A method for testing the durability of overflow bricks

Abstract

The invention discloses a method for detecting durability of an overflow brick. The detection method comprises the following steps of: horizontally placing a rectangular to-be-detected overflow brick into a high temperature resistant container in a manner of being vertical to the height direction, respectively placing two lengthwise ends of the to-be-detected overflow brick onto two supporting bases, so as to ensure that creep spaces are formed at the lower surface of the to-be-detected overflow brick and the bottom of the high temperature resistant container; performing high-temperature erosion treatment on the to-be-detected overflow brick in a vitreous humor so as to enable the overflow brick to creep downwards in the height direction, thereby obtaining the creep overflow brick; calculating the high temperature creep rate sigma of the overflow brick by use of a formula I, wherein the formula I is as shown in the description; the lower the high temperature creep rate sigma is, the better the durability of the to-be-detected overflow brick is. The detection method disclosed by the invention is capable of detecting the high temperature creep rate of the overflow brick so as to detect the durability of the overflow brick.

Description

technical field [0001] The present disclosure relates to the technical field of liquid crystal glass production, in particular to a method for detecting the durability of overflow bricks. Background technique [0002] The most suitable forming method for high-end liquid crystal glass substrates is the overflow down-draw method, that is, the molten glass transported into the overflow brick groove overflows from the groove to the overflow brick tip below to form ultra-thin flat glass. The surface of the glass produced by the overflow down-draw method is only in contact with the air, has a good smooth surface, and does not require polishing. The length of the overflow brick is 1500-3100 mm, both ends are placed on the support seat, and the middle is used for overflow molding of molten glass. The working temperature is 1200-1350 ℃. Bending erosion creep will occur, which is manifested by the height of the middle part of the overflow brick falling below the height of the support...

AI Technical Summary

Problems solved by technology

At present, there is no standard method for measuring the high-temperature creep of overflow bricks in China, and there is no report on related detection methods. Therefore, a reliable method is urgently needed to measure the high-temperature erosion creep of overflow bricks and then detect the durability of overflow bricks.

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