Microstructural, electrical, and mechanical characterization of Bi2Cu0.1V0.9O5.35 (BICUVOX) ceramics fabricated from co-precipitated precursor powders
Microstructural, electrical, and mechanical characterization of Bi2Cu0.1V0.9O5.35 (BICUVOX) ceramics fabricated from co-precipitated precursor powders
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由共沉淀前体粉末制造的 Bi2Cu0.1V0.9O5.35 (BICUVOX) 陶瓷的微观结构、电气和机械特性
DOI：
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发表时间：
2012
影响因子：
4.5
通讯作者：
Katarzyna Sabolsky
中科院分区：
文献类型：
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作者：
E. Sabolsky;Soheil Razmyar;Katarzyna Sabolsky
采用共沉淀法合成了掺铜钒酸铋（Bi2Cu0.1V0.9O5.35，BICUVOX），得到了平均粒径约为0.45 μm的均匀细晶粉末。将固结的BICUVOX粉末在空气中在625 °C至800 °C的温度下烧结0-8小时。通过对所得横截面扫描电子显微镜图像进行体视学分析，完成了所有条件下热处理方案与最终微观结构之间的相关性。从这项工作中，675 °C持续1小时的烧结方案导致获得BICUVOX陶瓷微结构，其显示出约97%的相对密度，平均晶粒尺寸为约1.29 μm。该处理条件比相同密度的典型烧结温度低约75-125 °C，并且导致最终晶粒尺寸小约5-10 μm。BICUVOX陶瓷在空气中的四点电导率测试显示，在300 °C和500 °C下的电导率值分别为~0.003-0.007和~0.07-0.12 S/m，这取决于热处理时间表。使用环叠环构造测量相同BICUVOX膜的平均弯曲强度，并且该测量显示弯曲强度高达159.3MPa。该强度比先前报道的BICUVOX膜的值高约92%。
Copper-doped bismuth vanadate (Bi2Cu0.1V0.9O5.35, BICUVOX) was synthesized by a co-precipitation process which resulted in a homogenous, fine-grained powder with an average particle size of ~0.45 μm. The consolidated BICUVOX powder was sintered at temperatures between 625 and 800 °C for 0–8 h in air. The correlation between the thermal processing schedule and the final microstructure were completed for all conditions through stereological analysis of the resultant cross-sectional scanning electron microscope images. From this work, the sintering schedule of 675 °C for 1 h resulted in acquiring a BICUVOX ceramic microstructure that displayed ~97 % relative density with an average grain size of ~1.29 μm. This processing condition was ~75–125 °C lower than typical sintering temperatures for the same density, and resulted in a final grain size that is ~5–10 μm smaller in size. The four-point conductivity testing of the BICUVOX ceramics in air showed values of ~0.003–0.007 and ~0.07–0.12 S/m at 300 °C and 500 °C, respectively, depending upon the thermal processing schedule. The average flexure strength of the same BICUVOX membrane was measured using a ring-on-ring configuration, and this measurement showed flexural strengths as high as 159.3 MPa. This strength is ~92 % greater than previously reported values for BICUVOX membranes.