摘要:
The invention provides a process for preparing a solid state dye laser in a composite glass matrix, without the use of polymerization initiators, comprising preparing a porous silica gel, effecting thermal treatment thereof at a temperature of at least 500.degree. C. to produce a glass with improved mechanical properties, impregnating a solid state laser dye dissolved in methylmethacrylate into the silicon gel glass in a closed container and effecting heat polymerization of the methylmethacrylate at a temperature of at least 60.degree. C., whereby there is formed a glass having pores impregnated with a solid state laser dye and polymethylmethacrylate.
摘要:
The present invention relates to amorphous thin films and methods of manufacturing the same. These amorphous thin films contain zirconium oxide (ZrO2), preferably at a concentration of at least 30 mol %, and other metal oxides and have surprisingly good mechanical and optical properties. In some embodiments of the present invention, the thin films may be further processed to obtain fluorinated glasses containing the same metal elements as the metal oxides.
摘要:
A process for producing an optical glass product having a predetermined distribution of refractive index in the interior of the product is disclosed. The process comprises the steps of:(a) preparing an aqueous silicate solution containing from about 0.1 to about 0.6 mol/liter of Si (as SiO.sub.2) comprising silicic acid and at least one element selected from the group consisting of rubidium, thallium and cesium;(b) mixing the silicate solution with an acidic aqueous solution, and letting the two solutions react with each other for a period of time sufficient for polymerization to produce a porous gelled product wherein the silica particles are agglomerated;(c) leaching the gelled product with a liquid selected from the group consisting of water, a weakly acidic aqueous solution, an aqueous solution having an alkali metal salt dissolved therein and an aqueous solution of organic matter capable of dissolving Rb.sub.2 O, Cs.sub.2 O, or Tl.sub.2 O, unitl the center of the product starts to dissolve; and(d) drying the leached product in a predetermined atmosphere, and further heating the partially leached gelled product at a temperature sufficiently high to eliminate the particulate material but lower than the melting point of the silica.
摘要:
An easy to clean and stain resistant coating for a cooking product includes an oxycarbofluoride coating. The oxycarbofluoride coating has a composition comprising at least one metal oxide, carbon and fluorine and can be applied to a substrate using a sol-gel process.
摘要:
Sol-gel process comprising preparation of a solution of at least one compound having the formula Xm-M-(OR)n-m addition to the solution of the dopants, hydrolysis of the compound to form the sol, possible addition of an oxide, gelling the sol, recycling the liquid and adjusting the pH-value of the liquid in order to fix the dopants in the aquagel, gel drying and densifying to obtain the glass.
摘要:
The invention discloses porous, bioactive glass and glass ceramic morsels or pellets to be used as tissue graft substitute materials and processes for obtaining the same wherein the bioactive glass and glass ceramic morsels or pellets are made up of natural agents like phosphate, calcium, sodium and other elements which are not alien to the human or animal body. The said preparation process encompasses various steps like quenching sintering, foaming, and sol-gel casting which render the glass morsels or pellets unique bioactivity and enhanced porosity which may facilitate tissue repair and augmentation during tissue graft replacement.
摘要:
The invention provides a process of obtaining a gradient index type of optical element with profiles of first and second metal component concentrations by the sol-gel method. The process of fabricating a gradient index type of optical element comprises steps of dipping a silicon component-containing wet gel prepared by the sol-gel method in a solution containing an alkoxide of at least one metal component selected from a first group consisting of Ti, Nb, Ta, and Zr or a derivative thereof to thereby impart to the wet gel a concentration gradient with a concentration of the first metal component decreasing from a periphery to a center of the wet gel, allowing at least one metal component selected from a second group consisting of Ba, La, Y, Gd, Sr, Ca, and Zn to be dissolved out of the wet gel to thereby impart to the wet gel a concentration gradient with a concentration of the second metal component increasing from the periphery to the center of the wet gel, and drying, and firing the wet gel.
摘要:
The present invention provides a composite shaped body comprising silica nanoparticles and an organic polymer, wherein the silica nanoparticles and the organic polymer form a three-dimensional network; thereby provides: a composite shaped body which exhibits excellent formability and fabricability and which is also suited for use, for example, in producing a silica glass provided with an electrical conductivity; and a silica glass (especially, an electrically conductive silica glass) obtained by firing the composite shaped body.
摘要:
An easy to clean and stain resistant coating for a cooking product includes an oxycarbofluoride coating. The oxycarbofluoride coating has a composition comprising at least one metal oxide, carbon and fluorine and can be applied to a substrate using a sol-gel process.
摘要:
A method of producing doped, monolithic objects of silica in a wide variety of shapes which comprises impregnating a stabilized silica sol-gel monolith with a doping solution having therein a wide range of inorganic or organic dopants to achieve unique physical properties, such as specific optical absorption bands or scintillation properties.