王育华
主要开展高亮度真空紫外发光材料及长余辉发光材料的创新研究、极端条件下新材料的合成及表征等方面的研究工作。
个性化签名
- 姓名:王育华
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学术头衔:
博士生导师, 优秀教师/优秀教育工作者, 教育部“新世纪优秀人才支持计划”入选者
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学科领域:
材料科学基础学科
- 研究兴趣:主要开展高亮度真空紫外发光材料及长余辉发光材料的创新研究、极端条件下新材料的合成及表征等方面的研究工作。
王育华,男,39岁,工学博士,教授,博士生导师,兰州大学物理科学与技术学院 功能与环境材料研究所所长,教育部磁学与磁性材料重点实验室、甘肃省材料物理与化学重点学科学术带头人。中国物理学会发光分会《发光学报》编委,甘肃省青年联合会第八届委员会委员。1989年7月于陕西师范大学化学系本科毕业并获得学士学位。1992年7月于兰州大学材料科学系研究生毕业并获得理学硕士学位。1997年10月国家公派赴日本国东北大学工学院材料化学系材料化学方向攻读博士研究生,并于2001年3月博士毕业并取得工学博士学位。1992年9月硕士毕业后留校工作至今。先后被兰州大学物理科学与技术学院材料科学系聘为助教、讲师、副教授、硕士生导师。2003年1月被聘为教授、2004年1月被聘为材料物理与化学方向博士生导师。教学方面,给大学本科材料物理与化学专业主讲固体化学、无机材料制备、物理化学、材料科学专题讲座等课程,面向研究生开设固体化学、晶体缺陷物理、陶瓷材料学等课程。在科研方面,主要开展高亮度真空紫外发光材料及长余辉发光材料的创新研究、极端条件下新材料的合成及表征等方面的研究工作。完成本人主持的科技部国家重大基础研究前期专项一项,留学回国启动基金一项。目前主持科技部国家863计划一项,国家自然科学基金一项,高等学校博士点基金一项,教育部科学研究重点项目一项。2002年获得教育部优秀青年资助计划,2004年入选“教育部新世纪优秀人才支持计划”。到目前为止,在《高等学校化学学报》,《Chemistry Letters》,《J. Electrochem. Soc.》,《J. Solid State Chem.》,《J. Crystal Growth》等国内外核心刊物上发表论文40余篇,申请中国发明专利5项。被《J. Solid State Chem.》,《Mater. Res. Bull.》,《J. Mater. Sci.》,《高等学校化学学报》,《发光学报》,《液晶与显示》等杂志聘为特约审稿人。中国物理学会发光分会《发光学报》编委,日本化学会会员,日本陶瓷学会会员,新加坡材料学会会员,美国材料学会会员。
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431
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成果数
10
王育华, Yu Hua Wang, Xuan Guo, Tadashi Endo, Yukio Murakami, Mizumoto Ushirozawa
Journal of the SID 12/4(1),2004,-0001,():
-1年11月30日
The broad bands at around 155nm for GdAl3(BO3)4:Eu, at 184nm for Ca4GdO(BO3)3:Eu, at 183nm for Gd2SiO5:Eu, and at 170nm for GdAlO3:Eu were observed. These bands were assigned to the charge-transfer (CT) transition of Gd3+-O2-. In the excitation spectrumof (Gd,Y)BO3:Eu, a broadened excitation band was observed in VUV region. It could be considered that this band was composed of two bands at about 160 and 166nm. The preceding band was assigned to the BO3 group absorption. The later one at about 166nm could be assigned to the CT transition of Gd3+-O2-, according to the result of GdAl3(BO3)4:Eu, Ca4GdO(BO3)3:Eu, Gd2SiO5:Eu, and GdAlO3:Eu. The excitation spectra overlapped between the CT transition of Gd3+- O2- and BO3 groups absorption. It caused the emission of Eu3+ to take place effectively in the trivalent europium-doped (Gd, Y)BO3 host lattice under 147-nm excitation.
Yttrium gadolinium orthoborate phosphor,, CT transition,, energy transition.,
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王育华, 何玲
高等学校化学学报,2004,25(9):1585~1588,-0001,():
-1年11月30日
用水热法在低于300℃成功地制备出具有不同形貌的YBO3:Eu3+荧光粉,其反应温度比固相反应降低了约800℃。研究了初始原料、pH值、反应温度、反应溶剂和催化剂等条件对目的产物形貌及粒度的影响。得到了具有Vaterite结构、粒度分布均匀的球形荧光粉的最佳合成工艺。在254 rim激发下,水热法制备的球形Y Euo-o BO3荧光粉最强发射峰位于598rim处,属于Eu抖的 D。一的跃迁,是固相反应所得样品的1.5倍。这些结果表明,在PDP和荧光灯等显示和照明用荧光粉的制备中水热法具有潜在的应用前景。
水热法, YBO3: Eu3+, , 形貌控制, 荧光粉
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王育华, Yuhua Wang, a Kyoto Uheda, a Hirotsugu Takizawa, a Ushirozawa Mizumoto, b and Tadashi Endoa, z
Journal of The Electrochemical Society, 148 (8) G430-G433 (2001),-0001,():
-1年11月30日
Single phase europium-activated gadolinium aluminum borate, Gd1-xEuxAl3(BO3)4 (0<x<1) was obtained by the evaporation of its nitrate solution, and calcination at 900 to 1100C in air. All the solid solution was identified as the isomorphs of huntite. Eu31 activated GdAl3(BO3)4 showed intense red emission with CIE chromaticity coordinates of (0.645, 0.330) under 147nm excitation. According to the excitation and emission spectra, the red emission of Eu31 was decreased under excitation of the vacuum ultraviolet (VUV) region (158-160nm), and increased under excitation UV region (258-260nm) with the increase of Eu31 concentration. In comparison with the absorption data of borates, the 158 nm excitation peak was assigned to the energy level of BO3 groups. In excitation spectra, the sharp 274nm peak, corresponding to the 8S72→6I2/11 transition of Gd31 in addition to the f-f transitions of Eu31 were observed. Consequently, the emission of Eu31 was induced by the energy transfer of VUV excitation to the activator Eu31 ions via the co-activator Gd31 in GdAl3(BO3)4.
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王育华, Yuhua Wanga, *, Tadashi Endob, Ling Hea, Chunfang Wua
Journal of Crystal Growth 268(2004)568-574,-0001,():
-1年11月30日
Vaterite-type GdBO3:Eu3+ phosphor was first prepared by using a mild hydrothermal method. GdBO3:Eu3+ phosphor was fairly controlled as high purity, homogeneous, stoichiometric, uniform plate morphology and nonaggregation powders. The typical powders were plate shaped and 1.6-2.0mm in size. As the synthesis temperature was below 300 C, the recovered phosphor had never been subjected to the phase transition to the calcite type during the chemical reaction. The phosphor showed the excitation band peaked at about 239nm, and the emission band peaked at about 591nm had twice the intensity compared with the conventional phosphor. The excitation and emission peaks were somewhat shifted to shorter wavelength. The GdBO3:Eu3+ phosphor showed maximum intensity in emission for the doped 20 at.% of Eu3+ upon 239nm excitation and 10at.% Eu3+ under 146nm excitation, respectively. Therefore, the energy relaxation pathway to the Eu3+ sites should be different. Also, the partial substitution of Y3+ for Gd3+ was very convenient to improve the emission intensity of Eu3+ under 146nm excitation, whereas the emission intensity was decreased with increasing Y3+ concentration under 239nm excitation.
A1., Hydrothermal synthesis, A1., Photoluminescence, B1., Rare earth orthoborates
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【期刊论文】Identification of charge transfer (CT) transition in (Gd,Y)BO3:Eu phosphor under 100-300nm
王育华, Yuhua Wang, a, * Xuan Guo, a Tadashi Endo, b Yukio Murakami, c and Mizumoto Ushirozawac
Journal of Solid State Chemistry 177(2004)2242-2248,-0001,():
-1年11月30日
A broad excitation band in an excitation spectrum of (Gd,Y) BO3:Eu was observed in the VUV region. It could be considered that this band was composed of two bands at about 160 and 166nm. The preceding band was assigned to the BO3 group absorption. The later one at about 166nm could be assigned to the charge transfer (CT) transition of Gd3+-O2. Such an assignment was deduced from the result that broadbands at around 170nm for GdAlO3:Eu, and at 183nm for Gd2SiO5:Eu are due to the CTtransition of Gd3+-O2; this was also identified by CaZr (BO3)2:Eu. Since there are no Gd3+ ions in it; a weak band in the VUV region in the excitation spectrum of Ca0.95ZrEu0.05(BO3)2 was observed. The excitation spectra were overlapped between the CT transition of Gd3+-O2 and BO3 group absorption, and it caused the emission of Eu3+ effectively in the trivalent europium-doped (Gd, Y)BO3 host lattice under 147nm excitation. Intense broad excitation bands were observed at about 155nm for YBO3:Eu and at about 153nm for YAlO3:Eu; it could be attributed to the CTtransition between Y3+ and O2. As a result, under the xenon discharge (147nm) excitation, the intense emission of Eu3+ in GdBO3 was found to be more convenient just because of the partial substitution of Y3+ for Gd3+.
Yttrium gadolinium orthoborate phosphor, CTtransition, Energy transition
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【期刊论文】BaMgAl10O17:Eu2+荧光粉的化学共沉淀法合成及其发光性质*
王育华, 张占辉, 都云昆
功能材料,2004,5(35):621~628 ,-0001,():
-1年11月30日
以(NH4)2CO3为沉淀剂采用化学共沉淀法在1350℃成功合成了单相Ba1-x Eu xMgAl10O17(0.02≤x≤0.14)蓝色荧光粉。合成温度比传统的高温固相法降低了约250℃。制备的荧光粉颗粒呈准球状形貌,分布均匀且无烧结,晶粒尺寸在0.3μm左右。在254nm紫外光激发下,发射光谱的最大峰值在450nm附近,发射强度比高温固相法提高了大约15%。当x=0.10时发射强度最高。
BaMgAl10O17: Eu2+, , 荧光粉, 化学共沉淀法合成
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【期刊论文】GdBO3: Eu Phosphor Particles with Uniform Size, Plate Morphology, and Non-Aggregation
王育华, Yuhua Wang, Kyota Uheda, Hirotsugu Takizawa, and Tadashi Endo*
,-0001,():
-1年11月30日
GdBO3: Eu vaterite type particles with fine size, plate morphology, and non-aggregation were first prepared by the mild hydrothermal method. Their characteristics were investigated and compared with those of particles prepared by solid state reactions. The result showed that the hydrothermal method appears to be applicable to prepare high quality phosphors for practical uses. This conclusion was reinforced by the existence of an important improvement in the photoluminescent performances.
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【期刊论文】Photoluminescence of Zn2SiO4: Mn2+ Prepared by Combustion Technique X
王育华, Hao Yan, Wang Yuhua, *, Zhang Zhanhui
J OURNAL OF RARE EARTHS Vol.21, Suppl., Dec. 2003, p. 28,-0001,():
-1年11月30日
anganese-doped zinc silicate powder samples were prepared successfully by solution combustion process, and their photoluminescence were investigated in ultraviolet region. The single-phase of Zn2-xSiO4: xMn (0≤x≤0.10, willemite) was obtained by combustion synthesis at 600℃for afew minutes, then heat treated at above 900℃ for 4h. In the excitation spectra of Zn2-xSiO4: xMn (0<x≤0.10), the strongest broad band at about 254nm is observed and as-signed to 6A1→4T1 transition of Mn2+ monitoring at 525nm emission. At about 525nm, the intense broad band emission is observed under 254nm excitation in Zn2-xSiO4: xMn (0<x≤0.10). This broad band is attributed to 4T1→6A1 transi-tion of Mn2+. The results indicate that photoluminescence efficiency, the location of the strongest excitation or emission band, and the optimum concentration of activator depend on starting materials, combustion temperatures, the dosage of fu-els, and the size of powder samples etc.
Zn2SiO4 Mn, combustion technique, phosphors, rare earths
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【期刊论文】Luminescence of Eu3+in LnAlO3 (Ln=Gd, Y) under UVand VUV Excitation
王育华, Wang Yuhua , *, Endo Tadshi, Li Feng
J OURNAL OF RARE EARTHS Vol.22, No.1, Feb. 2004, p.95,-0001,():
-1年11月30日
Single phases of LnAlO3: Eu3+(Ln=Gd, Y) were obtained by the process of evaporation of their nitric acid so-lution, and then pyrolysis of their nitrate salts. On monitoring by 613nm emission, broad bands at around 270 and 170nm were observed in the excitation spectrum of Gd0.95Eu0.05AlO3. These peaks could be as igned to charge transfer (CT) transitions of Eu3+-O2- and Gd3+-O- respectively. All the transitions observed in Gd0.95Eu0.05AlO3 are faithfully repro-duced in the Y0. 95Eu0. 05AlO3, but with an exception of the 8S7/2→6I11/2 transition of Gd3+The 153nm broad band could be the CT transition of Y3+-O-. Accordingly, the efficiency luminescence of (Gd, Y)BO3: Eu3+ was explained as a result of CT transitions of Gd3+-O- and Y3+-O- under 147nm excitation. Under VUV excitation, Gd0.95Eu0.05AlO3 exhibits a bright red luminescence with CIE chromaticity coordinates of (0.623, 0.335) with a PL intensity of 30 of the commercial phosphor (Gd, Y) BO3: Eu3+ (KX2504A). The PL spectrum of Y0.95Eu0.05AlO3 is similar to that of Gd0.95Eu0.05AlO3. Cal-culation of the color coordinates gives x=0.636, y=0.340 with a PL intensity of 50 of the (Gd, Y) BO3: Eu3+(KX2 504A) for Y0.95Eu0. 05AlO3, and confirms that it has the appearance of pure spectral red, corresponding approximately to 608nm. It can be concluded that LnAlO3: Eu3+is a promising red VUV phosphor.
VUV phosphors, rare earth aluminates, charge transfer transition, rare earths CLC number
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【期刊论文】Luminescence properties of Ca4GdO(BO3)3: Eu in ultraviolet and vacuum ultraviolet regions
王育华, Yuhua Wang a, *, Tadshi Endo b, Erqing Xie c, Deyan He c, Bin Liu a
Y. Wang et al./Microelectronics Journal 35(2004)357-361,-0001,():
-1年11月30日
The luminescent properties of Ca4GdO(BO3)3: Eu3+ were investigated under excitation of UV and VUV light. Separate two broad bands at around 259 and 184nm were observed in the excitation spectrum of Ca4GdO(BO3)3: Eu3+. These peaks were assigned to the charge transfer transition of Eu3+-O22 and Gd3+-O22, respectively. Owing to the favorable spectral position in their broad intense excitation band, Eu3+ ions show a intense emission under 258nm excitation in Ca4GdO(BO3)3: Eu3+. This spectral position was determined by the free oxygen ions O (1). Ca4GdO(BO3)3 doped with Eu3+ ion seems to be a preferable candidate as red lamp phosphor. On the other hand, a weak band with a maximum at about 184 nm was observed below 200 nm in the excitation spectrum of Ca4GdO(BO3)3: Eu3+. This phosphor do not emit effectively under the 147 nm excitation. This unfavorable profile was also due to the O (1) ions, which played a role to the shifting towards the lower energy sides. The luminescence of Eu3+ ions in Ca4GdO(BO3)3 was somewhat different from that observed in the other borates phosphors, but resembled to those observed in the oxide phosphors (e.g. Gd2O3, Y2O3 and Gd2SiO5). Such behavior was recognized by the detailed analysis of crystallographical surroundings around activator.
VUV phosphors, Gadolinium calcium oxoborate, Charge transfer transition
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