Attaining effective warm white light emitting in functionally advantageous transparent polycrystalline ceramics is vitally important to guarantee the development of both human and botanical systems. In response to this aim, a series of Dy3+‐doped Y2Zr2O7 (YZO) transparent ceramics were prepared via a solid‐state reaction and vacuum sintering approach in this work. These fabricated ceramics show high transparency, where the in‐line transmittance at 700 nm is about 76%, which is very close to the theoretical limit (78%). In addition, under the excitation of UV light sources (358 and 384 nm), strong warm white light emissions were observed in these YZO:Dy transparent ceramics. The corresponding photoluminescence characteristics and mechanisms of YZO:Dy ceramics are investigated carefully. The Dy‐doped YZO ceramics integrate with high transparency and UV‐excitable warm white light emission properties, making them promising light‐emitting converter materials for light‐emitting source applications.

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Dielectric ceramic is one of the most significant dielectric materials utilized as capacitors, energy storage device, and 5G resonator antenna. To better expand its application potential as optoelectronic material, this work reports the fabrication of transparent Sm2Zr2 O7 dielectric ceramics. Single phase of the prepared samples was formed by simple solid-state reaction with high transmittance over 73%. High dielectric constant (∼23) and the low dielectric loss (<0.03) of Sm2Zr2O7 transparent ceramics were obtained at both the low and high frequency regions, which is twice of reported YAG and AlON transparent ceramics. Combining excellent optical property with outstanding dielectric performance, our work demonstrated that Sm2Zr2O7 transparent ceramics is potential as optoelectronic material.