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Dive into the research topics where Yunxia Huang is active.

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Featured researches published by Yunxia Huang.


Materials Science and Engineering B-advanced Functional Solid-state Materials | 2003

Sensing properties of CuO–ZnO heterojunction gas sensors

Ying Hu; Xiaohua Zhou; Qiang Han; Quanxi Cao; Yunxia Huang

Abstract CuO–ZnO heterojunction gas sensor is a new type gas sensor and has many advantages, such as low cost, simple processing, and convenient testing, etc. In this work, the sensing properties of these sensors to gases were studied on the condition of different ratios of ZnO to CuO, including the resistance-temperature properties of various samples and their sensitivities and response behavior at different temperatures and in different gases. The obtained results are analyzed and discussed in this paper.


Materials Science and Engineering B-advanced Functional Solid-state Materials | 2003

ZnO varistor manufactured by composite nano-additives

Jianzhang Shi; Quanxi Cao; Yunge Wei; Yunxia Huang

Based on the analysis of the effects of ZnO grain boundaries, the new method of manufacturing ZnO varistors prepared by composite nano-additives is put forward in this paper. The emphasis of this technique is mainly on improving the microstructural uniformity and the effects of ZnO varistors grain boundaries so as to obtain the high quality components. As a result of the experiment, fine and active multiplex composite nano-additives are prepared by chemical coprecipitation, and highly uniform microstructure and larger surge absorption capability compared with the conventional oxide mechanical mixed technique are achieved. Moreover, this method is easy to perform and the shape of the obtained powders is apt to control. Also this new technique of manufacturing ZnO varistors is more feasible and of great prevalence in spawning ceramic materials among the existing equipments.


Journal of Rare Earths | 2010

Solution combustion synthesis and luminescence properties of (Y,Gd)Al3(BO3)4:Eu3+ phosphors

Guifang Li; Quanxi Cao; Zhimin Li; Yunxia Huang; Haiqing Jiang

Abstract Ultrafine Y 0.95- x Gd x Eu 0.05 Al 3 (BO 3 ) 4 phosphors with different Gd 3+ concentrations were prepared by a solution combustion method, and characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM). Results showed that the pure phase of YAl 3 (BO 3 ) 4 was obtained at 1000 °C and the prepared particle size varied with calcining temperatures. Photoluminescence spectra indicated that the dominant emission peak was observed at 612 nm due to the 5 D 0 → 7 F 2 transition of Eu 3+ . The luminescence intensity of Eu 3+ was affected by concentration of Gd 3+ in the Y 0.95- x Gd x Eu 0.05 Al 3 (BO 3 ) 4 host and the optimum concentration of Gd 3+ was x =0.75.


International Journal of Modern Physics B | 2002

A DESIGNING OF HETEROJUNCTION STRUCTURE OF N-Si/Si1-xGex HEMT

Ying Hu; Qiang Han; Xiaohua Zhou; Yunxia Huang; Yulong Xu

One has discussed the principle and method of designing the heterojunction structure of n-Si/Si1-xGex HEMT from the lattice match and the energy band discontinuity points, analysed and calculated the HEMT reported by K. Ismail and obtained 2DEG (two Dimension Electron Gas) density ns essentially according with the experiment data. Final the design of the heterojunction of K. Ismails HEMT is improved to get a higher 2DEG density ns.


Journal of Alloys and Compounds | 2009

Microwave dielectric properties of SiC(B) solid solution powder prepared by sol-gel

Zhimin Li; Wancheng Zhou; Tianmin Lei; Fa Luo; Yunxia Huang; Quanxi Cao


Journal of Alloys and Compounds | 2011

Effect of boron doping on microwave dielectric properties of SiC powder synthesized by combustion synthesis

Zhimin Li; Wancheng Zhou; Xiaolei Su; Fa Luo; Yunxia Huang; Cheng Wang


Journal of the American Ceramic Society | 2009

Effect of Synthesis Atmosphere on the Microwave Dielectric Properties of ZnO Powders

Yunxia Huang; Quanxi Cao; Zhimin Li; Haiqing Jiang; Yupeng Wang; Guifang Li


Journal of the American Ceramic Society | 2009

Dielectric Property of Aluminum-Doped SiC Powder by Solid-State Reaction

Zhimin Li; Wancheng Zhou; Xiaolei Su; Yunxia Huang; Guifang Li; Yupeng Wang


Journal of Alloys and Compounds | 2009

Photoluminescence properties of YAG:Tb nano-powders under vacuum ultraviolet excitation

Guifang Li; Quanxi Cao; Zhimin Li; Yunxia Huang; Yunge Wei; Junyan Shi


Materials Science and Engineering B-advanced Functional Solid-state Materials | 2011

Improving the dielectric properties of SiC powder through nitrogen doping

Zhimin Li; Wancheng Zhou; Fa Luo; Yunxia Huang; Guifang Li; Xiaolei Su

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Wancheng Zhou

Northwestern Polytechnical University

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Fa Luo

Northwestern Polytechnical University

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Xiaolei Su

Xi'an Polytechnic University

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