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1
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Optica Applicata
EN Porous glasses are widely used in microelectronics as inter-metal dielectrics with low dielectric constant (so-called low-k dielectrics). At the same time copper is used as a metal because of its low resistivity. Combination of Cu and low-k requires a barrier to prevent Cu diffusion into a low-k die[...]
2
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Optica Applicata
EN We have presented the results of our investigation concerning adsorption in porous glass (PG). Chemical adsorption of gas molecules is due to indicator substances which were deposited from solution on the surface of pores. Physical adsorption of organic molecules is due to OH-adsorption centres whic[...]
3
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Optica Applicata
EN The g-irradiation effect on the photoluminescence of various types of porous silica glasses and on its change during a half-year storage has been studied. It has been revealed that the photoluminescence intensity of glasses with fine matrix and almost complete absence of silica gel does not change w[...]
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Optica Applicata
EN The selection of silica porous glass being the most suitable material for manufacturing of the actuated scleral part of the eye prosthesis has been justified. The model explaining the photoluminescence intensity oscillations of porous glass during the effusion of the antibiotic out of the glass has [...]
5
84%
Szkło i Ceramika
PL W pracy przedstawiono metody wprowadzania wybranych materiałów ferroelektrycznych (TGS, NaN02 oraz KN03) w matryce szkieł porowatych o różnych średnich rozmiarach porów. Na podstawie pomiarów właściwości elektrycznych (piroelektrycznych i przenikalności elektrycznej) oraz termicznych (rozszerzalnośc[...]
EN The methods of introducing of selected ferreoelectrics materials (TGS, NaN02 and KN03) into porous glasses matrix with different pores size were presented. On the basic on measurements of electrical (pyroelectric, dielectric permittivity) and thermal (thermal expansion, specific heat) properties it [...]
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Chemia i Inżynieria Ekologiczna
PL Opisano metodę sporządzania gazowych mieszanin wzorcowych etenu, wykorzystującą termiczny rozkład związków powierzchniowych. Celem pracy było porównanie wyników uzyskanych dla rożnych porowatych materiałów (żel krzemionkowy, szkło porowate) użytych w procesie modyfikacji. Wyznaczono też zależności m[...]
EN The preparation of gas standard mixtures of ethene, based on thermal decomposition of modified bed surfaces has been described. The aim of this research was to compare of results obtained for different porous materials (silica gel; porous glass) using for modification. Relations between amount of et[...]
7
84%
Optica Applicata
EN Two Vycor glasses were investigated using PALS method. The model of pick-off annihilation in cylindrical free volume was applied to evaluate the pore radii. The o-Ps mean lifetime value in the pores changed from 6.5 to 40 ns in one glass, while from 13 to 51 ns in the other (softer) one. The determi[...]
8
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Optica Applicata
EN PbS semiconductor nanoparticles were grown inside the matrices of zirconium oxide (ZrO2) and zirconium-silica-polyurethane (ZSUR) prepared by the sol-gel method. Zirconium ormosil included polyurethane used to control the growth and aggregation of PbS nanoparticles. The new matrix allows the incorpo[...]
9
84%
Optica Applicata
EN The influence of small doses of gamma -irradiation on the features of the photoluminescence spectra of porous silica glass during long-time (several months) storage after the irradiation is investigated. The non-monotonic dependence of photoluminescence change on the dose of the glasses with a diffe[...]
10
84%
Optica Applicata
EN A method to develop the structure of the internal pore surface is proposed. The surface of porous silicate glasses is modified by impregnating carbon into the pores and subsequent annealing. The procedure is repeated several times. A technique to control the properties of the pore surface is propose[...]
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Optica Applicata
EN Optical properties of elements made of silicate porous glass are measured after their exposure to gamma -radiation. Extraordinary radiation durability of porous glass has been found and interpreted.
12
84%
Optica Applicata
EN The 4-n-alkyl-4'-cyanobiphenyls (nCB, n is the number of carbon atoms in alkyl radical n=5, 8) confined to porous glasses with four different mean pore sizes (2, 4, 54 and 90 nm) have been studied. Using FT MIR and NIR spectroscopy methods we have investigated the interaction of nC8 molecules with t[...]
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Optica Applicata
EN An original interferometric technique for investigating the influence of humidity on change in the linear dimensions of porous silica glasses is developed. The linear dimensions of a specimen are shown to change as a result of competition in the system of compressive capillary forces and expansion f[...]
14
84%
Szkło i Ceramika
PL W pracy przedstawiono proces otrzymywania szkła porowatego w oparciu o metodę z użyciem wypełniacza nieorganicznego (Na2SO4, K2SO4). Szkło to porównano z obecnie stosowana w przemyśle browarniczym ziemią okrzemkową. Wykonano badanie porowatości, gęstości i powierzchni właściwej. Przeprowadzone badan[...]
EN The process of porous glass formation by means of inorganic fillers (Na2SO4, K2SO4) was presented in the papaer. The properties of the glasses were compared with the diatomaceous earth used in the brewery industry nowadays. A porosity, density and the specific surface of the glass and diatomites wer[...]
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Optica Applicata
EN The results of measurements concerning spectral dependences of transmission and reflection coefficients both for porous and two-phase glasses are presented. Relative estimations have been performed for transmission and reflection coefficients of examined samples. Optical characteristics, such as the[...]
16
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Optica Applicata
EN The paper focuses on NIR spectroscopic studies of the structure of surface active centers and interface interactions in novel nanocomposition materials built of nanoporous glasses (PG) and n-alkylcyanobiphenyl (nCB) liquid crystals (LC). NIR (12000–4000 cm–1) spectra of bare PG with p[...]
17
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Optica Applicata
EN The changes in the visible light transmission of the optical porous glasses (PGs), arising from PGs thermal treatment, have been investigated by transmission electron microscopy and optical spectroscopy technique. Also the PGs thermal properties such as linear shrinkage and viscosity have been studi[...]
18
67%
Optica Applicata
EN Light scattering and transmission of a porous silicate glass-based composition material with poly-2-ethylhexylactylate immobilized in the pores have been investigated. A temperature transition (47-50 degrees C) in transmittance has been observed and interpreted. The hysteresis found indicates that t[...]
19
67%
Optica Applicata
EN Basic optical characteristics were studied to reveal the structure of porous glass samples. Acid leaching technology was used to manufacture porous glasses from the bulk of phase-separated alkali borosilicate glasses. The transmission electron microscopy, selected area diffraction and shadow graph t[...]
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67%
Optica Applicata
EN The possibilities of the formation of microoptical elements in the bulk of composite material on the basis of porous glass have been investigated. It has been demonstrated that due to the local laser heating-up of composition material, the local desorption of the adsorbate from a porous matrix is in[...]
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