Abstract
Transparent Y3Al5O12 (YAG) ceramics haze in annealing and thermal-bonding because of second phase exsolution. To address this problem, SiO2 and fluorides co-doped transparent ceramics were prepared from YAG powders by slip casting and vacuum sintering method. 0~0.18 wt% of fluorides were doped into YAG ceramics as sintering aids along with 0~1.5 wt% of SiO2. Fluorides prompted sintering process and improved optical properties of sintered samples. SiO2 lightly doped (0.027 wt%) YAG transparent ceramics were obtained by co-doping with fluorides. Composition analysis showed that fluorides decreased Si content in sintered YAG ceramics and as a result, the formation of Si-riched second phase was successfully suppressed in annealing process.
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