Paper Title:
Effect of NH4H2PO4 Content on Properties of the Mullite-Based Investment Materials
  Abstract

The relationships between NH4H2PO4 content and properties including apparent porosity, bulk density, compressive strength, setting expansion and thermal expansion of the mullite-based investment materials have been investigated. The results show that: With increment of NH4H2PO4 content, the bulk density decreases and the apparent porosity increases for the specimens. When the NH4H2PO4 content is less than 9 mass%, the compressive strength of the specimens clearly decreases with increment of NH4H2PO4 content, and the compressive strength of the specimens heated at 900°C is less than that of the specimens heated at 110°C slightly. With increment of NH4H2PO4 content, the setting expansion obviously increases and the thermal expansion decreases a little.

  Info
Periodical
Advanced Materials Research (Volumes 163-167)
Edited by
Lijuan Li
Pages
4508-4511
DOI
10.4028/www.scientific.net/AMR.163-167.4508
Citation
G. L. Yu, N. Li, Y. S. Li, Y. N. Wang, "Effect of NH4H2PO4 Content on Properties of the Mullite-Based Investment Materials", Advanced Materials Research, Vols. 163-167, pp. 4508-4511, 2011
Online since
December 2010
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Price
$32.00
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