Enhanced dielectric properties of alumina ceramic substrate for microwave application

Author

Dai Zhou ; Pang Xueman ; Cheng Kai ; Wang Ziliang

Author_Institution

Nanjing Electron. Devices Inst., Nanjing, China

fYear

2012

fDate

21-23 Nov. 2012

Firstpage

101

Lastpage

103

Abstract

Alumina ceramic with enhanced dielectric property was reported in this paper, which indicates its microwave application. Commercial A1203 powder and sintering aids including MgO were utilized to fabricate alumina ceramic substrate. Liquid deposit was introduced to wrap the surface of A1203 powder with MgO additives uniformly. The prepared composite powder was shaped by tape casting and sintered by two-step sintering to ensure density and suitable microstructure. It is shown that MgO addition restrains gain growing and decreases porosity in scanning electron micrograph. MgA1204 spinel, formed by MgO was detected by XRD. The dielectric loss of the alumina ceramic substrate is 6.84 × 10^-4.

Keywords

additives; alumina; dielectric losses; dielectric properties; magnesium compounds; microwave devices; porosity; powders; sintering; tape casting; Al₂O₃; Al₂O₃ powder; MgAl₂O₄; MgAl₂O₄ spinel; MgO; MgO additive; XRD; alumina ceramic substrate; composite powder; dielectric loss; dielectric property; liquid deposit; microwave application; porosity; scanning electron micrograph; sintering aids; tape casting; two-step sintering; Decision support systems; Radio frequency; A12O3 ceramic; dielectric loss; liquid deposit; sinter;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio-Frequency Integration Technology (RFIT), 2012 IEEE International Symposium on

Conference_Location

Singapore

Print_ISBN

978-1-4673-2303-1

Type

conf

DOI

10.1109/RFIT.2012.6401627

Filename

6401627