YAG transparent ceramics were sintered well at 1750 °C in vacuum ≤1class="mathmlsrc">class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0167577X16303305&_mathId=si0002.gif&_user=111111111&_pii=S0167577X16303305&_rdoc=1&_issn=0167577X&md5=b9de9a169f72177af0b1d8cf87ca2b66" title="Click to view the MathML source">×class="mathContainer hidden">class="mathCode">10−3 Pa.
They had pure cubic YAG phase and pore-free microstructure.
YAG transparent ceramics showed excellent Q×f value=213,400 GHz.
It is a promising advanced microwave dielectric substrate materials.