The formation strength plateau of ceramics is addressed. A set of of 99A1203 are conducted, mechanism of the residual subjected to thermal shock thermal shock experiments where the thin specimens of 1 mm× 10 mm&...The formation strength plateau of ceramics is addressed. A set of of 99A1203 are conducted, mechanism of the residual subjected to thermal shock thermal shock experiments where the thin specimens of 1 mm× 10 mm×50 mm exhibit parallel through edge cracks, and thus permit quantitative measurements of the crack patterns. The cracks evolve with the severity of ther- mal shock. It is found that there is a correlation between the length and density of the thermal shock cracks. The increase of crack length weakens the residual strength, whereas the increase of crack density improves it. In a considerably wide temperature range, the two contrary effects just counteract each other; consequently a plateau appears in the variation curve of the residual strength. A comparison between the numerical and experimental results of the residual strength is made, and they are found in good agreement. This work is helpful to a deep understanding of the thermal shock failure of ceramics.展开更多
Ceramic tiles are one of the most indispensable materials for interior decoration.The ceramic patterns can’t match the design requirements in terms of diversity and interactivity due to their natural textures.In this...Ceramic tiles are one of the most indispensable materials for interior decoration.The ceramic patterns can’t match the design requirements in terms of diversity and interactivity due to their natural textures.In this paper,we propose a sketch-based generation method for generating diverse ceramic tile images based on a hand-drawn sketches using Generative Adversarial Network(GAN).The generated tile images can be tailored to meet the specific needs of the user for the tile textures.The proposed method consists of four steps.Firstly,a dataset of ceramic tile images with diverse distributions is created and then pre-trained based on GAN.Secondly,for each ceramic tile image in the dataset,the corresponding sketch image is generated and then the mapping relationship between the images is trained based on a sketch extraction network using ResNet Block and jump connection to improve the quality of the generated sketches.Thirdly,the sketch style is redefined according to the characteristics of the ceramic tile images and then double cross-domain adversarial loss functions are employed to guide the ceramic tile generation network for fitting in the direction of the sketch style and to improve the training speed.Finally,we apply hidden space perturbation and interpolation for further enriching the output textures style and satisfying the concept of“one style with multiple faces”.We conduct the training process of the proposed generation network on 2583 ceramic tile images dataset.To measure the generative diversity and quality,we use Frechet Inception Distance(FID)and Blind/Referenceless Image Spatial Quality Evaluator(BRISQUE)metrics.The experimental results prove that the proposed model greatly enhances the generation results of the ceramic tile images,with FID of 32.47 and BRISQUE of 28.44.展开更多
Inorganic compounds with fluorite-related structures are among the well-known multifunctional materials.In this work,Y_(10)Ta_(4)O_(25):Eu^(3+)with a fluorite-related structure was prepared using the ceramic synthesis...Inorganic compounds with fluorite-related structures are among the well-known multifunctional materials.In this work,Y_(10)Ta_(4)O_(25):Eu^(3+)with a fluorite-related structure was prepared using the ceramic synthesis method.XRD patterns and Rietveld refinements were used to verify the phase formation with an orthorhombic space group of Cmmm(65).The relationship between the luminescence properties and structural characteristics was studied in detail.Compared with earlier reported phosphors,Y_(10)Ta_(4)O_(25):Eu^(3+)exhibits peculiar luminescence characteristics.The transition peaks from ^(5)D_(0) to ^(7)F_(1),^(7)F_(2),and ^(7)F_(4)(570-720 nm)all showed fairly strong intensities,and emission transitions from the high excited states ^(5)D_(1,2,3) were detected at room temperature,etc.The experiments confirmed that the peculiar luminescence of Y_(10)Ta_(4)O_(25):Eu^(3+)is due to its distinctive structure,such as the strong covalent nature and high polarizability of the(Y/Eu)O8 polyhedron in the lattice.The doping mechanism was investigated using the spectroscopy probe of Eu^(3+)by laser site-selective excitation and emission in the ^(5)D_(0)→^(7)F0 region.Eu^(3+)ions mostly tend to preferentially occupy the Y1 sites first,which show shorter bond lengths and significant electronic repulsion in the(Y/Eu)O8 polyhedron.The phosphor exhibited a high quantum efficiency of 45% and good thermal stability.Some light-emitting diode lighting devices were fabricated by encapsulating the phosphors and near-UV chip together with resin,and the structures showed a bright reddish-orange color.The photoluminescence characteristics indicated that the Y_(10)Ta_(4)O_(25):Eu^(3+)phosphor is promising for LEDs.The results are helpful in developing new reddish-orange emitting materials by introducing Eu^(3+)as a structural probe for doping sites and microstructures.展开更多
基金supported by the National Natural Science Foundations of China (10972020,11061130550)Fundamental Research Funds for the Central UniversitiesNational Agency for Research of France (International project T-shock)
文摘The formation strength plateau of ceramics is addressed. A set of of 99A1203 are conducted, mechanism of the residual subjected to thermal shock thermal shock experiments where the thin specimens of 1 mm× 10 mm×50 mm exhibit parallel through edge cracks, and thus permit quantitative measurements of the crack patterns. The cracks evolve with the severity of ther- mal shock. It is found that there is a correlation between the length and density of the thermal shock cracks. The increase of crack length weakens the residual strength, whereas the increase of crack density improves it. In a considerably wide temperature range, the two contrary effects just counteract each other; consequently a plateau appears in the variation curve of the residual strength. A comparison between the numerical and experimental results of the residual strength is made, and they are found in good agreement. This work is helpful to a deep understanding of the thermal shock failure of ceramics.
基金funded by the Public Welfare Technology Research Project of Zhejiang Province(Grant No.LGF21F020014)the Opening Project ofKey Laboratory of Public Security Information Application Based on Big-Data Architecture,Ministry of Public Security of Zhejiang Police College(Grant No.2021DSJSYS002).
文摘Ceramic tiles are one of the most indispensable materials for interior decoration.The ceramic patterns can’t match the design requirements in terms of diversity and interactivity due to their natural textures.In this paper,we propose a sketch-based generation method for generating diverse ceramic tile images based on a hand-drawn sketches using Generative Adversarial Network(GAN).The generated tile images can be tailored to meet the specific needs of the user for the tile textures.The proposed method consists of four steps.Firstly,a dataset of ceramic tile images with diverse distributions is created and then pre-trained based on GAN.Secondly,for each ceramic tile image in the dataset,the corresponding sketch image is generated and then the mapping relationship between the images is trained based on a sketch extraction network using ResNet Block and jump connection to improve the quality of the generated sketches.Thirdly,the sketch style is redefined according to the characteristics of the ceramic tile images and then double cross-domain adversarial loss functions are employed to guide the ceramic tile generation network for fitting in the direction of the sketch style and to improve the training speed.Finally,we apply hidden space perturbation and interpolation for further enriching the output textures style and satisfying the concept of“one style with multiple faces”.We conduct the training process of the proposed generation network on 2583 ceramic tile images dataset.To measure the generative diversity and quality,we use Frechet Inception Distance(FID)and Blind/Referenceless Image Spatial Quality Evaluator(BRISQUE)metrics.The experimental results prove that the proposed model greatly enhances the generation results of the ceramic tile images,with FID of 32.47 and BRISQUE of 28.44.
基金supported by the National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)(2020R1F1A1049740)the National Natural Science Foundation of China(NSFC)(Grant No.62074019 and 62174016)+1 种基金the Suzhou Science and Technology Project(Grant No.SZS2020313)Xifeng Yang and Yushen Liu also acknowledge the support of the Qing Lan Project of Jiangsu Province.
文摘Inorganic compounds with fluorite-related structures are among the well-known multifunctional materials.In this work,Y_(10)Ta_(4)O_(25):Eu^(3+)with a fluorite-related structure was prepared using the ceramic synthesis method.XRD patterns and Rietveld refinements were used to verify the phase formation with an orthorhombic space group of Cmmm(65).The relationship between the luminescence properties and structural characteristics was studied in detail.Compared with earlier reported phosphors,Y_(10)Ta_(4)O_(25):Eu^(3+)exhibits peculiar luminescence characteristics.The transition peaks from ^(5)D_(0) to ^(7)F_(1),^(7)F_(2),and ^(7)F_(4)(570-720 nm)all showed fairly strong intensities,and emission transitions from the high excited states ^(5)D_(1,2,3) were detected at room temperature,etc.The experiments confirmed that the peculiar luminescence of Y_(10)Ta_(4)O_(25):Eu^(3+)is due to its distinctive structure,such as the strong covalent nature and high polarizability of the(Y/Eu)O8 polyhedron in the lattice.The doping mechanism was investigated using the spectroscopy probe of Eu^(3+)by laser site-selective excitation and emission in the ^(5)D_(0)→^(7)F0 region.Eu^(3+)ions mostly tend to preferentially occupy the Y1 sites first,which show shorter bond lengths and significant electronic repulsion in the(Y/Eu)O8 polyhedron.The phosphor exhibited a high quantum efficiency of 45% and good thermal stability.Some light-emitting diode lighting devices were fabricated by encapsulating the phosphors and near-UV chip together with resin,and the structures showed a bright reddish-orange color.The photoluminescence characteristics indicated that the Y_(10)Ta_(4)O_(25):Eu^(3+)phosphor is promising for LEDs.The results are helpful in developing new reddish-orange emitting materials by introducing Eu^(3+)as a structural probe for doping sites and microstructures.
