Refractory objects including beta alumina
A β-alumina and refractory technology, which is applied in glass forming, glass forming, feeding of melting furnaces, etc., can solve problems such as pollution and shortened service life
Active Publication Date: 2021-09-03
SAINT GOBAIN CERAMICS & PLASTICS INC
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[0084] The concepts described herein will be further illustrated in the following examples, which do not limit the scope of the features described in the claims. The values in this Examples section may be approximated or rounded for convenience.
[0085] Refractory objects comprising a variety of different sintered ceramic materials were prepared using the following methods and the following raw materials. Table 1 includes the compositions in a number of samples, all of which consisted primarily of alumina. Trace levels of impurities may be present but are not recorded as such impurities typically do not significantly affect the performance of such samples.
[0086] Samples of refractories with different beta aluminas had the compositions and properties listed in Table 1.
[0087] Table 1
[0088]
[0089]
[0090] The samples were exposed to a molten glass composition at 1150° C. for 120 hours without any significant relative movement between the samples and the mo...
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Abstract
The present invention relates to refractory objects comprising beta alumina. A refractory object can include a beta alumina. In one embodiment, the refractory object can be used in a glass melting process. In another embodiment, the refractory object may have Al 2 o 3 The total content is at least 10% by weight. Additionally, when the surface of the refractory object is exposed to a molten glass comprising Al-Si-Mg oxide, Mg-Al oxide may not form along the surface of the refractory object. In a particular embodiment, a refractory object may be in the form of a glass overflow forming block for forming a glass object comprising Al-Si-Mg oxide. When forming the glass object, the glass material contacts the beta alumina and, during the flow of the glass material, does not form Mg-Al oxide on its surface along the beta alumina.
Description
[0001] This application is a divisional application of an invention patent application with an application date of April 13, 2012, an application number of 2012800176328, and an invention title of "refractory objects including β-alumina and methods for its manufacture and use". technical field [0002] The present application relates generally to a refractory object comprising beta alumina and methods of making and using the same. Background technique [0003] Alkali alumino-silicate glasses containing magnesia have been used in applications where mechanical properties are more important. These glasses can be formed using a fusion drawing method in which liquid glass flows over the lip of a glass overflow forming block made of zircon material and melts at the bottom of the glass overflow forming block to form a Glass sheet. In contact with alkali aluminosilicate glass, zircon (ZrSiO 4 ) dissociates into ZrO at temperatures close to the glass formation temperature 2 and Si...
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IPC IPC(8): C03B3/02C03B5/00C03C3/083C03C3/085C03B5/235C04B35/101C04B35/66C03B17/06C04B35/622
CPCC03B17/064C04B35/101C04B35/117C04B35/6261C04B41/009C04B41/5031C04B41/87C04B2111/0025C04B2111/00405C04B2235/3201C04B2235/3205C04B2235/3206C04B2235/3208C04B2235/3217C04B2235/3224C04B2235/3225C04B2235/3232C04B2235/3244C04B2235/3251C04B2235/3272C04B2235/3286C04B2235/3296C04B2235/3418C04B2235/5409C04B2235/5436C04B2235/5463C04B2235/656C04B2235/6567C04B2235/77C04B2235/80C04B2235/95C04B2235/9692Y10T428/24942Y10T428/26C04B35/113C04B35/10C03B5/16C03B5/43C03B5/265C04B35/1015C04B35/107
Inventor O·赛特
Owner SAINT GOBAIN CERAMICS & PLASTICS INC