The Effect of Aluminum Phosphate Binder on the Crystallization of Mullite-Silica Fibers

The Effect of Aluminum Phosphate Binder on the Crystallization of Mullite-Silica Fibers Refractories and Industrial Ceramics Vol. 45, No. 4, 2004 THE INTERNATIONAL CONFERENCE OF REFRACTORISTS AND METALLURGISTS THE EFFECT OF ALUMINUM PHOSPHATE BINDER ON THE CRYSTALLIZATION OF MULLITE-SILICA FIBERS 1 1 Ya. N. Pitak and Yu. V. Churilova Translated from Novye Ogneupory, No. 4, pp. 41 – 43, April, 2004. Heat insulators based on mullite-silica fibers and alumi At present, fibrous insulators based on mullite-silica fi- - bers have found wide application in thermal power plants num phosphate binder were developed at the NTU KhPI that and structures operating at high temperatures. However, ow- display a low apparent density (300 – 370 kgm ), low heat ing to the high-temperature crystallization, glass-like fibers conductivity (0.19 W(m  K) at 600°C), sufficient mechani- have limited application at temperatures higher than cal strength (0.3 MPa), and linear shrinkage ( 3%) when 1150 – 1250°C. Because of the microcrystalline species gen- heated to about 1400°C. The fibers in the material are in inti- erated during heating with a size comparable to the fiber di- mate contact with the binder. On heating, the material com- ameter, the fibers drop sharply in strength, develop brittle- ponent undergo physicochemical and structural transforma- ness, and tend to Refractories and Industrial Ceramics Springer Journals

The Effect of Aluminum Phosphate Binder on the Crystallization of Mullite-Silica Fibers

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Kluwer Academic Publishers-Plenum Publishers
Copyright © 2004 by Plenum Publishing Corporation
Materials Science; Characterization and Evaluation of Materials; Materials Science, general; Ceramics, Glass, Composites, Natural Materials
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