Influence of layer thickness on microstructure and dielectric properties of Mg2TiO4 microwave ceramics fabricated by vat photopolymerization

Liu, Fei; He, Hong; Cheng, Lan; Li, Hao; Bian, Haizhou; Liu, Shaojun

doi:10.1016/j.addma.2023.103413

Cited by 4 publications

(6 citation statements)

References 39 publications

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“…In the 3D printing procedure (Fig. 2a ), the μHSR structure was established using SolidWorks software (Dassault Systemes, USA) and then sliced into slicing software (BMF Precision Tech, Inc., China) 51 . Subsequently, the digital micromirror device (DMD) on the PμSL equipment is used to control the deflection of each micromirror on the chip according to the two-dimensional data obtained after slicing.…”

Section: Resultsmentioning

confidence: 99%

A 3D-printed microhemispherical shell resonator with electrostatic tuning for a Coriolis vibratory gyroscope

Hou,

Zhu,

et al. 2024

Microsyst Nanoeng

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The emergence of microhemispherical resonant gyroscopes, which integrate the advantages of exceptional stability and long lifetime with miniaturization, has afforded new possibilities for the development of whole-angle gyroscopes. However, existing methods used for manufacturing microhemispherical resonant gyroscopes based on MEMS technology face the primary drawback of intricate and costly processing. Here, we report the design, fabrication, and characterization of the first 3D-printable microhemispherical shell resonator for a Coriolis vibrating gyroscope. We remarkably achieve fabrication in just two steps bypassing the dozen or so steps required in traditional micromachining. By utilizing the intricate shaping capability and ultrahigh precision offered by projection microstereolithography, we fabricate 3D high-aspect-ratio resonant structures and controllable capacitive air gaps, both of which are extremely difficult to obtain via MEMS technology. In addition, the resonance frequency of the fabricated resonators can be tuned by electrostatic forces, and the fabricated resonators exhibit a higher quality factor in air than do typical MEMS microhemispherical resonators. This work demonstrates the feasibility of rapidly batch-manufacturing microhemispherical shell resonators, paving the way for the development of microhemispherical resonator gyroscopes for portable inertial navigation. Moreover, this particular design concept could be further applied to increase uptake of resonator tools in the MEMS community.

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Section: Resultsmentioning

confidence: 99%

A 3D-printed microhemispherical shell resonator with electrostatic tuning for a Coriolis vibratory gyroscope

Hou,

Zhu,

et al. 2024

Microsyst Nanoeng

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show abstract

“…As a result, anisotropic surface roughness causes a reduction in dimensional accuracy of DLP formed sintered ceramic components. 25 Therefore, manipulating the stair-stepping microstructure can be considered as an effective approach to enhance quality of side surfaces and attenuate anisotropic degree of surface quality. Liu et al optimized quality of side surfaces of DLP-printed Mg 2 TiO 4 ceramic parts by adjusting printing layer thickness.…”

Section: Introductionmentioning

confidence: 99%

“…Liu et al optimized quality of side surfaces of DLP-printed Mg 2 TiO 4 ceramic parts by adjusting printing layer thickness. 25 Xu et al reported that increasing nano-silica powder content was favorable for decreasing printing interlayer space and surface roughness on side surfaces for DLP fabricated silica ceramic cores. 24 However, to date, few studies have elucidated the relationship between stair-stepping microstructure and surface quality for ZTA composites fabricated using DLP technology, thereby greatly limiting its applications in the field of dental restoration and repairation.…”

Section: Introductionmentioning

confidence: 99%

“…However, the stair‐stepping microstructure of ceramic parts formed by DLP results in a pronounced increase in roughness of side surfaces, which cannot be avoided during the layer‐by‐layer forming process of DLP technology. As a result, anisotropic surface roughness causes a reduction in dimensional accuracy of DLP formed sintered ceramic components 25 . Therefore, manipulating the stair‐stepping microstructure can be considered as an effective approach to enhance quality of side surfaces and attenuate anisotropic degree of surface quality.…”

Section: Introductionmentioning

confidence: 99%

“…Liu et al. optimized quality of side surfaces of DLP‐printed Mg 2 TiO 4 ceramic parts by adjusting printing layer thickness 25 . Xu et al.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of ZTA crowns with simultaneously improved isotropy on mechanical property and surface quality by DLP

Zhou,

Zhang,

Zhang

2023

Int J Applied Ceramic Tech

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Zirconia‐toughened alumina (ZTA) composite ceramics show great potential for use in dental repair applications due to their unique properties. Complex‐shaped ZTA all‐porcelain crowns can be accurately fabricated using digital light processing (DLP) technology. However, effectively controlling both the anisotropy on mechanical property and surface quality of ZTA composites shaped by DLP remains a critical challenge that requires further research and innovation. In this work, we propose an efficient method to synchronously enhance the isotropy on mechanical performance and surface quality of DLP formed ZTA all‐porcelain crowns by controlling contents of yttria‐stabilized zirconia (YSZ) powders. When enhancing contents of YSZ from 5 to 20 wt%, multilayer microstructure with obvious interlayer gaps transformed into uniform microstructure with strong interlayer bonding, and the smaller alumina grain was observed on the stair‐stepping microstructure. Finally, the ZTA composites exhibited flexural and comprehensive strength as high as 640.3 and 6.9 MPa, and dimensional precision as low as 37.5 and 43.5 μm on top and side surface, together with simultaneously enhanced isotropy on mechanical property and surface quality, well satisfying the demands for all‐porcelain crowns fabricating. This study provides thorough understandings on isotropy regulating of DLP‐shaped ZTA all‐porcelain crowns with excellent mechanical performance and surface quality.

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Enhancing mechanical integrity of vat photopolymerization 3D printed hydroxyapatite scaffolds through overcoming peeling defects

Liang,

Hu,

et al. 2024

Journal of the European Ceramic Society

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Influence of layer thickness on microstructure and dielectric properties of Mg2TiO4 microwave ceramics fabricated by vat photopolymerization

Cited by 4 publications

References 39 publications

A 3D-printed microhemispherical shell resonator with electrostatic tuning for a Coriolis vibratory gyroscope

A 3D-printed microhemispherical shell resonator with electrostatic tuning for a Coriolis vibratory gyroscope

Fabrication of ZTA crowns with simultaneously improved isotropy on mechanical property and surface quality by DLP

Enhancing mechanical integrity of vat photopolymerization 3D printed hydroxyapatite scaffolds through overcoming peeling defects

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