Hot pressing of Ho2O3 and Dy2O3 based magneto-optical ceramics

Балабанов, С. С.; Filofeev, Sergey; Kaygorodov, A. S.; Хрустов, В. Р.; Кузнецов, Д. К.; Novikova, A. V.; Permin, Dmitry; Попов, П. А.; Иванов, М. Г.

doi:10.1016/j.omx.2021.100125

Cited by 9 publications

(7 citation statements)

References 33 publications

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“…This is because the accelerated phonon vibration frequency and the increasing collision probability caused by the elevated temperature shorten phonon mean free path. At room temperature, the thermal conductivity of our sample is much higher than those of previously reported Ho 2 O 3 :5%La ceramic [∼4.8 W/(m⋅K)] and the commercial TGG crystal [∼4.9 W/(m⋅K)], 42,43 further suggesting the good application prospect as Faraday devices.…”

Section: Resultscontrasting

confidence: 53%

Nickel element doping impacts on structure features and Faraday effects of magneto‐optical transparent holmium oxide ceramics

Wang,

Lu,

You

et al. 2024

Int J Applied Ceramic Tech

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The nickel element doped holmium oxide (Ho2O3:Ni) transparent magneto‐optical ceramics were fabricated by vacuum sintering and the dopant impacts on structure features and Faraday effects were investigated. The starting oxide powders were synthesized by pyrolyzing the resulting layered holmium‐based hydroxide nanosheets prepared from a chemical precipitation route using the sodium hydroxide as precipitant at the freezing temperature. Upon high‐temperature sintering, the defect is introduced by Ni2+ substitution for Ho3+ to form the interstitial solid solution. The 1 at.% Ni2+ doped Ho2O3 ceramic sample exhibits an in‐line transmittance of ∼70.04% at 1 550 nm with a relative density of ∼99.88%, while more Ni2+ incorporation (e.g., 2‒5 at.%) even leads to a completely opaque state. The magneto‐optical transparent Ho2O3:1%Ni ceramic developed in this work has Verdet constants of ∼−195, −65, and −29 rad/(T·m) at 635, 1 064, and 1 550 nm, respectively, which are ∼1.8‐fold higher than the commercial terbium gallium garnet crystal or ∼1.4‐fold higher than the pure Ho2O3 ceramic. This material also possesses relatively large figure of merit of ∼14.6°/T at 1 064 nm and relatively high thermal conductivity of ∼7.5 W/(m·K) at room temperature.

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Section: Resultscontrasting

confidence: 53%

Nickel element doping impacts on structure features and Faraday effects of magneto‐optical transparent holmium oxide ceramics

Wang,

Lu,

You

et al. 2024

Int J Applied Ceramic Tech

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“…Nevertheless, when applied in the high power laser system, the materials also need to have more strict requirements: the high thermal conductivity and other characteristics such as certain parameters of optical constants P and Q, optical anisotropy ξ and the mechanical properties and so on. Balabanov et al [236] prepared the Dy2O3 and Ho2O3 based ceramics by hot pressing from the improved SHS powders by preliminary calcination and planetary milling. They investigated the thermal conductivity, linear thermal expansion coefficient, microhardness, elastic modulus, and crack resistance.…”

Section: Dy2o3 Ceramicsmentioning

confidence: 99%

A review on magneto-optical ceramics for Faraday isolators

Zhang¹,

Hu²,

Snetkov³

et al. 2023

Journal of Advanced Ceramics

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As a promising magneto-optical material applied in Faraday isolators, magneto-optical ceramics possess excellent comprehensive properties and have attracted much attention these years. Herein, we review the fabrication and properties of magneto-optical ceramics including garnet, sesquioxide, and A2B2O7ceramics. Some of the ceramics have been proved to possess applicable performance, while further studies are still needed for most of the magneto-optical ceramics. Aiming at the application for isolators, the research status, existing problems, and development trends of magneto-optical ceramics are shown and discussed in this review.

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“…With the increasing laser power and thus higher heat release rate, 1–4 stricter requirements are proposed to Faraday isolators and magneto‐optical materials 5–10 . During the high‐power laser operation, laser beam transmits through magneto‐optical material and heats the material, resulting in temperature gradient and subsequent thermal stress, thermal lens, and depolarization 11–19 . Accordingly, magneto‐optical materials with higher thermal conductivity and better mechanical properties are able to withstand higher laser energy and heat shock 20–23 …”

Section: Introductionmentioning

confidence: 99%

“…[5][6][7][8][9][10] During the high-power laser operation, laser beam transmits through magneto-optical material and heats the material, resulting in temperature gradient and subsequent thermal stress, thermal lens, and depolarization. [11][12][13][14][15][16][17][18][19] Accordingly, magneto-optical materials with higher thermal conductivity and better mechanical properties are able to withstand higher laser energy and heat shock. [20][21][22][23] Terbium aluminum garnet (Tb 3 Al 5 O 12 , TAG) ceramics are widely studied and possess better comprehensive properties, including Verdet constant 24 and thermal conductivity, 25 compared with commercial available terbium gallium garnet (Tb 3 Ga 5 O 12 , TGG) crystals.…”

Section: Introductionmentioning

confidence: 99%

Magneto‐optical, thermal, and mechanical properties of polycrystalline Tb₃Al₅O₁₂ transparent ceramics

Zhang

et al. 2023

J Am Ceram Soc.

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Terbium aluminum garnet (Tb3Al5O12, TAG) ceramics have become a promising magneto‐optical material owing to the outstanding comprehensive performance, including the magneto‐optical, thermal, and mechanical properties. Fine‐grained TAG ceramics with high optical quality and mechanical properties have attracted much attention. In this study, TAG ceramics with fine grains and high optical quality are fabricated successfully by a two‐step sintering method from co‐precipitated nano‐powders. After pre‐sintered at 1525°C in vacuum and hot isostatic pressed at 1600°C, the in‐line transmittance of TAG ceramics reaches 81.8% at 1064 nm, and the average grain size is 7.1 μm. The Verdet constant of TAG ceramics is −179.6 ± 4.8 rad T−1 m−1 at 633 nm and −52.1 ± 1.9 rad T−1 m−1 at 1064 nm, higher than that of commercial Tb3Ga5O12 crystals. The thermal conductivity of TAG ceramics is determined from 25 to 450°C, and the result is 5.12 W m−1 K−1 at 25°C and 3.61 W m−1 K−1 at 450°C. A comparison of mechanical properties between large‐ and fine‐grained TAG ceramics fabricated under different conditions is conducted. The fine‐grained TAG ceramics possess a bending strength of 226.3 ± 16.4 MPa, which is 9.7% higher than that of the large‐grained ceramics. These results indicate that reducing the grain size on the premise of high optical quality helps improve the comprehensive performance of TAG ceramics.

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Hot pressing of Ho2O3 and Dy2O3 based magneto-optical ceramics

Cited by 9 publications

References 33 publications

Nickel element doping impacts on structure features and Faraday effects of magneto‐optical transparent holmium oxide ceramics

Nickel element doping impacts on structure features and Faraday effects of magneto‐optical transparent holmium oxide ceramics

A review on magneto-optical ceramics for Faraday isolators

Magneto‐optical, thermal, and mechanical properties of polycrystalline Tb₃Al₅O₁₂ transparent ceramics

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Hot pressing of Ho2O3 and Dy2O3 based magneto-optical ceramics

Cited by 9 publications

References 33 publications

Nickel element doping impacts on structure features and Faraday effects of magneto‐optical transparent holmium oxide ceramics

Nickel element doping impacts on structure features and Faraday effects of magneto‐optical transparent holmium oxide ceramics

A review on magneto-optical ceramics for Faraday isolators

Magneto‐optical, thermal, and mechanical properties of polycrystalline Tb3Al5O12 transparent ceramics

Contact Info

Product

Resources

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Magneto‐optical, thermal, and mechanical properties of polycrystalline Tb₃Al₅O₁₂ transparent ceramics