Low temperature sintering and microwave dielectric properties of the LBSCA-doped (Zn0.95Co0.05)(2)SiO4 ceramics
Low temperature sintering and microwave dielectric properties of the LBSCA-doped (Zn0.95Co0.05)(2)SiO4 ceramics
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LBSCA掺杂(Zn0.95Co0.05)(2)SiO4陶瓷的低温烧结及微波介电性能
DOI：
10.1007/s10854-015-2763-3
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Tang Xiaoli
中科院分区：
文献类型：
--
作者：
Chen HuaWen;Su Hua;Zhang HuaiWu;Gui YiMin;Zuo HuaiZhi;Yang Lei;Tang Xiaoli
采用传统的固相法制备了（Zn0.095Co0.05）2SiO 4粉体。成功开发了Li 2 O-B2 O3-SiO2-CaO-Al 2 O3（LBSCA）玻璃作为低掺杂烧结助剂，发现LBSCA玻璃可以将合成粉末的烧结温度从1，300 °C显著降低到900 °C左右。仅1重量%的LBSCA掺杂有助于相对密度增加24.9%。X射线衍射谱表明，得到了纯硅锌矿相。扫描电子显微镜图像表明，低LBSCA掺杂（≤ 2wt%）促进了样品的晶粒致密化和均匀性。当LBSCA含量为2wt%时，900 °C烧结可获得晶粒尺寸均匀、致密的显微组织。该样品还具有高微波介电性能：εr= 6.5，Q ×f= 57，000 GHz和τf= −55 ppm/°C。
The (Zn0.095Co0.05)2SiO4powers were fabricated through a traditional solid-state preparation process. Li2O–B2O3–SiO2–CaO–Al2O3(LBSCA) glass was successfully developed as a low-doped sintering aid and it was found that LBSCA glass could significantly lower the sintering temperature of the synthesized powers from 1,300 °C to around 900 °C. Only 1 wt% of LBSCA-doping contributed to a 24.9 % increase of the relative density. X-ray diffraction spectra indicated that pure willemite phase was obtained. Scanning electron microscope images demonstrated that low LBSCA-doping (≤2 wt%) promoted the grain densification and uniformity of the specimens. A dense microstructure with uniform grain size could be obtained with 2 wt% LBSCA and sintered at 900 °C. The specimen also presented high microwave dielectric properties:εr= 6.5,Q×f= 57,000 GHz and τf= −55 ppm/°C.