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Synthesis，Proton　Conductivity　and　High－Temperature　humidity　sensing　property　of　Zr（HPO_4）_2·H_2O　and　Its　Aluminium－substituted　Compositions

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Chemical Research in Chinese Universities 1996年第4期12卷 313-321页

作者： WANG Ge and FENG Shou-hua(Key Laboratory of Inorganic Hydrothermal Synthesis,)Department of Chemistry,Jilin University,Changchun,130023)WANG Bo and Martha Greenblatt(Deparrment of Chemistry,Rutgers,The State University of New Jersey,New Brenswick,NJ 08903 JILIN UNIV DEPT CHEMKEY LAB INORGAN HYDROTHERMAL SYNTHCHANGCHUN 130023PEOPLES R CHINA RUTGERS STATE UNIV DEPT CHEMNEW BRUNSWICKNJ 08903

A series of aluminium-containing α-type hydrated zirconium hydrogen phosphates,Zr_(1-x)Alx (H_(1+x/2)PO_4 )_2 with x=0-0.06,were hydrothermally synthesized and characterizedby means of X-ray diffraction,differential thermal analysis and thermogravimetric *** proton conductivity,1.2×10￣(-4) S·cm￣(-1)at 180℃ was found in Zr_(0.98)Al_(0.02)(H_(1.01)PO_4)_2·H_***-sensing measurements were carried out at 120℃ and 140℃ *** a limited substitution of Al for Zr can enhance both proton conductivity and humidity sensitivity.

关键词： s:Aluminium-containing α-type hydrated zirconium hydrogen phosphates Proton conductivity humidity sensing property

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Synthesis,Proton Conductivity and humidity sensing property ofγ-Type Zirconium Hydrogen Phosphate,Zr(HPO_4)_2·2H_2O

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Chemical Research in Chinese Universities 1999年第1期15卷 7-11页

作者： FENG Shou-hua ZHAO Hui LI Lian-sheng Martha Greenblatt Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin UniversityChangchun 130023 Department of Chemistry Rutgersthe State University of New JerseyPiscatawayNJ 08855USA

A γ - type of layered zirconium hydrogen phosphate, Zr(HPO 4) 2·2H 2O( γ ZrP), was synthesized under hydrothermal conditions and characterized by powder X ray diffraction and thermogravimetric analysis. The temperature dependence of the proton conductivity in γ ZrP was investigated in a temperature range of 23￣413 ℃ by ac impedance spectroscopy. The variation of the conductivity with water loss and phase transitions was observed. The best proton conductivity in γ ZrP is 6×10 -4 S·cm -1 at 60 ℃. The proton conductivities in the dehydrated sample are ￣10 -5 at 150 ℃ and ￣10 -4 S·cm -1 at 350 ℃, respectively. The conductivities as a function of humidity in the temperature range of 120￣200 ℃ were measured.

关键词： Synthesis γ-Type zirconium hydrogen phosphate Proton conductivity humidity sensing property

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Dielectric Properties of Capacitive-Type humidity Sensor Made under Different Pressures

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稀有金属材料与工程 2006年第A3期35卷 366-368页

作者： Jing Wang Xiao-hua Wang School of Electron and Information Engineering Dalian University of Technology Dalian 116023 China Department of Computer Science and Information Shanghai University of Electric Power Shanghai 200090 China

Capacitive humidity sensors were made of nanometer barium *** pellets were prepared under different pressures between 3920N to 7850N *** capacitance changes in three orders of magnitude in the relative humidity range of 10%～98%,indicating high humidity sensitivity of the *** a certain measuring frequency,the capacitance of the sensors increases as increasing of the preparation pressure,while the sensitivity of the sensors basically remains the *** frequencies corresponding to the peaks of the dielectric loss of the sensors move to the higher frequency direction as increasing of the relative *** a certain humidity,the frequencies corresponding to the peaks of the dielectric loss move to the higher frequency direction as increasing of the preparation pressure.

关键词： humidity sensor capacitive-type preparation pressure humidity sensing property

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Dielectric Properties of Capacitive-Type humidity Sensor Made under Different Pressures

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稀有金属材料与工程 2006年第S3期 366-368页

作者： Jing Wang~1 Xiao-hua Wang~2 (1.School of Electron and Information Engineering,Dalian University of Technology,Dalian 116023,China) (2.Department of Computer Science and Information,Shanghai University of Electric Power,Shanghai 200090,China)

关键词： humidity sensor capacitive-type preparation pressure humidity sensing property

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