 Si 1.8 O 6.Sintering crystallization microstructure and properties of the new materials were investigated under different heat‐treatment
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Effect of Crystallization Kinetics on Microstructure and
Oct 12 2012 · We have examined the effects of crystallization kinetics of poly(3‐hexylthiophene) and poly 2 5‐bis(3‐hexadecylthiophen‐2‐yl)thieno(3 2‐b)thiophene on microstructure and charge transport. Rapid crystallization increases the density of tie molecules in polythiophenes.
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Effect of Crystallization Kinetics on Microstructure and
Oct 12 2012 · We have examined the effects of crystallization kinetics of poly(3‐hexylthiophene) and poly 2 5‐bis(3‐hexadecylthiophen‐2‐yl)thieno(3 2‐b)thiophene on microstructure and charge transport. Rapid crystallization increases the density of tie molecules in polythiophenes.
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Effect of Al2O3 Content on Crystallization Behavior
Effect of Al 2 O 3 Content on Crystallization Behavior Microstructure and Mechanical Properties of SiO 2 –Al 2 O 3 –CaO–MgO Glass–Ceramics Neda Keyvani Department of Materials Ceramics Division Iran University of Science Technology Narmak Tehran 16844 Iran
Chat OnlineEffect of MnO on the crystallization microstructure and
The Mn-doped MgO-Al2O3-SiO2 (MAS) glass-ceramics were prepared by the melt quenching technique. The effect of MnO on the crystallization microstructure and properties of MAS was discussed. XRD results showed that MnO promotes the phase transformation from indialite to Mg0.6Al1.2Si1.8O6 and enstatite. Crystallization kinetics suggested that MnO inhibits the precipitation of indialite.
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Effect of La2O3 Nanoparticles on the Brazeability
Jun 20 2016 · Read "Effect of La2O3 Nanoparticles on the Brazeability Microstructure and Mechanical Properties of Al-11Si-20Cu Alloy Journal of Materials Engineering and Performance" on DeepDyve the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
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The Effect of La2O3 Addition on Sol–Gel Derived
Mar 17 2014 · Monophasic gel with stoichiometric 3Al 2 O 3 ·2SiO 2 composition and gels with 0.99 1.96 and 2.91 mol La 2 O 3 added were sol–gel derived. The crystallization path structure evolution microstructure and morphology of calcined premullite powders and sintered ceramic bodies have been investigated as a function of La 2 O 3 content and sintering temperature.
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Effects of Glycerol and Tween 60 on the Crystallization
Oct 02 2003 · The addition of 0.10 glycerol or Tween 60 increased the yield force of a 70 30 (w/w) mixture of triolein/HMF (high-melting fraction of milkfat) at 5 °C. Further increases in glycerol or Tween 60 caused a decrease in yield force. Solid fat content (SFC) versus time profiles at 30 °C (glycerol) and 28 °C (Tween 60) allowed for the determination of Avrami rate constants of crystallization (k
Chat OnlineEffect of La2O3 on Microstructure and Transmittance of
Feb 01 2006 · It was reported that alumina ceramics codoped with MgO and Y2O3 can enhance the transmit- tance effectively" . In this paper the effect of La203 on microstructure and transmittance of alumina ceramics was investigated. 1 Experimental Transparent alumina ceramics were fabricated by conventional sintering process in H2 atmosphere.
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Effect of La2O3 on Microstructure and Thermal
materials Article E ect of La2O3 on Microstructure and Thermal Conductivity of La2O3-Doped YSZ Coatings Xiaojie Guo 1 Chucheng Lin 1 Jimei Zhang 1 Ziwei Liu 1 Caifen Jiang 1 Wei Zheng 1 and Yi Zeng 1 2 1 The State Key Lab of High-performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China
Chat OnlineEffect of Neodymium on the Crystallization Microstructure
The effect of single coloring agent Nd(NO3)3 on the crystallization microstructure and colorization of Li2O-Al2O3-SiO2 (LAS) glass ceramics were investigated by differential thermal analysis (DTA) X-ray diffractometry (XRD) and scan- ning electron microscopy (SEM). The introduction of little neodymium has no effect on the crystallization
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Effect of La2O3 addition on the structural and magnetic
Effect of La2O3 addition on the structural and magnetic properties of strontium ferrites
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Effects of La2O3/ZnO Additives on Microstructure And
Dielectric ceramics of Zr 0.8 Sn 0.2 TiO 4 containing La 2 O 3 and ZnO as sintering aids were prepared and investigated for microstructure and microwave dielectric properties. Low‐level doping with La 2 O 3 and ZnO (up to 0.30 wt ) is good for densification and dielectric properties. These additives do not affect the dielectric constant and the temperature coefficient.
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Effect of freeze-drying parameters on the microstructure
Jun 20 2017 · Nanofibrillated cellulose aerogels are low-density bio-based materials that present a great potential in several fields. The properties of aerogels are a consequence of their microstructure. The understanding and control of the structure is therefore a priority for the preparation of aerogels with specific properties. This study aims at investigating how freeze-drying conditions affect the
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Effects of La2O3 on Microstructure and Properties of Laser
The effects of La 2 O 3 contents on microstructure and properties of the coatings were investigated. The results showed that the coating mainly consisted of amorphous Fe 3 P and Fe 2 Si phases. A small amount of La 2 O 3 addition could inhibit the epitaxial growth and refine the dendrite crystals.
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Effect of La2O3 addition on the structural and magnetic
Effect of La2O3 addition on the structural and magnetic properties of strontium ferrites
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Effect of La2O3 on Microstructure and Thermal Conductivity
Effect of La2O3 on Microstructure and Thermal Conductivity of La2O3-Doped YSZ Coatings
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Phase separation and crystallization of La2O3 doped ZnO
In order to investigate the effect of the La2O3 on the phase separation and crystallization of ZnO-B2O3-SiO2 glass after the occurence of the phase separation and crystallization of glasses by heat treatment the microstructure morphology and distribution of elements in different sample areas were characterized by the scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS
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Effect of Crystallization on Microstructure and Elution
May 15 2017 · Effects of cooling conditions on phase and microstructure in copper slag were studied. X-ray analysis of water-quenched slag shows noncrystalline FeO-rich silicate phase spherical copper loss particles and a trace of crystalline phase. The slowly cooled slag in a furnace showed mainly fayalite and magnetite phases and SiO 2 -rich (>65 mol
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Effects of La2O3 on the microstructure and piezoelectric
Abstract. The effects of La 2 O 3 doping on sintering characteristics and electric properties were studied. Dense fine-grained ceramics were obtained by La 2 O 3 doping which reduced grain boundary mobility and suppressed rapid grain growth induced by the phase transformation from the low-to high-temperature forms. The dielectric and frequency constants were increased as the La 2 O 3 content
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Effect of La2O3 on the Microstructure and Electrical
(Ti Sn)O2 varistors doped with different amount of La2O3 were obtained by ceramic sintering processing at 1250 . The effect of La2O3 on the microstructure and nonlinear electrical behavior of the (Ti Sn)O2 ceramics were investigated. The ceramics have nonlinear coefficients of α=6.2–8.5. Experimental evidence shows that small quantities of La2O3 improve the nonlinear properties of the
Chat OnlineThe effect of lanthanum oxide (La2O3) on the structure and
The addition of La 2 O 3 did not change the crystal structure and nucleation process for PVDF but it decreased markedly the crystal growth rate and led to the formation of unstable crystals. This was attributed to the fact that too much La 2 O 3 prevented PVDF molecular chains from moving and arranging in an orderly manner into crystals.
Chat OnlineEffects of La2O3/ZnO Additives on Microstructure And
Dielectric ceramics of Zr 0.8 Sn 0.2 TiO 4 containing La 2 O 3 and ZnO as sintering aids were prepared and investigated for microstructure and microwave dielectric properties. Low‐level doping with La 2 O 3 and ZnO (up to 0.30 wt ) is good for densification and dielectric properties. These additives do not affect the dielectric constant and the temperature coefficient.
Chat OnlineEffect of La2O3 on Microstructure and Thermal Conductivity
Enhancing the properties of thermal barrier coatings (TBCs) by doping with rare earth elements has been a hot topic for a while. La2O3 and Y2O3 co-doped ZrO2 (La-YSZ) TBCs and yttria-stabilized zirconia (YSZ) TBCs were deposited by atmospheric plasma spraying (APS) and the comprehensive effects of La3 on the microstructure and property were investigated.
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Effect of Neodymium on the Crystallization Microstructure
The effect of single coloring agent Nd(NO3)3 on the crystallization microstructure and colorization of Li2O-Al2O3-SiO2 (LAS) glass ceramics were investigated by differential thermal analysis (DTA) X-ray diffractometry (XRD) and scan- ning electron microscopy (SEM). The introduction of little neodymium has no effect on the crystallization
Chat OnlineEffect of La2O3 Addition on the Microstructure and
The effect of La2O3 addition on the microstructure and electrical properties of Mn0.75Ni1.25CuO4-xLa2O3 (0≤x≤0.3) was studied. The crystal structure phase compositions and morphology were analyzed by X-ray diffraction (XRD) scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). The sintered ceramic bodies was typical polycrystalline with cubic spinel
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