Transparent terbium aluminum garnet (TAG)-based ceramics were fabricated by vacuum pre-sintering and hot isostatic pressing (HIP) posttreatment from the co-precipitated TAG powders with different stoichiometric ratios. After component optimization, the transparent ceramics with TAG single-phase and attractive optical quality were obtained. The in-line transmittance of optimal Tb_(1+x)3(Al_0.996255Si_0.003745)₅O_{12.0093625+3x/2} (x = −.004, −.002) ceramics (1.7-mm thick) pre-sintered at 1700°C for 20 h with HIP posttreatment at 1700°C for 3 h under 176-MPa Ar reaches 82.6% at the wavelength of 1064 nm. With increasing terbium components, the secondary phase TAP appears in ceramics, which significantly degrades the optical quality of TAG-based ceramics. The Verdet constant of the TAG-based ceramics at 632.8 nm is about −181 rad T⁻¹ m⁻¹ at room temperature, which is about 33% higher than that of the TGG single crystals (−134 rad T⁻¹ m⁻¹).

中文翻译：

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Tb3Al5O12 基磁光陶瓷的制备与表征

采用不同化学计量比的共沉淀 TAG 粉末，通过真空预烧结和热等静压 (HIP) 后处理制备透明铽铝石榴石 (TAG) 基陶瓷。经过成分优化，获得了具有TAG单相和诱人光学质量的透明陶瓷。最优Tb _{(1+ x )3} (Al _0.996255 Si _0.003745 ) ₅ O _{12.0093625+3 x /2} ( x= −.004, −.002) 陶瓷（1.7 毫米厚）在 1700°C 下预烧结 20 小时，并在 176-MPa Ar 下在 1700°C 下进行 HIP 后处理 3 小时，在 1064 nm 波长处达到 82.6% . 随着铽成分的增加，陶瓷中出现二次相TAP，显着降低了TAG基陶瓷的光学质量。TAG基陶瓷在632.8 nm处的费尔德常数在室温下约为-181 rad T ^-1  m ^{-1 ，比TGG单晶（-134 rad T -1}  m ^-1 ）高约33% ).