>97% W and Mo is absorbed with D354 at pH=3 and contact time 40min. And the saturated absorbing capacity from W/Mo coadsorption can reach 0.238 mol/ml wet resin.
Compared with TiO2 infrared spectrum, the Ti-O stretching vibration of TiO2>/SnO2 moved from 500 to 656 cm-1 , and had 560 cm-1 shoulder peak. The intensity of the peaks near 1 650 and 3 420 cm-1 corresponding to water absorbing peaks increased.
The autor raises that MnO_2 is added into solution absorbing Fe~(2+). This method has the advantage of low MnO_2 ore fines consumption and of a few impurity on neutral character solution.
The touching angle and absorbing heat between wollastanite particle and PVAC emulsion are tested. The results indicate that the wetting property of the treated wollastanite particles is obviously increased and -3.36×10\+2 J·mol\+ -1 of absorbing heat are released.
测定了硅灰石微粒与聚醋酸乙烯乳液( P V A C乳液)的接触角及吸附热Δ Ha,结果表明:处理后的硅灰石微粒润湿性能显著增强,放出的吸附热为- 3.36×102 J·m ol- 1。
This paper considers how to find some joint distributions and their marginal distributions of crossing time and renewal numbers related to two PH-renewal processes by constructing an absorbing Markov process.
Discrete singular convolution method with perfectly matched absorbing layers for the wave scattering by periodic structures
Absorbing water from soil by roots in vascular plants is an important physiological function and plays an essential role on their water balance.
Results showed that compared with farmland watersheds, runoff generation time in forest watersheds was delayed remarkably, and peak flow was reduced greatly, which indicates that vegetation played an important role in holding and absorbing rainfall.
The contents of the tested microelements in soil fauna had significant correlations with their environmental background values, litter decomposition rate, food habit of soil fauna, and its absorbing selectively and enrichment to microelements.
The Fe~(2+), Fe~(3+)-doped vycor was obtained by inpregnated the porous glass with a so-lution containing ferro-ions and then hydrated and consolidated under reducing condition.This glass has some special properties in infrared and ultraviolet absorption, that is, the transmittance at 1.1 μ is 5%, at visible region is about 80% and at wave length lessthan 0.33μ is completely cut off (for 0.76% ferro-containing sample, 4.5 mm thickness).The chemical durability and thermal shock resistance are almost the same...
The Fe~(2+), Fe~(3+)-doped vycor was obtained by inpregnated the porous glass with a so-lution containing ferro-ions and then hydrated and consolidated under reducing condition.This glass has some special properties in infrared and ultraviolet absorption, that is, the transmittance at 1.1 μ is 5%, at visible region is about 80% and at wave length lessthan 0.33μ is completely cut off (for 0.76% ferro-containing sample, 4.5 mm thickness).The chemical durability and thermal shock resistance are almost the same as that of si-lica glass. Besides, the softening point of this glass is higher than 1400℃, the coefficientof linear expansion is about 8.6×10~(-7). This glass can absorb the infrared and ultravioletregions which are harmful to human body and so it may be used as an absorbent of in-frared and ultraviolet for certain light sources. This paper investigated and discussed the technology of fabrication and some physicaland chemical phenomena during fabrication, such as mechanism of ferric reduction,light absorption and crystallization of the glass.
The strength data of Nasicon (Na_3Zr_2Si_2PO_(12)) ceramics as measured on ring specimensfit well to the Weibull distribution with a modulus of 3.2.The mean strength of the cera-mics is 107 MN/m~2,which lies between the three point and four point bending strengthes, theformer being 15% lower than the latter. The strength of Na_3Zr_2Si_2PO_(12) ceramics varies asa reciprocal linear function of the square root of the length of Knoop's indentation, orequivalently of the square root of the grain size. The toughness...
The strength data of Nasicon (Na_3Zr_2Si_2PO_(12)) ceramics as measured on ring specimensfit well to the Weibull distribution with a modulus of 3.2.The mean strength of the cera-mics is 107 MN/m~2,which lies between the three point and four point bending strengthes, theformer being 15% lower than the latter. The strength of Na_3Zr_2Si_2PO_(12) ceramics varies asa reciprocal linear function of the square root of the length of Knoop's indentation, orequivalently of the square root of the grain size. The toughness parameter K_(1c) of undopedNasicon ceramics is 2.04 MN/m~(3/2). It increases with doped ZrO_2 up to 3 mole%, but thestrength changes rather insignificantly. As the doped content of ZrO_2 increases further,both the strength and K_(1c) decreases.When the doped ZrO_2 increases to more than 5 mole%,the electrical resistivity begins to rise obviously from a value of about 3.5 Ω·cm, Theseresults support the view point that the change of mechanical properties results from theenergy absorbing small matrix microcracks which are formed by the expansion of ZrO_2during the tetragonal-monoclinic transformation, whereas the applied stress may addition-ally affects the process of phase transformation.
This paper describes a series of glasses colored by lead compounds of S, Se, Te.Theseglasse can absorb the entire visible spectrum and show steep rise in transmission atwave lengths of 0.7~2.5μm in the near infrared region. It is observed that the forbidden band gaps of some semiconductors in glass are closeto those of corresponding crystals, and the location of frontage absorption of glass isdetermined by the energy required for the transition of electrons from valence band toconduction band. Glasses...
This paper describes a series of glasses colored by lead compounds of S, Se, Te.Theseglasse can absorb the entire visible spectrum and show steep rise in transmission atwave lengths of 0.7~2.5μm in the near infrared region. It is observed that the forbidden band gaps of some semiconductors in glass are closeto those of corresponding crystals, and the location of frontage absorption of glass isdetermined by the energy required for the transition of electrons from valence band toconduction band. Glasses with steep frontage at various wave lengthes in the near infraredregion are obtained by introducing PbX semiconductors into the glasses. During the process of heat treatment,the lead and cadmium chalcogenides in the glassform continuous solid solutions of which the forbidden band gaps are determined by com-positions of the aggregations just as in mixed crystals.