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Preparation and Structure of Ba_2Ti_9O_(20) and BaTi_4O_9 Ceramics Derived from Sol-Gel Powders

机译:Ba_2TI_9O_(20)和衍生自溶胶粉末的BATI_4O_9陶瓷的制备和结构

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Ba_2Ti_9O_(20) (B2T9) and BaTi_4O_9 (BT4) ceramics have been fabricated using sol-gel technique. The sol-gel derived powder was produced from barium acetate and butyl titanate using acetic acid as solvent. The as-prepared powders were then calcined at different temperatures ranging from 600° to 1200°C. After that, the powder was pressed into pellets and further sintered at different temperatures ranging from 1250°C to 1380°C. XRD characterization and Raman spectroscopy showed that after calcining the sol-gel powder at 900°C for 2 h and sintering the pressed pellets at 1330°C for 4 h, triclinic B2T9 and orthorhom-bic BT4 ceramics could be obtained. The dielectric constant and Q-value are 35 and 1910 at 6.1 GHz.
机译:使用溶胶 - 凝胶技术制造了BA_2TI_9O_(20)(B2T9)和BTI_4O_9(BT4)陶瓷。溶胶 - 凝胶衍生的粉末由乙酸钡和钛酸钡制备,用乙酸作为溶剂制备。然后在不同温度范围为600°至1200℃的不同温度下煅烧制备的粉末。之后,将粉末压入粒料中并进一步在1250℃至1380℃的不同温度下烧结。 XRD表征和拉曼光谱表明,在900℃下煅烧溶胶 - 凝胶粉末2小时并在1330℃下烧结压制颗粒,可以获得三级B2T9和邻晶-BIC BT4陶瓷。介电常数和Q值为35和1910,在6.1GHz。

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