摘要:
A method includes placing a material including a glass precursor material in contact with a second material and annealing the glass precursor material to form a glass composition in contact with the second material. In an embodiment, annealing is performed at a single temperature. In another embodiment, annealing is performed at a temperature in a range of 750° C. to 1000° C. In a particular embodiment, the glass composition includes a crystalline fraction of at least 30%.
摘要:
The invention relates to a method of manufacturing an element sensitive to at least one physical parameter of a flow of fluid, comprising a step consisting in a single cycle of immersing, in molten glass, a core of a preassembled sensitive element, said core comprising at least two longitudinal channels along which there pass longitudinally at least two conducting connecting wires which are connected to an at least two-wire winding, said winding being suited to forming a resistive or inductive circuit for detecting said physical parameter, said immersion allowing the connecting wires to be sealed into the channels, allowing said channels to be filled and allowing the outside of the core to be coated in a single immersion, the core, at the end of said single immersion cycle, being sealed and coated in such a way as to obtain an assembled sensitive element. Advantageously, the winding may be "corkscrew" wound inside the longitudinal channels, immersion allowing the connecting wires to be held on the winding and controlling the space between the turns of the winding.
摘要:
The invention relates to a method for the production of a medical form body comprising or containing a lithium silicate glass ceramic. To allow the strength of the form body to be increased compared to the prior art, it is proposed that in a preform body comprising or containing a lithium silicate glass ceramic with a geometry that corresponds to the form body a surface compressive stress is created by replacement of lithium ions with alkali ions of greater diameter, wherein after substitution of the ions the preform body is used as the form body.
摘要:
Silica-titania glasses with small temperature variations in coefficient of thermal expansion over a wide range of zero-crossover temperatures and methods for making the glasses. The method includes a cooling protocol with controlled anneals over two different temperature regimes. A higher temperature controlled anneal may occur over a temperature interval from 750 °C - 950 °C or a sub-interval thereof. A lower temperature controlled anneal may occur over a temperature interval from 650 °C - 875 °C or a sub-interval thereof. The controlled anneals permit independent control over CTE slope and Tzc of silica-titania glasses. The independent control provides CTE slope and Tzc values for silica-titania glasses of fixed composition over ranges heretofore possible only through variations in composition.
摘要:
Die vorliegende Erfindung betrifft ein Verfahren zum thermischen Behandeln eines ringförmigen Bereichs (23) einer inneren Oberfläche (14) eines aus einem Borosilikat-Rohrglas hergestellten Glasbehälters (10), wobei sich der ringförmige Bereich (23) auf einem rohrförmigen Abschnitt (12) des Glasbehälters (10) befindet und sich einem Glasbehälterboden (16) anschließt, umfassend folgende Schritte: - Formen des Glasbehälterbodens (16) aus dem Rohrglas, - Erwärmen des sich dem Glasbehälterboden (16) anschließenden ringförmigen Bereichs (23) der inneren Oberfläche (14) des rohrförmigen Abschnitts (12) auf eine Behandlungstemperatur T Beh oberhalb der Transformationstemperatur T G , - Halten der Behandlungstemperatur T Beh für eine bestimmte Zeitdauer, - Abkühlen des Glasbehälters (10) auf Raumtemperatur. Zudem betrifft die Erfindung eine Bodenmaschine für eine Glasbearbeitungsvorrichtung (30) zum Herstellen von Glasbehältern (10) aus einem Borosilikat-Rohrglas mit einem Verfahren nach einem der vorherigen Ansprüche, umfassend eine oder mehrere Halteeinheiten (36) zum Halten des Glasbehälters (10) bzw. des Rohrglases, wobei die Halteeinheiten (36) um eine Drehachse (R) der Bodenmaschine (32) drehbar gelagert sind, um den Glasbehälter (10) bzw. das Rohrglas zu einer Anzahl von primären Bearbeitungsstationen (40) zu führen, wobei zumindest an einer der primären Bearbeitungsstationen (40) eine Trenneinrichtung (48) zum Trennen des Glasbehälters (10) vom Rohrglas angeordnet ist, wobei die Bodenmaschine (32) eine oder mehrere weitere Bearbeitungsstationen (42) zum thermischen Behandeln eines ringförmigen Bereichs (23) einer inneren Oberfläche (14) des Glasbehälters (10) umfasst, wobei die Halteinheiten (16) so eingerichtet sind, dass sie den Glasbehälter (10) bzw. das Rohrglas auch zu den weiteren Bearbeitungsstationen (42) führen.
摘要:
A method of making a heat treated (HT) substantially transparent coated article to be used in shower door applications, window applications, tabletop applications, or any other suitable applications. For example, certain embodiments relate to a method of making a coated article including a step of heat treating a glass substrate coated with at least layer of or including carbon (e.g., diamond-like carbon (DLC)) and an overlying protective film thereon. The protective film may be of or include both (a) an oxygen blocking or barrier layer, and (b) a release layer, with the release layer being located between at least the carbon based layer and the oxygen blocking layer. The release layer is of or includes zinc oxynitride (e.g., ZnO x N z ). Following and/or during heat treatment (e.g., thermal tempering, or the like) the protective film may be entirely or partially removed. Other embodiments of this invention relate to the pre-HT coated article, or the post-HT coated article.
摘要:
To facilitate a preheating operation in a vacuum degassing apparatus having a flow path of a glass melt in an uprising pipe, a vacuum degassing vessel and a downfalling pipe constituted by a refractory material. Flow of a glass melt G between a melting vessel 100 and an upstream pit 210 of a first conducting pipe structure connected to a vacuum degassing vessel 320 is shut off, and in a state where the flow of the glass melt G in a by-pass 500 for the glass melt G is shut off by a first closing means 220, a combustion gas from preheating burners 530, 540 is introduced to the by-pass 500 to preheat the flow path of the glass melt G in an uprising pipe 330, the vacuum degassing vessel 320 and a downfalling pipe 340.
摘要:
Annealing treatments for modified titania-silica glasses and the glasses produced by the annealing treatments. The annealing treatments include an isothermal hold that facilitates equalization of non-uniformities in fictive temperature caused by non-uniformities in modifier concentration in the glasses. The annealing treatments may also include heating the glass to a higher temperature following the isothermal hold and holding the glass at that temperature for several hours. Glasses produced by the annealing treatments exhibit high spatial uniformity of CTE, CTE slope, and fictive temperature, including in the presence of a spatially non-uniform concentration of modifier.
摘要:
Silica-titania glasses with small temperature variations in coefficient of thermal expansion over a wide range of zero-crossover temperatures and methods for making the glasses. The method includes a cooling protocol with controlled anneals over two different temperature regimes. A higher temperature controlled anneal may occur over a temperature interval from 750 °C - 950 °C or a sub-interval thereof. A lower temperature controlled anneal may occur over a temperature interval from 650 °C - 875 °C or a sub-interval thereof. The controlled anneals permit independent control over CTE slope and Tzc of silica-titania glasses. The independent control provides CTE slope and Tzc values for silica-titania glasses of fixed composition over ranges heretofore possible only through variations in composition.
摘要:
An optical ceramic material heat treatment apparatus, comprising: a furnace body that is capable to contain an optical ceramic material to be heat treated in the inside thereof; a temperature drop control heater that generates heat during dropping a temperature of the optical ceramic material; a refrigerant intake unit that introduces a refrigerant into the inside of the furnace body to flow the refrigerant therein; and a control unit that controls the temperature drop rate, wherein the temperature drop control heater is arranged in the inside of the furnace body and/or in the refrigerant intake unit, the control unit controls at least one of an amount of heat generation of the temperature drop control heater, and a flow rate of the refrigerant in the inside of the furnace body to control a temperature drop rate at the optical ceramic material or in the vicinity thereof to be kept in a predetermined profile.