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Alkali-free boroalumino silicate glasses

A glass and oxide technology, used in glass forming, glass forming, glass manufacturing equipment, etc., can solve problems such as metal defects, inability to properly melt batch materials, affecting loading and retrieval capabilities, and reduce elastic sag. , reduce the risk of devitrification, the effect of low density

Pending Publication Date: 2018-10-23
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a modern continuous unit (CU) melter connected to a fusion draw machine (the melter includes: a refractory pre-melter, a precious metal refining furnace, and a precious metal glass transfer rod), 4 types of defects are commonly encountered: (1) Gaseous inclusions (bubbles or blisters); (2) solid inclusions from refractory materials or failure to melt the batch properly; (3) metal defects primarily composed of platinum; and (4) due to low liquidus Devitrified product resulting from excessive devitrification of viscosity or either end of a forming device, mandrel, or isopipe
Additionally, as sheet sizes become larger, elastic sag, which depends on glass density and Young's modulus, becomes a problem, affecting loading, retrieval capabilities, and space for the glass in boxes used to transport the glass between workstations

Method used

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  • Alkali-free boroalumino silicate glasses
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  • Alkali-free boroalumino silicate glasses

Examples

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Embodiment

[0083] The following examples are intended to illustrate exemplary embodiments. These examples are not intended to be inclusive of all embodiments of the subject matter disclosed herein, but are intended to illustrate representative methods and results. These examples are not intended to exclude equivalents and variations of the invention which are obvious to those skilled in the art.

[0084] Efforts have been made to ensure accuracy with respect to numbers (eg, amounts, temperature, etc.), but some errors and deviations must be accounted for. Unless indicated otherwise, temperature is in °C or is at ambient temperature, and pressure is at or near atmospheric. The compositions themselves are given in mole % based on oxide and have been normalized to 100%. There are numerous variations and combinations of reaction conditions such as component concentrations, temperature, pressure and other reaction ranges and conditions that can be used to optimize product purity and yield o...

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Abstract

Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquidcrystal displays (AMLCDs) and active matrix organic light emitting diode displays (AMOLEDs). In accordance with certain of its aspects, the glasses possess good dimensional stability as a function oftemperature.

Description

[0001] Cross References to Related Applications [0002] This application claims priority under 35 U.S.C. §119 to U.S. Provisional Application Serial No. 62 / 298246, filed February 22, 2016, which application is based upon and is hereby incorporated by reference in its entirety. technical field [0003] Embodiments of the present disclosure relate to display glasses for liquid crystal displays and other suitable displays. Background technique [0004] The production of flat panel display devices such as active matrix liquid crystal displays (AMLCDs) and active matrix organic light emitting diode displays (AMOLEDs) is very complex and the properties of the substrate glass are extremely important. First and foremost, glass substrates for AMLCD and AMOLED device production need to have tight control over their physical dimensions. Down-draw sheet drawing processes, particularly the fusion process described in US Patent Nos. 3,338,696 and 3,682,609 to Dockerty, can be manufactur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/091C03C3/093
CPCC03C3/093C03C3/091C03C3/087C03C4/00G02F1/13C03B17/064C03C2203/10
Inventor A·J·艾利森S·戈麦斯Y·加藤
Owner CORNING INC
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