Preparation of copper aluminum borate whiskers via flux method

Abstract

Single‐crystal and uniform copper aluminum borate whiskers have been synthesized by heating a mixture of boric acid, copper sulfate and aluminum sulfate with potassium sulfate as flux at 870 °C for 4 h. The synthesized whiskers exhibit a well‐crystallized, one‐dimensional structure with diameters ranging from 100 nm to 5 μm, lengths from 5 to 100 μm. Heating temperature and flux addition affect the aspect ratio and morphology of the copper aluminum borate whiskers. A possible growth mechanism of the whiskers is proposed. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Highly Distorted Uranyl Ion Coordination and One/Two-Dimensional Structural Relationship in the Ba2[UO2(TO4)2] (T = P, As) System: An Experimental and Computational Study

“…H 3 BO 3 /B 2 O 3 fluxes have been widely used to prepare borate compounds and have been employed here, too. H 3 BO 3 decomposes at high temperatures to form B 2 O 3 .…”

Synthesis of Rutile Titanium Dioxide Whiskers by Flux Method

“…In addition, it is well known that the rutile TiO 2 belong to tetragonal system [10], so the rutile TiO 2 crystal nuclei have anisotropic characteristic, in other words, different crystal faces have different energies. Then combined with dislocation theory [11], the rutile TiO 2 crystal nuclei grew along one-dimensional direction and finally developed into whiskers because of dislocation extension.…”

Preparation and characterization of aluminum borate whiskers reinforced ceramics with MnO2 addition

“…14 In particular, the whisker-like AB phase can significantly increase the strength and toughness of a heterogeneous or ceramicbased materials. 15 Zhu et al 16 synthesized ABWs by a flux method, using copper sulfate, boric acid, and aluminum sulfate octadecahydrate as the raw material and potassium sulfate powders were used as a reagent. The mass fraction of potassium sulfate powders is 40 wt%, and thermostatic time is 4 h in which uniform whiskers could be obtained.…”