Mullite whiskers derived from kaolin

B M Kim; Y K Cho; S Y Yoon; R Stevens; H C Park

doi:10.1016/j.ceramint.2008.01.017

Mullite whiskers derived from kaolin

B M Kim
, Y K Cho
, S Y Yoon
, R Stevens
, H C Park

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

107 Citations (SciVal)

Abstract

Short mullite whiskers prepared by firing compacts of kaolin and NH4Al(SO4)(2)center dot 12H(2)O powders, with a small addition (0.8, 1.5 wt%) of NaH2PO4 center dot 2H(2)O, in air 1300 and 1400 degrees C for 15 h have been characterized in terms of whisker morphology, composition and structure. Relatively uniform whisker shaped crystals grew within the silicate glass matrix. After chemically leaching the glass matrix with HF solution using a microwave heating source, the resulting whiskers were exposed as isolated crystals and exhibited an aspect ratio of > 17 (similar to 0.5 mu m in diameter). The mullite whiskers had a composition of 51.06 mol% Al2O3 and 48.94 mol% SiO2, with an orthorhombic crystallographic structure.

Original language	English
Pages (from-to)	579-583
Number of pages	5
Journal	Ceramics International
Volume	35
Issue number	2
DOIs	https://doi.org/10.1016/j.ceramint.2008.01.017
Publication status	Published - 2009

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title = "Mullite whiskers derived from kaolin",

abstract = "Short mullite whiskers prepared by firing compacts of kaolin and NH4Al(SO4)(2)center dot 12H(2)O powders, with a small addition (0.8, 1.5 wt\%) of NaH2PO4 center dot 2H(2)O, in air 1300 and 1400 degrees C for 15 h have been characterized in terms of whisker morphology, composition and structure. Relatively uniform whisker shaped crystals grew within the silicate glass matrix. After chemically leaching the glass matrix with HF solution using a microwave heating source, the resulting whiskers were exposed as isolated crystals and exhibited an aspect ratio of > 17 (similar to 0.5 mu m in diameter). The mullite whiskers had a composition of 51.06 mol\% Al2O3 and 48.94 mol\% SiO2, with an orthorhombic crystallographic structure.",

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TY - JOUR

T1 - Mullite whiskers derived from kaolin

AU - Kim, B M

AU - Cho, Y K

AU - Yoon, S Y

AU - Stevens, R

AU - Park, H C

PY - 2009

Y1 - 2009

N2 - Short mullite whiskers prepared by firing compacts of kaolin and NH4Al(SO4)(2)center dot 12H(2)O powders, with a small addition (0.8, 1.5 wt%) of NaH2PO4 center dot 2H(2)O, in air 1300 and 1400 degrees C for 15 h have been characterized in terms of whisker morphology, composition and structure. Relatively uniform whisker shaped crystals grew within the silicate glass matrix. After chemically leaching the glass matrix with HF solution using a microwave heating source, the resulting whiskers were exposed as isolated crystals and exhibited an aspect ratio of > 17 (similar to 0.5 mu m in diameter). The mullite whiskers had a composition of 51.06 mol% Al2O3 and 48.94 mol% SiO2, with an orthorhombic crystallographic structure.

AB - Short mullite whiskers prepared by firing compacts of kaolin and NH4Al(SO4)(2)center dot 12H(2)O powders, with a small addition (0.8, 1.5 wt%) of NaH2PO4 center dot 2H(2)O, in air 1300 and 1400 degrees C for 15 h have been characterized in terms of whisker morphology, composition and structure. Relatively uniform whisker shaped crystals grew within the silicate glass matrix. After chemically leaching the glass matrix with HF solution using a microwave heating source, the resulting whiskers were exposed as isolated crystals and exhibited an aspect ratio of > 17 (similar to 0.5 mu m in diameter). The mullite whiskers had a composition of 51.06 mol% Al2O3 and 48.94 mol% SiO2, with an orthorhombic crystallographic structure.

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U2 - 10.1016/j.ceramint.2008.01.017

DO - 10.1016/j.ceramint.2008.01.017

M3 - Article

SN - 0272-8842

VL - 35

SP - 579

EP - 583

JO - Ceramics International

JF - Ceramics International

IS - 2

ER -

Mullite whiskers derived from kaolin

Abstract

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