Kunming University of Science and Technology

Hong Kong Baptist University

Yunnan University of Nationalities

Jun Wang

Lin Chen

Jing Feng

Xiaoyu Chong

Peng Wu

Zhenhua Ge

Peng Song

Zhaoxiang Bian

Aiping Lu

Albert Sun-Chi Chan

Chengyuan Lin

Baomin Fan

Qingjing Yang

Jianbin Xu

Jun Hu

Yunxuan Zhou

Fushuo Wu

Qi Zheng

Chao Huang

Kailong Yang

Chao Li

The present disclosure provides a high-entropy rare earth-toughened tantalate ceramic. The ceramic is prepared by sintering TaOpowder and x types of different REOpowder, 4≤x≤9, and the molar ratio of the REOpowders is 1. REOpowder and TaOpowder having the molar ratio of RE to Ta being 1:1 are weighed, a solvent is added for mixing, and ball milling is performed by a ball mill to obtain mixed powder M; the powder M is dried at a temperature of 650-850° C. for 1.5-2 h to obtain dried powder; the powder is sieved to obtain powder N, the powder N is placed in a mold for first pressing to obtain a rough blank, and the rough blank is then pressed for the second time to obtain a compact blank; the compact blank is sintered to obtain the high-entropy rare earth-toughened tantalate ceramic.

High-entropy rare earth-toughened tantalate ceramic and preparation method therefor

The present disclosure relates to the technical field of ceramic powder preparation, and discloses a zirconia/titania/cerium oxide doped rare earth tantalum/niobate RETa/NbOceramic powder and a preparation method thereof. A general chemical formula of the ceramic powder is RE(Ta/Nb)(Zr/Ce/Ti)O, 0&#x3c;x&#x3c;1, the crystal structure of the ceramic powder is orthorhombic, the lattice space group of the ceramic powder is C222, the particle size of the ceramic powder ranges from 10 to 70 &#x3bc;m, and particles of the ceramic powder are spherical. During preparation, the raw materials are ball-milled before a high temperature solid phase reaction, then mixed with a solvent and an organic binder to obtain a slurry C, then centrifuged and atomized to obtain dry pellets, and finally sintered to obtain a zirconia/titanium oxide/cerium oxide doped rare earth tantalum/niobate RETa/NbOceramic powder, which satisfies the requirements of APS technology for ceramic powders.

Zirconia/titanium oxide/cerium oxide doped rare earth tantalum/niobate RETa/NbO4 ceramic powder and preparation method thereof

The present disclosure belongs to the field of preparation technology and provides an ultralimit alloy and a preparation method therefor. The ultralimit alloy comprises an alloy matrix. A bonding layer and a ceramic layer are successively deposited on a surface of the alloy matrix. The alloy matrix includes one of a magnesium alloy matrix, an aluminium alloy matrix, a titanium alloy matrix, an iron alloy matrix, a nickel alloy matrix, a copper alloy matrix, a zirconium alloy, and a tin alloy. For an ultralimit magnesium alloy, an ultralimit aluminium alloy, an ultralimit nickel alloy, an ultralimit titanium alloy, an ultralimit iron alloy and an ultralimit copper alloy, the bonding layer is a composite bonding layer, the ceramic layer is a composite ceramic layer, and the outside of the composite ceramic layer is further successively deposited with a reflecting layer, a catadioptric layer, an insulating layer and a carbon foam layer.

Ultralimit alloy and preparation method therefor

The present invention relates to a type of norcantharidin analogues and a method to synthesis such norcantharidin analogues by transition metal-catalyzed alkynylation of 7-oxabenzonorbornadienes. The present invention also relates to the use of such norcantharidin analogues in manufacture of a medicament for the treatment of cancer tumors.

Asymmetric synthesis of norcantharidin analougus by alkynylation of oxabenzonorbornadienes and their anticancer activities

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Yunnan, China

Jun Wang