NDLI: Study on the formation and growth of potassium titanate whiskers

Content Provider	Springer Nature Link
Author	Bao, Ningzhong Feng, Xin Lu, Xiaohua Yang, Zhuhong
Copyright Year	2002
Abstract	In this paper, K$_{2}$Ti$_{2}$O$_{5}$ single crystals, K$_{2}$Ti$_{4}$O$_{9}$ whiskers and K$_{2}$Ti$_{6}$O$_{13}$ whiskers are synthesized form the anatase-K$_{2}$CO$_{3}$ starting materials by the heating calcination and the corresponding morphologic and structural evolution of products are observed. After dissolving non-crystalline hydrosoluble products contained in sinters, the morphologic difference between the original sinter and the whiskers in it shows the sinter microstructure. The further analysis to crystal components in sinters and to the phase diagram proves that K$_{2}$Ti$_{4}$O$_{9}$ whiskers are firstly formed in K$_{2}$Ti$_{2}$O$_{5}$ crystals and there only exists the phase transformation from K$_{2}$Ti$_{4}$O$_{9}$ whiskers with layered crystal structure to~K$_{2}$Ti$_{6}$O$_{13}$ whiskers with tunnel crystal structure. The K$_{2}$O-rich liquid melt generated from K$_{2}$Ti$_{2}$O$_{5}$ crystals (/and K$_{2}$Ti$_{4}$O$_{9}$ whiskers) coats on the surface of K$_{2}$Ti$_{4}$O$_{9}$ whiskers (/and K$_{2}$Ti$_{6}$O$_{13}$ whiskers), which makes the sinters taking on the layer-by-layer structure (/and the bunch structure). The formation and growth of whiskers is dictated by the K$_{2}$O-rich non-crystalline hydrosoluble melt generated in phase transformations from solid to liquid-solid and its split effect induced by the orientation melting. A generalized “liquid melt inducing” mechanistic model explaining the formation and growth of potassium titanate whiskers was proposed.
Starting Page	3035
Ending Page	3043
Page Count	9
File Format	PDF
ISSN	00222461
Journal	Journal of Materials Science
Volume Number	37
Issue Number	14
e-ISSN	15734803
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2002-01-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Polymer Sciences Industrial Chemistry/Chemical Engineering Characterization and Evaluation Materials Mechanics
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Mechanics of Materials Mechanical Engineering Polymers and Plastics

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