Compressive Creep and Thermophysical Performance of Mullite Refractories

Hemrick, JG

Oak Ridge National Laboratory

关键词: Stresses;    Testing;    Mullite;    Furnaces;    32 Energy Conservation, Consumption, And Utilization;   

DOI  :  10.2172/814325
RP-ID  :  ORNL/TM-2002/84
RP-ID  :  AC05-00OR22725
RP-ID  :  814325

美国|英语

来源: UNT Digital Library

【 摘 要 】

Compressive creep testing of ten commercially available mullite refractories was performed at 1300-1450 C and at static stresses between 0.2-0.6 MPa. These refractories were examined because they are used in borosilicate glass furnace crowns and superstructures along with in sidewall applications. Additionally, despite their high cost ({approx}$500/ft{sup 3}) they are cheaper than other refractories such as chrome alumina ({approx}$3000/ft{sup 3}) or fusion-cast alumina ({approx}900/ft{sup 3}) which are used as replacements for traditional silica refractories in harsh oxy-fuel environments. The corrosion resistances of these ten materials were also evaluated. In addition, measurements were made that tracked their dimensional stability, phase content, microstructure, and composition as a function of temperature and time. The techniques used for these characterizations and their respective analyses are described. An intent of this study was to provide objective and factual results whose interpretations were left to the reader.