In situ synthesis of porous ceramics with a framework structure of magnesium borate whiskers

New porous ceramics with a framework structure of magnesium borate (Mg2B2O5) whiskers with the diameter of 0.3-0.4 mu m and length of 2-5 mu m were synthesized in situ by use of [(MgCO3)4.Mg (OH)2.5H2O] (BMC)-H3BO3 mixture at 900 degree C. With the addition of Ni(NO3)2, the diameter and length of Mg...

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Bibliographic Details
Published inMaterials letters Vol. 121; pp. 206 - 208
Main Authors Chen, Shan-hua, Zhang, Da-fu, Sun, Gang
Format Journal Article
LanguageEnglish
Published 15.04.2014
Subjects
Borates
Ceramics
Formations
Magnesium
Strength
Synthesis
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Summary:New porous ceramics with a framework structure of magnesium borate (Mg2B2O5) whiskers with the diameter of 0.3-0.4 mu m and length of 2-5 mu m were synthesized in situ by use of [(MgCO3)4.Mg (OH)2.5H2O] (BMC)-H3BO3 mixture at 900 degree C. With the addition of Ni(NO3)2, the diameter and length of Mg2B2O5 whiskers decreased to 0.2-0.3 mu m and increased to 4-8 mu m, respectively, while the strength of porous ceramics increased from 4.72 to 15.72MPa. The formation mechanism of the Mg2B2O5 whiskers is considered to be the solution-liquid-solid (SLS) growth.
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ISSN:0167-577X
DOI:10.1016/j.matlet.2014.01.064