NDLI: Phase transformation in spodumene

Content Provider	Springer Nature Link
Author	Anmin, H. Ming, L. Dali, M.
Copyright Year	2006
Abstract	In situ developments of platelike spodumene–diopside grains were obtained by controlled devitrification of the complex system Li$_{2}$O–CaO–MgO–Al$_{2}$O$_{3}$–SiO$_{2}$ glass. The crystallization mechanisms of spodumene–diopside glass were measured by isothermal and non-isothermal processes using classical and differential thermal analysis techniques. The Avrami constant n was 2.0–2.1, indicating two-dimensional crystal growth and platelike grains. The crystalline phases precipitated first were high-quartz$_{s.s.}$, then transformed to β-spodumene and diopside. The Flexural strength, fracture toughness and thermal shock resistance (in 20°C water) increased from 145 MPa, 1.3 MPa m$^{1/2}$, 800°C (pure spodumene) to 197 MPa, 2.9 MPa m$^{1/2}$ and 920°C (spodumene–diopside) with low thermal expansion coefficient (from 3∼9·10$^{–7}$ to 11.8·10$^{–7}$ K$^{–1}$). This mean in situ developments of platelike spodumene–diopside grains reinforced the low thermal expansion coefficient glass-ceramics.
Starting Page	497
Ending Page	501
Page Count	5
File Format	PDF
ISSN	13886150
Journal	Journal of thermal analysis
Volume Number	84
Issue Number	2
e-ISSN	15728943
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-04-24
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	crystallization glass ceramic heat treatment nucleation Inorganic Chemistry Physical Chemistry Polymer Sciences Measurement Science, Instrumentation
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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