Commercial Al2O3 Research Articles

CO2 methanation under more realistic conditions: Influence of O2 and H2O on Ni-based catalysts’ performance

In this work, Ni-based catalysts (15 wt%) promoted with Y (15 wt%) and Fe (1 wt%) supported on an optimized USY zeolite were prepared by incipient wetness co-impregnation, characterized by XRD, TGA, N2 adsorption, H2-TPR, and TEM, and finally tested towards CO2 methanation (total flow of 274 mL/min, H2/CO2 = 4, 2.5 bar and 0.2 g of catalyst) including water or oxygen in the feed. On one side, water (∼5 vol%) shows a limited impact on catalysts’ performance despite being a product of the CO2 methanation reaction. These results were mainly attributed to the high hydrophobicity of the studied catalysts, as well as to the absence of additional/competitive reactions. On the other side, oxygen (∼4 vol%) negatively affected the activity of the tested catalysts, decreasing the CO2 conversion, particularly for the unpromoted catalysts. Two different aspects were found to be responsible for the decline in activity: on the one hand, the H2/O2 reaction, which is faster than the CO2 methanation and decreases H2 availability for Sabatier reaction; on the other hand, the partial re-oxidation of nickel active sites, evidenced by post-test characterization, which decreases the number of Ni0 active sites, and therefore, leads to a drop in CO2 conversion. Reversibility tests to assess O2 effect were also performed, indicating that its impact on the catalytic performances mainly arises from the decrease in H2 partial pressure, leading to operation under sub-stoichiometric CO2 methanation conditions (H2/CO2 ∼ 3). When compared to a commercial Al2O3–supported Ni catalyst, zeolite-based samples demonstrated superior resistance to H2O and O2.

The chemical compatibility of oxide ceramic candidates in static PbLi for advanced breeding blanket channel components

The use of a PbLi eutectic alloy is extended in the Dual Coolant Lead Lithium (DCLL) and Water Coolant Lead Lithium (WCLL) Breeding Blanket (BB) design concepts in future fusion reactors. However, the reactivity of PbLi is a challenging problem, as the flow liquid metal can damage metallic and ceramic materials. For the development of BB technologies, to conduct chemical compatibility studies of materials that will be exposed to the liquid metal is therefore critical. The advanced DCLL concept considers the use of ceramic channels, which could help to extend the BB operating window above 550 °C while improving the tritium-breeding ratio. Since BB components will be highly exposed to neutrons, the influence of PbLi in neutron-like damaged components is also of high concern as compositional changes may modify properties and functionality of the exposed material. Consequently, selected ceramics were submitted to long-term chemical compatibility experiments using COES, a lab-scale facility located at the Liquid Metal Laboratory at CIEMAT, Spain. Commercial Al2O3 ceramics were tested in the as-received and light-ion-implanted conditions, the resultant surfaces after static PbLi exposition being studied by SEM-EDX microstructural and SIMS analytical techniques. The conclusions after the long-term chemical compatibility experiments suggest that the use of bulk alumina ceramics in contact with PbLi is promising. Although lithium diffuses inside the ceramic transforming the initial alumina stequiometry, the surface structural damage is limited to the first 50 µm in the worst case, and could be still considered as a candidate ceramic material for the advanced DCLL BB.

Improved Structural Description of Different γ-Al2O3 Materials Using Disordered δ5-Al2O3 Phase via X-ray Pair Distribution Function Analysis

Extensive research has been conducted in the past on the crystallographic characteristics of γ-Al2O3 support materials due to their advantageous properties in heterogeneous catalysis. While their structure is most commonly described as spinel, their intrinsic disorder and nanostructure have prompted alternative models involving tetragonal space groups, supercells, or occupancy of non-spinel positions. X-ray pair distribution function (PDF) analysis has further postulated the existence of short-range order domains with structural remnants from boehmite precursors from which γ-Al2O3 is commonly prepared via calcination. In this PDF study, we now show that a recently theoretically found monoclinic δ5-Al2O3 phase is, in fact, best suited for describing the structure of different commercial Al2O3 supports, as well as a self-prepared and an industrial Ni/Al2O3 methanation catalyst. Furthermore, in situ experiments under catalytic cycling in the methanation reaction demonstrate that the nanoscale structure of this δ5 phase is preserved during cycling, pointing towards the high stability of the therein-represented disorder. A complete description of the disordered Al2O3 support structure is crucial in the field of heterogeneous catalysis in order to distinguish disorder within the bulk support from additional interfacial restructuring processes such as surface oxidation or spinel formation due to nanoparticle–support interactions during catalytic cycling in in situ scattering experiments.

Enhanced stability and catalytic activity of subnanometric platinum cluster by surface doping of zirconium in CeO2

There has been a continuous effort to improve the thermal stability of subnanometric platinum (Pt) cluster (<2 nm) catalyst because Pt cluster on CeO2 support can be mobile and aggregated into nanoparticle on heating at elevated temperatures, yet this great challenge remains. In this study, a strategy is reported to improve the thermal stability of subnanometric Pt cluster by hydrothermal deposition method. Based on this method, zirconium (Zr) was precisely doped on surface of Ce0.95Zr0.05O2 by accurate control of Pt subnanometric cluster size. The surface doping of Zr is favorable for forming the Zr–O–Ce site and activating surface lattice oxygen atoms, which results in strong electronic interactions to stabilize the Pt subnanometric cluster. After high-temperature aging treatment at 1000 °C/4 h, the single atom Pt supported on CeO2 is aggregated into larger sized (>3 nm) nanoparticle. In contrast, the single atom Pt supported on Ce0.95Zr0.05O2 displays less agglomeration into subnanometric cluster with size of (1.4 ± 0.3) nm. Moreover, the CO oxide catalytic performance of Ce0.95Zr0.05O2–Pt is 26 % and 31 % higher than that of CeO2–Pt and commercial Al2O3–Pt catalysts, respectively. The experimental and density functional theory (DFT) calculations indicate that the Zr–O–Ce site and Pt subnanometric cluster interface have more defect sites and active oxygen species than CeO2–Pt interface, which activate the Mars van Krevelen (MvK) mechanism, facilitating the catalytic performance.

Thermal enhancement of optical-thermal-electrical isolation package structure for UVA LEDs

As one of the most important heat transfer channels for ultraviolet radiation-A light-emitting diodes (UVA LEDs), the substrate often simultaneously undertakes the tasks of electrical connection and UV reflection as well, which makes the optical, thermal and electrical performance mutually constrained, resulting in poor heat dissipation and light output efficiency. In order to suppress the constraint relationship between these factors, the printed-circuit-board copper heat sink composite substrate (PCCS) was assembled by adhesion and pressure implantation, and UVA LEDs with optical-thermal-electrical isolation packaging structure were prepared. The light, electricity, and heat in this structure flow in their respective pathways, greatly reducing the mutual influence. Compared with commercial Al2O3 -Ceramic devices, under the driving current of 1000 mA and testing conditions of 25 ℃, the junction temperature of PCCS devices decreased by 13.3 ℃, and the thermal resistance decreased by 5 K/W with a higher stable-transient ratio. At 25 ℃, the lifespan of PCCS devices is 20 % longer than that of Al2O3-Ceramic devices. The above results indicate that the optical-thermal-electrical isolation packaging structure effectively solves the problem of reduced light output efficiency caused by heat accumulation through reasonable separation of the pathways, resulting in significant application potential in improving the luminous efficiency and reliability of UVA LED devices.

Preparation of monophasic YAG raw material by multi-stage process

The paper deals with the study of the features of the process of YAG phase formation via the Solid-State Reaction (SSR) method according to the proposed multi-stage scheme, including three stages of various mechanical and thermal processing (pre-milling in a ball mill for 24, 48 and 72 h, as well as firing at 1150 °C, 1250 °C, and 1450 °C with intermediate grinding step). The commercial micrometer-sized Y2O3 and Al2O3 powders were used as starting materials. The phase transformation was monitored by the X-ray diffraction in each synthesis stage. The microstructure and elemental distribution of samples were studied by scanning electron microscopy and energy-dispersive X-ray spectrometry. During the work, we found the dual effects of partially reacted mixture grinding, which can accelerate or slow down the synthesis rate depending on the YAG content in the preceding stage. We have proposed a simple model including the concept of “critical YAG concentration”. When the lower limit of this parameter (over 60 %) is reached, grinding has a negative effect on the further course of the SSR. Carrying out the synthesis according to a three-stage scheme makes it possible to obtain a product with a YAG content above 90 %, regardless of the pre-milling time, and the use of a two-stage synthesis scheme provides a monophasic raw material (99 % of YAG) suitable for further single crystals growth. The increased efficiency of the multi-stage YAG synthesis scheme was demonstrated in comparison with the conventional one-stage obtaining process that yielded only up to 60% of the target phase in the temperature range up to 1500 °C.

Comparative Analysis of Commercial Al2O3 Powders and the Dispersion Characteristics of Slurries Produced Using Them

Comparative Analysis of Commercial Al2O3 Powders and the Dispersion Characteristics of Slurries Produced Using Them

Сравнительный анализ структуры и свойств керамик на основе оксида алюминия, полученных методами свободного и электроимпульсного плазменного спекания

The effect of the initial size of alumina particles on the density, microstructure, hardness, and fracture toughness of ceramics obtained by conventional and spark plasma sintering (SPS) has been studied. We studied ceramics obtained from commercial Al2O3 powders with an initial particle size of 40 – 50 nm, 0.2 mm, and 1 mm, and domestic fine powders with an initial particle size of 0.2 – 3 mm, and Al2O3 + 0.25 vol. % MgO and Al2O3 + 10 vol. % ZrO2. It is shown that the density of alumina ceramics nonmonotonically depends on the initial size of Al2O3 powder particles. It has been established that an increase in the grain size leads to a nonmonotonic change in the hardness of alumina ceramics. It has been established that the addition of 0.25 vol. % MgO accelerates the sintering of alumina. The addition of 10 vol. % ZrO2 makes it possible to provide an optimal combination of hardness and fracture toughness. It is shown that fine-grained ceramics obtained by the SPS method have a higher hardness. It has been suggested that SPS of submicron alumina powders with an amorphous layer on the surface, additionally stabilized by zirconia particles, is promising for further increasing the hardness of alumina ceramics.

Reduced graphene oxide-encaged submicron-silicon anode interfacially stabilized by Al2O3 nanoparticles for efficient lithium-ion batteries.

Silicon-carbon composites have been recognized as some of the most promising anode candidates for advancing new-generation lithium-ion batteries (LIBs). The development of high-efficiency silicon/graphene anodes through a simple and cost-effective preparation route is significant. Herein, by using micron silicon as raw material, we designed a mesoporous composite of silicon/alumina/reduced graphene oxide (Si/Al2O3/RGO) via a two-step ball milling combined annealing process. Commercial Al2O3 nanoparticles are introduced as an interlayer due to the toughening effect, while RGO nanosheets serve as a conductive and elastic coating to protect active submicron silicon particles during lithium alloying/dealloying reactions. Owing to the rational porous structure and dual protection strategy, the core/shell structured Si/Al2O3/RGO composite is efficient for Li+ storage and demonstrates improved electrical conductivity, accelerated charge transfer and electrolyte diffusion, and especially high structural stability upon charge/discharge cycling. As a consequence, Si/Al2O3/RGO yields a high discharge capacity of 852 mA h g-1 under a current density of 500 mA g-1 even after 200 cycles, exhibiting a high capacity retention of ∼85%. Besides, Si/Al2O3/RGO achieves excellent cycling reversibility and superb high-rate capability with a stable specific capacity of 405 mA h g-1 at 3000 mA g-1. Results demonstrate that the Al2O3 interlayer is synergistic with the indispensable RGO nanosheet shells, affording more buffer space for silicon cores to alleviate the mechanical expansion and thus stabilizing active silicon species during charge/discharge cycles. This work provides an alternative low-cost approach to achieving high-capacity silicon/carbon composites for high-performance LIBs.

Selection of thin-film-integrable substrates for THz modulator

The integrable substrate for THz modulation directly influences both the quality of films and THz absorption. Currently, the available THz substrate candidate library is still not clear. Here, we have carried out a systematic investigation of commonly used commercial substrates, including Si, quartz SiO2, MgO, Al2O3, GdScO3 and TbScO3 in the range of 0.4–1.6[Formula: see text]THz. It is found that low resistance Si, TSO and GSO are certainly not appropriate for THz light modulation due to their relatively higher absorption and dielectric constant, while the rest show better THz transmittance, low refractive index and loss. However, the dielectric constant and refractive index of high resistance Si are generally two times larger than quartz SiO2, Al2O3 and MgO. Compared with Al2O3 and MgO, quartz SiO2 shows at least 50% lower dielectric constant, refractive index and absorption, making it the best candidate. Our research is believed to build the rich substrate candidate library for THz range light modulation.

Effects of the Sintering Process on Al2O3 Composite Ceramics Fabricated Using Material Extrusion and Photo-Polymerization Combined Process

The sintering process can improve the microstructure of Al2O3 composite ceramics and enhance their comprehensive properties, but the effects of the sintering process on Al2O3 composite ceramics are still unclear. Herein, a novel Al2O3 composite ceramic was printed using the material extrusion and photo-polymerization combined process, and the final ceramic was obtained using one-step sintering (TS) and two-step sintering technology (TSS). Based on the testing results, such as the relative density (Drel), average grain size (AGS), hardness, bending strength, and fracture toughness, TSS was suitable for the refinement of commercial Al2O3 ceramics. Moreover, the highest sintering temperature of the second step (T2) was at 1550 °C, while that of the shortest holding time (t) was at 4 h (TSS8), which was to ensure densification before rapid grain growth. The Drel and AGS of the best ceramics obtained via TSS8 were 97.65% and 1.52 µm, respectively. Their hardness, bending strength, and fracture toughness were also enhanced, and they were affected by T2, t, and the interaction. In sum, the TSS obtained better fracture toughness and bending strength, which had great potential in the application of the additive manufacturing field.

Precursor-oriented design of nano-alumina for efficient removal of antibiotics

Rapid and efficient removal of environmental antibiotics is vital to curb bacterial resistance. Through rational precursors-oriented design, we attain the best Al2O3 absorbent by 500 °C calcination of ammonium aluminium carbonate hydroxide (AACH) precursor from NH4HCO3 route (AACH-NH4HCO3-500) for fast and efficient removal of tetracycline (TC) and other antibiotics from environmental waters including high-salinity wastewater. AACH-NH4HCO3-500 (0.25 g·L−1) can remove (69.92 ± 1.78)% of aqueous TC (0.025 g·L−1) within 5 min and (97.62 ± 2.75)% within 2 h, and the adsorption capacity is 444.4 mg·g−1, which is the highest qmax of TC for the 2 h-adsorptions among numerous adsorbents. AACH-NH4HCO3-500 has fine tolerance to the coexisting substances, and can be easily regenerated and reused, and has no harm even discarded. The relations among the synthetic methods, the structural features, and the adsorption functions of Al2O3 are disclosed through a systematic comparison of the commercial Al2O3 and different Al2O3 nanomaterials attained from three precursors produced by five different routes. The reasons behind the exceptional adsorption performance are discussed throughout. Our findings would facilitate the development of excellent adsorbents for removal of other pollutants.

Pressureless sintering behaviour of Al2O3/ZrO2 amorphous/solid solution powder with ultra-fine ZrO2 nanoparticle precipitation

In this paper, we present a novel Al2O3/ZrO2 amorphous/solid solution powder that exhibits a low pressureless sintering temperature and can precipitate numerous ultra-fine ZrO2 nanoparticles. The powder was prepared by combustion synthesis and bead milling. A series of characterizations were conducted to investigate the sintering behaviour and sintering activation energy of the as-synthesized powder. Commercial Al2O3 and ZrO2 powders with similar sizes were mixed and served as the referential sample. The experimental results and analysis indicated that the sintering activation energy and temperature of the Al2O3/ZrO2 amorphous/solid solution powder were much lower than that of the commercial powder due to its metastable state and lattice defects, its sintering activation energy and temperature were much lower than that of the commercial powder. As a result, its sintering temperature decreased to only 1400 °C, more than 100 °C lower than the commercial powder. Furthermore, we observed that the solid solution could decompose during sintering, forming a significant number of ultra-fine ZrO2 nanoparticles measuring 5 nm. These nanoparticles effectively enhanced the mechanical performance of the ceramic by shifting the fracture mode from intergranular to transgranular. Consequently, the fracture toughness and bending strength of the ceramic could reach up to 6.03 MPa m0.5 and 525 MPa, respectively, which is much higher than that of the ceramic sintered with commercial powder. The insights gained from this study may be of assistance to the synthesis of high sintering activity ceramic powders and nanocomposite ceramics.

Investigations of high temperature synergetic tribological behavior of HVOF deposited Ni-based metallic coating with self-lubricating ceramic phase (h-BN)

In the present investigation the influence of solid lubricants (Ag, MoS2, and h-BN) addition on the friction and wear properties of Ni-based coatings were studied. The coatings were deposited using high velocity oxygen fuel (HVOF) route with fixed concentration (10 wt%) of MoS2 and Ag while varying the weight percentages (0, 5, 7.5, and 10 wt%) of h-BN. However, the hardness of the coated samples was observed to decrease from 403 HV0.3 to 380 HV0.3 for 5 wt% h-BN, whereas it declined to 365 HV0.3 and 310 HV0.3 corresponding to the samples with 7.5 and 10 wt% of h-BN. Further, the tribological properties of coated specimens against Al2O3 ball were explored from room temperature (RT) to 800 °C. Commercial Al2O3 ceramic ball with diameter 6 mm was used as the counterpart. The friction coefficient and wear rate were observed to decrease with rise in temperature, particularly the coefficient of friction (COF) for the coated sample (7.5 wt% h-BN) dropped from 0.5 to 0.15. Moreover, the coating with 7.5 wt% h-BN showed the best tribological behavior tested under the aforesaid conditions. The favorable tribological properties of the coatings were explained and linked to the observed behavior on the basis of the combined effect of NiO, AgMoxOy, Ag, MoS2 and optimal concentration of h-BN.

Sustainable production of aromatic-rich biofuel via catalytic co-pyrolysis of lignin and waste polyoxymethylene over commercial Al2O3 catalyst

Co-valorization of biomass and multiple solid wastes is essential to environment protection and energy security. Herein, aromatic-rich biofuel was produced from lignin and waste polyoxymethylene (POM) via catalytic co-pyrolysis process. Commercial and cheap γ-Al2O3 catalyst exhibited good catalytic performance. Series characterizations and bench-top pyrolysis experiments were conducted to illustrate the synergism between raw materials and the mechanism of aromatics formation. The TG analysis and thermodynamics calculation revealed that a remarkably positive synergistic effect existed between lignin and POM, which reduce the activation energies and make the reaction more conducive in terms of thermodynamics. Meanwhile, the yields of biochar and bio-oil increased considerably. Additionally, the operating conditions affected the product distributions significantly. The suitable mixing ratio of lignin to POM was around equal (5:5) with the bio-oil yield increased to 28.3 % and aromatic hydrocarbons selectivity increased to > 95 %. Moreover, POM, the precursor for alkylating reagents and hydrogen donors, could promote the deoxygenation reactions of phenolic intermediates and result into aromatic hydrocarbons. The acid sites of γ-Al2O3 promoted series secondary cracking reactions (alkylation, deoxygenation), and thus improved bio-oil quality. Finally, the stability test showed that commercial γ-Al2O3 catalyst was slightly deactivated after 4 cycles because of coke deposits and acid sites loss.

YÜKSEK ENERJİLİ ÖĞÜTME İLE ÜRETİLEN Al2O3 TAKVİYELİ CU KOMPOZİTLERDE PARÇACIK BOYUTUNUN ETKİSİ

Production of copper (Cu) composites with a reinforced Cu matrix using mechanical alloying with Aluminum oxide (Al2O3) particles of different sizes was achieved using high-energy ball milling procedure. The initial materials consisted of inert gas-atomized spherical electrolytic Cu powders containing 0.5 wt. % commercial Al2O3 powders, with particle sizes ranging from 10 µm to 1 µm. Cu powders with different particle sizes of Al2O3 were high-energy ball milled at 500 rpm for 3 hours to attain a consistent distribution of Al2O3 throughout in the Cu matrix. The powders that were high-energy ball milled were then subjected to cold-pressing at 500 MPa and isothermally sintered for 1.5 hours at 880°C in an Ar atmosphere. The fabricated copper composite materials were characterized using X-ray diffraction analysis (XRD), field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDXS), density and macrohardness tests. The wear properties and mechanism were investigated through tribological pin-on-disc experiments, which revealed that the reinforcing effect was more significant when finely dispersed Al2O3 particles were combined into the Cu matrix compared to coarse Al2O3 particles.

Metal–support interface engineering of Ni catalysts for improved H2 storage performance: Grafting alkyltriethoxysilane onto commercial alumina

Tuning metal–support interface in supported Ni catalysts is a promising approach for overcoming the agglomeration of Ni particles and the low reducibility of Ni species. This study describes a facile two-step method to produce active Ni catalysts for the hydrogenation of benzyltoluene. In the first step, alkyltriethoxysilanes (CnTES, n = 1, 3, and 8) were grafted onto the surface of commercial Al2O3. The maximum Si/Al ratio of the prepared CnTES-on-Al2O3 materials was determined to be approximately 2.9 mol.%, which can vary depending on the surface properties of Al2O3. The second step was H2 reduction of the Ni precursor loaded on the CnTES-on-Al2O3 materials to remove alkyl substituents from the grafted CnTES and form Ni particles on the surface of silica grafted onto alumina (SGA). The hydrogenation performance of the obtained Ni/SGA_CnTES catalysts was improved with increasing Si/Al ratio owing to higher Ni dispersion and more abundant metallic Ni. The activity of the Ni/SGA_2.9CnTES (Si/Al = 2.9 mol.%) catalysts exhibited a volcano-shaped relationship with the length of the alkyl substituent of grafted CnTES, reaching the maximum for C3TES. Notably, Ni/SGA_2.9C3TES showed excellent ability for the adsorption of H2 and substrate, as well as high stability, resulting from the reduced agglomeration of Ni particles and the modulated metal–support interface. Therefore, the demonstrated synthesis approach can render Ni catalysts servable to promote the commercialization of liquid organic hydrogen carrier system.

Shaping of Porous CeO2 Powders into Highly Active Catalyst Carriers.

CeO2 is attracting more and more attention because of its outstanding performance in heterogeneous catalysis, as an active support and a reaction promoter in reactions of industrial interest. We herein describe a novel and scalable manufacturing process of mm-sized CeO2 spheres by a combination of extrusion and spheronization of CeO2 porous powders. In this study, wet paste formulation and fabrication procedures were optimized, and as a result methylcellulose was identified as the best plasticizer for paste extrusion to provide well-defined spherical shapes and smooth surfaces, as well as reproducible batches. After nickel impregnation (10 wt %), the catalytic performance of CeO2 supports was evaluated in the CO2 methanation reaction (T = 250-350 °C, P = 5 bar·g) and compared with that of commercial Al2O3 spheres doped or not with CeO2. These novel CeO2-based catalysts are easily reduced at a moderate temperature and more active than the Al2O3 analogues, particularly at low reaction temperatures and small reactor volumes, properties that make their implementation in emerging reactor configurations very promising.

The influence of the synthesis method on Gd2O3 morpho-structural properties and sensitivity to CO2 under in-field conditions

In this study, we report the implications of the synthesis method on Gd2O3 sensitivity to CO2. The rare-earth oxide was prepared by wet chemical co-precipitation and by hydrothermal method. The obtained powders labelled Gd2O3–CoP and Gd2O3-HT were deposited as thick films over commercial Al2O3 substrates provided with Pt electrodes and a back-side heater. Both powders consist of the same crystallographic phase, with a significant difference appearing in selected area electron diffraction patterns, transmission electron microscopy images at higher magnification and X-ray diffraction spectra, with respect to the crystallization degree. The associated role in sensing properties is revealed via electrical resistance variations determined by CO2 concentrations in the range between 400 and 3000 ppm and variable relative humidity between 0 and 50%RH, similar to the in-field atmosphere. The proposed CO2 interaction mechanism is based on phenomenological investigations which highlight the electronic affinity variation as the effect of dipoles induced by the in-field conditions on the Gd2O3 surface.

Comparative study of the mechanical properties after proton irradiation of Al2O3 and Si-SiC ceramics for fusion breeding blanket applications

In this work, a study on the compression and indentation behavior of ceramic samples previously proton irradiated was studied. Prismatic bars were processed from commercial Al2O3 99.7%, and Si-SiC tubes manufactured by slip casting and extrusion, respectively. At least ten probes from each batch were submitted to high energy H+ ion beams (approximately 4.5 MeV) up to a fluence of 1.0 × 1016 ions/cm2 at both sample sides. A beam degrader was located inside the irradiation chamber to distribute the ions homogeneously in the target volume. The mechanical responses of these materials were examined for application as breeding blankets in nuclear fusion reactors, and their behavior after implantation was compared with similar bars in the as-received condition. Compressive and micro-indentation tests were carried out, obtaining the samples compressive strength, elastic modulus, hardness, and fracture toughness values. In addition, their relationship with the microstructure was studied by scanning electron microscopy. After ion irradiation, both ceramics show a reduction in compressive behavior. However, if the ceramics are compared with each other, the compressive properties after ion-irradiation are superior in the Al2O3 ceramic. From micro-indentation tests, no change in the material properties (hardness and fracture toughness) due to ion implantation at different depths was evidenced.