| 单相钛酸镁微波介电陶瓷的制备和性能(英文) |
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| 引用本文： | 罗驹华,王加芳.单相钛酸镁微波介电陶瓷的制备和性能(英文)[J].硅酸盐学报,2009,37(2). |
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| 作者姓名： | 罗驹华 王加芳 |
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| 作者单位： | 1. 盐城工学院,江苏省生态环境材料重点建设实验室,江苏,盐城,224051
2. 南京工业大学材料科学与工程学院,南京,210009 |
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| 基金项目： | 江苏省科技厅自然科学基金 |
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| 摘 要： | 以碱式碳酸镁和二氧化钛为原料,采用机械力化学法合成了超细MgTiO3粉体,研究了超细MgTiO3粉体的低温制备条件和单相MgTiO3陶瓷的介电性能.结果表明:高能球磨30 h后,原料趋向于无定形态,在700℃煅烧1 h后,可以得到单相MgTiO3粉体.MgTiO3粉体的烧结性能和MgTiO3陶瓷的介电性能的改善丰要是因为超细粉体具有较大的比表面积.在1400℃烧结3 h后,可以得到致密的微波介性能优良的MgTiO3陶瓷,介电常数和品质因数与谐振频率的乘积分别为16.94和4.8 × 10 4 GHz.
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| 关 键 词： | 机械力化学法 超细粉体 钛酸镁陶瓷 微波介电性能 |
SYNTHESIS OF SINGLE PHASE MAGNESIUM TITANATE MICROWAVE DIELECTRIC CERAMICS |
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| LUO Juhua,WANG Jiafang.SYNTHESIS OF SINGLE PHASE MAGNESIUM TITANATE MICROWAVE DIELECTRIC CERAMICS[J].Journal of The Chinese Ceramic Society,2009,37(2). |
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| Authors: | LUO Juhua WANG Jiafang |
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| Affiliation: | 1.Jiangsu Provincial Key Laboratory Eco-Environmental Materials;Yancheng Institute of Technology;Yancheng 224051;Jiangsu;2.College of Materials Science and Engineering;Nanjing University of Technology;Nanjing 210009;China |
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| Abstract: | Ultra-fine magnesium titanate powder was prepared by a mechanochemical method and using basic magnesium carbonate and titanium oxide as starting materials.The conditions of low temperature synthesis of ultra-fine MgTiO3 and the dielectric properties of single phase MgTiO3 ceramics were studied.The results show that after being ball-milled for 30 h,the mixture become amorphous,and single phase MgTiO3 Can be obtained after calcination at 700℃ for 1h.The sintering characteristics and dielectric properties of MgTiO3 Can be improved because of the large specific surface area of ultra-fine powder.Dense MgTiO3 ceramics were obtained after sintering at 1400℃ for 3 h,and the ceramics have good microwave dielectric propeaies,with a dielectric constant of 16.94 and a product with a high mechanical quality factor and a resonance frequency of 4.8×10 4 GHz. |
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| Keywords: | mechanochemical method ultra-fine powders magnesium titanate ceramics microwave dielectric properties |
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