摘要:
A method for producing a glass preform for an optical fiber by an outside vapor-phase deposition method, which comprises forming fine glass particles by jetting gaseous glass raw material and fuel gas from a first burner to deposit the particles on a seed rod to form a soot rod at such a temperature that a specific bulk density of the soot rod being formed is low and subsequently heating the soot rod by a second burner so as to increase the bulk density of the soot and then sintering the soot rod to obtain a transparent glass preform for an optical fiber, by which method, a highly pure glass preform is produced in a good deposition yield without cracking.
摘要:
A process is disclosed for the removal of water and water derived impurities, e.g. OH.sup.-, substitutionally or interstitially incorporated in the structure of crystalline and amorphous materials, more specifically, in metal oxides, e.g. fused silica or aluminum oxide, wherein the material is exposed in powdered form to a gaseous mixture of halogen and carbon monoxide at a predetermined elevated temperature. The mixture of halogen and carbon monoxide reacts to cause the water and OH.sup.- ion concentration in the processed material to be reduced to an extremely low level. Materials purified by the process can be used to produce optical fibers and laser windows of excellent mechanical, thermal and optical properties.
摘要:
An improved method of preparing optical fiber preforms and optical fibers by so called rod-in-tube method, wherein before collapsing a tube to heat-adhere to a rod, a specific glass surface treating agent and oxygen gas are flowed through the clearance between the rod and the tube maintained at a high temperature, whereby an optical fiber preform free from imperfections at the interface between the rod and the tube can be produced so as to give optical fibers of low-loss. As the above glass surface treating agent, those materials are employed which satisfy the following criteria: (i) the hydrogen content thereof being not more than about 1% by weight, and (ii) the substances, produced therefrom in the presence of oxygen gas at a high temperature, having a boiling point or sublimation point of not more than the temperature required for collapsing the tube.
摘要:
The invention relates to a process for producing a tubular glass membrane with wall thicknesses between 5 and 30 microns and reproducible pore sizes between 11 A and 50 A. Alkali borosilicate glass is drawn into discrete hollow tubes and immediately cooled. The tubes are thermally treated to effect a phase separation into a coherent silicon dioxide phase and a boron oxide phase rich in alkali borate. The boron oxide phase is leached out with mineral acid. The tubes can be subsequently treated to give enlarged or reduced pores, asymmetric pores and coated surfaces.
摘要:
1. A METHOD FOR MAKING A LOW ALKALI-CONTAINING POROUS GLASS ARTICLE HAVING A HIGH THERMAL STABILITY COMPRISING: (A) HEATING A PHASE-SEPARABLE ALKALI-BOROSILICATE GLASSS TO A TEMPERATURE SUFFFICIENT TO SEPARATE THE GLASS INTO TWO PHASES, ONE OF WHICH IS A BORATE-RICH PHASE AND IS SOLUBLE IN AN AQUEOUS SOLUTION, (B) A FIRST LEACHING OF THE PHASE-SEPARATED GLASS WITH WATER FOR A TIME AND AT A TEMPERATURE SUFFICIENT TO REMOVE A MAJOR PORTION OF THE BORATE-RICH PHASE TO FORM A POROUS GLASS HIGH IN SILICA, (C) A SUBSEQUENT LEACHING OF THE PREVIOUSLY LEACHED POROUS GLASS WITH AN ACID FOR A TIME AND AT A TEM-
PERATURE SUFFICIENT TO REMOVE SUFFICIENT ALKALI AND BORATE NOT REMOVAL IN THE FIRST LEACHING TO PROVIDE A LOW ALKALI-BORATE CONTAINING MICROPOROUS GLASS STRUCTURE HAVING A HIGH THERMAL STABILITY.
摘要:
A process for sealing a multilayer article against environmental degradation. The article comprises a photoactive layer disposed on a length of flexible substrate and is sealed by applying a sol-gel layer to the outermost layer of the article and curing the sol-gel layer into a flexible, glass protective-coating. The multilayer article can be a photovoltaic device.
摘要:
In the formation of sheet material from molten glass, molten glass is formed in a melting furnace and transported through a precious metal delivery system to the forming apparatus. Disclosed herein is a method to eliminate carbon-containing contamination of individual components of the precious metal delivery system prior to their installation and use. The method comprises one or more heat treating steps in an oxygen-containing atmosphere prior to and/or during assembly of the component.
摘要:
A ceramic consisting essentially of: about 51% to about 68% by weight ZrO2; about 20% to about 40% by weight Al2O3; about 9% to about 12% by weight CeO2; about 0.05% to about 0.2% by weight SiO2; about 0.01% to about 0.1% by weight MgO; about 0.1% to about 0.6% by weight MnO; and about 0.01% to about 0.8% by weight CaO.
摘要:
Disclosed herein is an article having: coalesced first and second glasses, wherein: the first glass has at least two different metal oxides, wherein the first glass has a Tg1 and Tx1, and wherein the difference between the Tg1 and the Tx1 is at least 5K, the first glass having less than 20% by weight SiO2, less than 20% by weight B2O3, and less than 40% by weight P2O5; and the second glass has at least two different metal oxides, wherein the second glass has a Tg2 and Tx2, and wherein the difference between the Tg2 and the Tx2 is at least 5K, the second glass having less than 20% by weight SiO2, less than 20% by weight B2O3, and less than 40% by weight P2O5.
摘要翻译:本文公开了具有:聚结的第一和第二玻璃的制品,其中:第一玻璃具有至少两种不同的金属氧化物,其中第一玻璃具有Tg1和Tx1,并且其中Tg1和Tx1之间的差为至少5K ,第一玻璃具有小于20重量%的SiO 2,小于20重量%的B 2 O 3和小于40重量%的P 2 O 5; 并且所述第二玻璃具有至少两种不同的金属氧化物,其中所述第二玻璃具有Tg2和Tx2,并且其中所述Tg2和所述Tx2之间的差值为至少5K,所述第二玻璃具有小于20重量%的SiO 2,少于 不足20重量%的B 2 O 3和小于40重量%的P 2 O 5。
摘要:
A method of making a thin film transistor comprises (a) solution depositing a dispersion comprising semiconducting metal oxide nanoparticles onto a substrate, (b) sintering the nanoparticles to form a semiconductor layer, and (c) optionally subjecting the resulting semiconductor layer to post-deposition processing.