By means of x-ray diffract ometer, the authors study the structure of phase with protective coating which is agglomerated in high temperature and find that this protective coating is made up of glass phase,SiO_2, CrO_3 and pyroxenite.
The phase structure of enamel coating was mainly glass phase and a little crystalline phase (Na2MoO4(MoO3)y). The surface of coating was smooth, no cracks.
The microstructure of cylinder liner materials 90Al 2O 3 was analysed The results showed that this cylinder liner was composite ceramic of alumina and spinel, had crystal structure of Al 2O 3 Mg SiO 2 and Al 2O 3 CaO SiO 2 system High glass phase and porosity concentration will lower the ductility of the ceramic
采用宏观和微观分析方法对 90 Al2 O3 缸套内衬的微观结构进行了分析。 结果表明 ,该缸套内衬为刚玉 -镁铝尖晶石复合陶瓷 ,显微组织属 Al2 O3 - Mg O- Si O2 和 Al2 O3 - Ca O- Si O2 型结构。
Nontrivial interference develops between the subsystems when (for certain values of the parameters) they can only slide into the spin-glass phase.
It is found that a transition to the dipole-glass phase with chaotic, spontaneous unit-cell dipole moments, characterized by the Edwards-Anderson nonlocal parameter, precedes the transition to the ferroelectric phase.
The theory predicts the appearence of stable fluctuon states in both the mixed ferroelectric-dipole-glass phase (a dipole glass is the electric analog of a spin glass) and the dipole-glass state of disordered ferroelectrics.
While the former phase possesses only a trivial fixed point, this point become unstable in the latter phase, which may be interpreted as a spin glass phase.
Nematic LC to nematic glass phase transition in pores
Five phases were determined by means of quantitative EPMA, SEM, X-ray diffraction, etc. in the high Ti-slag with high Mg and Ca contents, smelted by 6000 kVA electric furnace. The principal phase is the anosovite solid solution of Ti_3O_5 type in amount of 87.06% of the slag. Along the grain interfaces of the solid solution phase, CaO concentrated mainly in the form of 2CaO·TiO_2. This is the phase area so called the crystal phase enriched Ca and Mg. Most MgO is collected in the glass phase which is about...
Five phases were determined by means of quantitative EPMA, SEM, X-ray diffraction, etc. in the high Ti-slag with high Mg and Ca contents, smelted by 6000 kVA electric furnace. The principal phase is the anosovite solid solution of Ti_3O_5 type in amount of 87.06% of the slag. Along the grain interfaces of the solid solution phase, CaO concentrated mainly in the form of 2CaO·TiO_2. This is the phase area so called the crystal phase enriched Ca and Mg. Most MgO is collected in the glass phase which is about 10.90% of the slag. Other two minor phases are found to be Ti-Fe alloy and metallic Fe. Thus, the calculated structural formula of such an anosovite in the slag seems to be: 0.15[(Mg_(0.27)Ti_(0.73))0.2TiO_2]·0.85[Ti_2O_3·TiO_2]
This paper deals with the compostion of pasty boronization of steel with protective coating. The composition which is optimized has a good result of protection, low price and wide resource. By means of x-ray diffract ometer, the authors study the structure of phase with protective coating which is agglomerated in high temperature and find that this protective coating is made up of glass phase,SiO_2, CrO_3 and pyroxenite. The soffening point of protective coating and the production of glass phase...
This paper deals with the compostion of pasty boronization of steel with protective coating. The composition which is optimized has a good result of protection, low price and wide resource. By means of x-ray diffract ometer, the authors study the structure of phase with protective coating which is agglomerated in high temperature and find that this protective coating is made up of glass phase,SiO_2, CrO_3 and pyroxenite. The soffening point of protective coating and the production of glass phase which changes with the temperature is observed by means of GX_A-high temperature physical properties instru mentation. The protective coating begins to soften about at 700℃; the glass phase begins to produce at 800℃ and remains stable until 950℃. According to the experiment ,the efficient minimal thickess of the protective coating is 1. 2 mm.
The CeO2 modified SrTiO3 ceramics were prepared by conventional ceramic process. The SrTiO3 matrix and CeO2 additive were combined in following system:SrTiO3 +x(CeO2·TiO2), where x is the weight percent , of which x (wt%)=2,5, 10, 15, 20,25, and 30. The samples were sintered at 1400℃ for an hour in air. The Ce element in SrTiO3 ceramics is used as an impurity donor. The scanning electron microscopic (SEM) analysis and X-ray diffractive examination of SrTiO3 ceramics containing CeO2 indicated that there exists...
The CeO2 modified SrTiO3 ceramics were prepared by conventional ceramic process. The SrTiO3 matrix and CeO2 additive were combined in following system:SrTiO3 +x(CeO2·TiO2), where x is the weight percent , of which x (wt%)=2,5, 10, 15, 20,25, and 30. The samples were sintered at 1400℃ for an hour in air. The Ce element in SrTiO3 ceramics is used as an impurity donor. The scanning electron microscopic (SEM) analysis and X-ray diffractive examination of SrTiO3 ceramics containing CeO2 indicated that there exists a Ce2O3 secondary phase (viz. glass phase) and it had solid solution solubility for impurities which decrease the semiconductive property of SrTiO3 ceramics , and weaken the oxidation of the surface of grain and thus increase the conductivity of the grains. The semiconducting ceramics process lightly distorted cubic structure at room temperature. This paper mainly gives a study of the conductivity of CeO2 modified SrTiO3 ceramics.
glass phase
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