Query：
学者姓名：汤德平
Refining：
Year
Type
Indexed by
Source
Complex
Former Name
Co-
Language
Clean All
Abstract ：
Sintering characteristics, phase evolutions, microstructures, and microwave dielectric properties have been investigated for BaTi4O9 ceramics prepared by traditional low temperature sintering using CuO-TiO2 (CT) additions as aids. The sintering temperature of BaTi4O9 ceramics was found to evidently reduce from 1350 degrees C to about 1100 degrees C with a very small amount of 0.5 wt% CT addition. When the CT addition increased to beyond 0.5 wt%, however, it was not expected to further lower the sintering temperature. Meantime, the secondary phases of Ba4Ti13O30, BaTiO3, and TiO2 were observed in these BaTi4O9-based ceramics when the CT content was beyond 2 wt%. With the introduction of the CT addition, the permittivity (epsilon) had little enhancement, and the temperature coefficient of the resonant frequency (tau(f)) was improved to near zero. The BaTi4O9 ceramics with 0.5 wt% CT additions, sintered at 1100 degrees C, exhibited excellent microwave dielectric properties, such as epsilon = 36.9, Q x f = 23100 GHz, and tau(f) = 2.5 ppm/degrees C. In addition, the densification mechanism and variations of the microwave dielectric properties have also been discussed with the crystal phase and microstructure's evolution.
Keyword ：
BaTi4O9 BaTi4O9 CuO-TiO2 CuO-TiO2 microwave dielectric properties microwave dielectric properties sintering characteristics sintering characteristics
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Guo, Haoxuan , Zhu, Peishu , Lin, Qingping et al. Sintering Characteristics and Microwave Dielectric Properties of BaTi4O9 Ceramics with CuO-TiO2 Addition [J]. | CRYSTALS , 2023 , 13 (4) . |
| MLA | Guo, Haoxuan et al. "Sintering Characteristics and Microwave Dielectric Properties of BaTi4O9 Ceramics with CuO-TiO2 Addition" . | CRYSTALS 13 . 4 (2023) . |
| APA | Guo, Haoxuan , Zhu, Peishu , Lin, Qingping , Gao, Min , Tang, Deping , Zheng, Xinghua . Sintering Characteristics and Microwave Dielectric Properties of BaTi4O9 Ceramics with CuO-TiO2 Addition . | CRYSTALS , 2023 , 13 (4) . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
High density Ba4Sm2Fe2Nb8O30 (BSFN) multiferroics ceramics with tetragonal tungsten bronze structure had been prepared by microwave sintering (MS) for 30min and conventional sintering (CS) methods for 4 h at 1275 degrees C. Single tungsten bronze phase and equiaxial grains are obtained for the MS BSFN ceramics, while a small amount secondary phase of SmNbO4 is observed in the CS BSFN ceramics with columnar grains. Compared to Ba4Sm2Fe2Nb8O30 ceramics prepared by CS method, enhanced dielectric, ferroelectric and magnetic properties are achieved for the MS BSFN ceramics. The values of electric polarization Pr and coercive electric field Ec are 2.11 mu C/cm2 and 7.14 kV/cm for the MS BSFN ceramics, respectively. Meantime, the magnetic polarization Mr of 0.410emu/g and coercive magnetic field Hc of 2930Oe are also obtained for the MS BSFN ceramics. Based on the density, crystal structure, point defect and grain, the reasons of enhanced dielectric, ferroelectric and magnetic properties are discussed for the MS BSFN ceramics It is indicated that Ba4Sm2Fe2Nb8O30 is an intrinsic room temperature multiferroic materials.
Keyword ：
Dielectric properties Dielectric properties Microstructure Microstructure Microwave sintering Microwave sintering Multiferroic Multiferroic Tungsten bronze Tungsten bronze
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Huang, X. , Liu, Y. T. , Luo, G. S. et al. Enhanced dielectric, ferroelectric and magnetic properties of Ba4Sm2Fe2Nb8O30 RT multiferroics prepared by microwave sintering [J]. | CERAMICS INTERNATIONAL , 2021 , 47 (15) : 21024-21028 . |
| MLA | Huang, X. et al. "Enhanced dielectric, ferroelectric and magnetic properties of Ba4Sm2Fe2Nb8O30 RT multiferroics prepared by microwave sintering" . | CERAMICS INTERNATIONAL 47 . 15 (2021) : 21024-21028 . |
| APA | Huang, X. , Liu, Y. T. , Luo, G. S. , Lin, C. , Wu, X. , Zheng, X. H. et al. Enhanced dielectric, ferroelectric and magnetic properties of Ba4Sm2Fe2Nb8O30 RT multiferroics prepared by microwave sintering . | CERAMICS INTERNATIONAL , 2021 , 47 (15) , 21024-21028 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
CuO powder with microspheres, submicron sheets had been synthesized only from CuSO4 and Na2CO3 aqueous solutions by a facile route. Significant effects of initial droplet size of CuSO4 aqueous solution were observed on particle size, morphology and gas sensitivity of CuO. The morphologies of CuO powder varied from microspheres to submicron sheets with the introduction method of CuSO4 to Na2CO3 aqueous solutions. Based on the characterized structure and morphology, a possible formation mechanism of CuO had been proposed. High gas sensitivity to ethanol was obtained for the CuO microspheres synthesized by spray method, which exhibited the response sensitivity of 3.25 to ethanol with the concentration of 300 ppm at 250 degrees C. It suggests that the facile route is promising to the batch synthesis of CuO powder with good gas sensing properties.
Keyword ：
CuO microspheres CuO microspheres gas sensor gas sensor spray spray
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Huang Xu , Jing Wei-Dong , Tang De-Ping et al. Facile Synthesis, Morphologies and Gas Sensing Properties of CuO Powder [J]. | CHINESE JOURNAL OF STRUCTURAL CHEMISTRY , 2019 , 38 (11) : 1922-1927 . |
| MLA | Huang Xu et al. "Facile Synthesis, Morphologies and Gas Sensing Properties of CuO Powder" . | CHINESE JOURNAL OF STRUCTURAL CHEMISTRY 38 . 11 (2019) : 1922-1927 . |
| APA | Huang Xu , Jing Wei-Dong , Tang De-Ping , Yu Han , Wu Xiao , Zheng Xing-Hua . Facile Synthesis, Morphologies and Gas Sensing Properties of CuO Powder . | CHINESE JOURNAL OF STRUCTURAL CHEMISTRY , 2019 , 38 (11) , 1922-1927 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
CuO powder with microspheres, submicron sheets had been synthesized only from CuSO4 and Na2CO3 aqueous solutions by a facile route. Significant effects of initial droplet size of CuSO4 aqueous solution were observed on particle size, morphology and gas sensitivity of CuO. The morphologies of CuO powder varied from microspheres to submicron sheets with the introduction method of CuSO4 to Na2CO3 aqueous solutions. Based on the characterized structure and morphology, a possible formation mechanism of CuO had been proposed. High gas sensitivity to ethanol was obtained for the CuO microspheres synthesized by spray method, which exhibited the response sensitivity of 3.25 to ethanol with the concentration of 300 ppm at 250 °C. It suggests that the facile route is promising to the batch synthesis of CuO powder with good gas sensing properties. © 2019 Fujian Institute of Research of the Structure of Matter. All rights reserved.
Keyword ：
CuO microspheres; Gas sensor; Spray CuO microspheres; Gas sensor; Spray
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Huang, X. , Jing, W.-D. , Tang, D.-P. et al. Facile synthesis, morphologies and G as sensing properties of CuO powder [J]. | Jiegou Huaxue , 2019 , 38 (11) : 1922-1927 . |
| MLA | Huang, X. et al. "Facile synthesis, morphologies and G as sensing properties of CuO powder" . | Jiegou Huaxue 38 . 11 (2019) : 1922-1927 . |
| APA | Huang, X. , Jing, W.-D. , Tang, D.-P. , Yu, H. , Wu, X. , Zheng, X.-H. . Facile synthesis, morphologies and G as sensing properties of CuO powder . | Jiegou Huaxue , 2019 , 38 (11) , 1922-1927 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
CuO hollow microspheres had been batch synthesized by a facile route of precipitating and annealing at 270 A degrees C, which was derived from CuSO4 center dot 5H(2)O, Na2CO3 and CTAB. The morphology and structure of synthesized CuO powder were characterized by XRD, SEM, UV-Vis and BET. The formation mechanism of CuO hollow microspheres had been proposed based on the characterized structure and morphology. Firstly, the tiny Cu-2(OH)(2)CO3 crystal strips are formed from CuSO4 and Na2CO3 aqueous solutions. Secondly, the tiny Cu-2(OH)(2)CO3 crystal strips are assembled perpendicularly to the spherical CTA(+) micelles surface due to the template of CTAB. Finally, the CuO hollow microspheres have been obtained due to the decomposition of Cu-2(OH)(2)CO3 and burning of CTAB after annealing at 270 A degrees C. High gas sensitivity to ethanol was achieved for the CuO hollow microspheres. The response of CuO hollow microspheres sensor is 5.6 to ethanol with the concentration of 400 ppm at 250 A degrees C, and the responses/recover time is 17.0/11.9 s. Therefore, it indicates that the facile and batch route is a promising method to synthesize CuO hollow microspheres with excellent gas sensing properties.
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Huang, X. , Ren, Z. B. , Zheng, X. H. et al. A facile route to batch synthesis CuO hollow microspheres with excellent gas sensing properties [J]. | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS , 2018 , 29 (7) : 5969-5974 . |
| MLA | Huang, X. et al. "A facile route to batch synthesis CuO hollow microspheres with excellent gas sensing properties" . | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS 29 . 7 (2018) : 5969-5974 . |
| APA | Huang, X. , Ren, Z. B. , Zheng, X. H. , Tang, D. P. , Wu, X. , Lin, C. . A facile route to batch synthesis CuO hollow microspheres with excellent gas sensing properties . | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS , 2018 , 29 (7) , 5969-5974 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Effect of 35BaO-35ZnO-30B(2)O(3) (BZB) addition on the sintering behaviors, phase evolution and microwave dielectric properties of Ti-modified Ba3Ti5Nb6O28 (Ba3Ti5.1Nb5.9O27.95, BTNO) ceramics had been investigated. BZB addition effectively reduced the sintering temperature of BTNO from 1250 A degrees C to about 900 A degrees C. With increasing BZB addition, the crystal phase of the present ceramics changed from single phase Ba3Ti5Nb6O28 to mixing phases of Ba3Ti5Nb6O28 and Ba3Ti4Nb4O21. And the major phase gradually became from Ba3Ti5Nb6O28 to Ba3Ti4Nb4O21. Dielectric constant and temperature coefficient increased with the rising of BZB addition. But the Qf value gradually declined from 28000 to about 6000 GHz. The BTNO ceramics with 15% BZB addition exhibited excellent microwave dielectric properties as following: epsilon = 46.3, Qf = 5887 GHz and tau(f) = 35.5 ppm/degrees C, which was potential of candidate materials for LTCC application. And the variation of microwave dielectric properties had been also discussed with the phase and microstructure evolution.
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Huang, X. , Wang, W. J. , Lin, J. et al. Sintering behaviors and microwave dielectric properties of Ti-modified Ba3Ti5Nb6O28 ceramics with 35BaO-35ZnO-30B(2)O(3) addition [J]. | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS , 2018 , 29 (2) : 993-998 . |
| MLA | Huang, X. et al. "Sintering behaviors and microwave dielectric properties of Ti-modified Ba3Ti5Nb6O28 ceramics with 35BaO-35ZnO-30B(2)O(3) addition" . | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS 29 . 2 (2018) : 993-998 . |
| APA | Huang, X. , Wang, W. J. , Lin, J. , Tang, D. P. , Wu, X. , Zheng, X. H. . Sintering behaviors and microwave dielectric properties of Ti-modified Ba3Ti5Nb6O28 ceramics with 35BaO-35ZnO-30B(2)O(3) addition . | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS , 2018 , 29 (2) , 993-998 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
重点研究了老挝石的化学成分、形貌特征和矿物组成,并与寿山石进行了比较.研究结果表明,老挝石样品的相对密度为2.52～2.65,主要化学成分为SiO2和Al2O3,与高岭石族矿物的标准值相近;在显微镜下,老挝石样品中地开石的颗粒较粗,高岭石颗粒较小,在扫描电子显徽镜下,地开石晶粒结晶完好,呈假六方片状,粒径较大,高岭石呈片状,结晶程度较好,粒径较小,珍珠陶石颗粒细,结晶程度较低.通过统计,老挝石样品的主要矿物组成为高岭石族矿物,包括地开石、高岭石和珍珠陶石,没有叶蜡石和伊利石.老挝石样品中含有高岭石矿物的占2/3以上,高山石类寿山石中含有地开石的占2/3以上,寿山田黄石中未见高岭石,而“老挝田黄”样品均含高岭石.
Keyword ：
地开石 地开石 寿山石 寿山石 老挝石 老挝石 高岭石 高岭石
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 汤德平 , 郑丹威 , 郑宗坦 et al. 老挝石与寿山石的比较 [J]. | 宝石和宝石学杂志 , 2017 , 19 (5) : 1-13 . |
| MLA | 汤德平 et al. "老挝石与寿山石的比较" . | 宝石和宝石学杂志 19 . 5 (2017) : 1-13 . |
| APA | 汤德平 , 郑丹威 , 郑宗坦 , 黄珊珊 . 老挝石与寿山石的比较 . | 宝石和宝石学杂志 , 2017 , 19 (5) , 1-13 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Structure and dielectric properties have been investigated for CaCu3Ti4O12 (CCTO) ceramics prepared by rapid sintering with relatively high sintering temperature and very short holding time. A very small amount of CuO is observed in XRD patterns of CCTO ceramics. Surface SEM of CCTO ceramics exhibits large grain and intergranular phase. Complex impedance spectra indicate that the internal barrier layer capacitor (IBLC) microstructure has been formed in the CCTO ceramics. And a giant dielectric permittivity of 8.5 x 10(3) at 1 kHz is achieved for the CCTO ceramics sintered at 1130 A degrees C for 30 min. The rapid sintering method may be effective in applying these ceramics, which are expected to facilitate IBLC microstructure.
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Wang, J. Q. , Huang, X. , Zheng, X. H. et al. Structure and electric properties of CaCu3Ti4O12 ceramics prepared by rapid sintering [J]. | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS , 2016 , 27 (2) : 1345-1349 . |
| MLA | Wang, J. Q. et al. "Structure and electric properties of CaCu3Ti4O12 ceramics prepared by rapid sintering" . | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS 27 . 2 (2016) : 1345-1349 . |
| APA | Wang, J. Q. , Huang, X. , Zheng, X. H. , Tang, D. P. . Structure and electric properties of CaCu3Ti4O12 ceramics prepared by rapid sintering . | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS , 2016 , 27 (2) , 1345-1349 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
近一段时间来,大量来自老挝的“老挝石”进入福州寿山石原石市场,给福州的寿山石市场造成较大的冲击.笔者收集了福州市场上部分“老挝石”样品,采用X射线粉末衍射(XRD)、中红外光谱(MIR)和近红外光谱(NIR)等测试方法对“老挝石”样品的外观特征、矿物组成及鉴别方法进行初步研究.研究表明,“老挝石”样品的相对密度为2.52～2.60,微透明—半透明,颜色以白色、红色、粉红色为主,黄色较少,颜色不及寿山石丰富明快.“老挝石”样品的矿物组成包括高岭石、地开石和珍珠陶石,未见叶蜡石和伊利石;含高岭石的“老挝石”样品多为红色或浅红色,透明度较差,类似于寿山石中的善伯石等品种;由有序度较高的地开石组成的“老挝石”样品颜色较浅,透明度较高,与寿山石中的一些坑头石和高山石品种接近;以珍珠陶石为主的“老挝石”样品颜色较浅,多为白色,透明度较好,半透明,而在寿山石中含珍珠陶石的品种很少.“老挝石”的矿物组成与寿山石中的高山石类相似.但是,高山石类寿山石的大多数品种以地开石为主,而“老挝石”样品中含高岭石的占多数.这可能是寿山石与“老挝石”在矿物组成上的重要区别.在鉴别“老挝石”时,应十分注意这一点.近红外光谱分析可以鉴别高岭石,有可能为“老挝石”的鉴别提供一种快速简便的现场无损检测方法.褪色实验表明,在通常条件下,光照不会使“老挝石”产生明显的褪色现象.一些石商反映的褪色现象,或许与“老挝石”表面所含的水分有关.
Keyword ：
地开石 地开石 寿山石 寿山石 “老挝石” “老挝石” 近红外光谱 近红外光谱 高岭石 高岭石
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 汤德平 , 郑丹威 , 黄珊珊 . “老挝石”的矿物组成及鉴别研究 [J]. | 宝石和宝石学杂志 , 2015 , 17 (1) : 1-9 . |
| MLA | 汤德平 et al. "“老挝石”的矿物组成及鉴别研究" . | 宝石和宝石学杂志 17 . 1 (2015) : 1-9 . |
| APA | 汤德平 , 郑丹威 , 黄珊珊 . “老挝石”的矿物组成及鉴别研究 . | 宝石和宝石学杂志 , 2015 , 17 (1) , 1-9 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
本发明公开了一种电容‑压敏双功能CaCu3Ti4O12(CCTO)陶瓷及其制备方法。本发明通过熔盐处理CCTO单相粉体，熔盐为NaCl‑KCl(NaCl/KCl的质量比为49.3 : 50.7)，然后制备获得高介电常数(ε~4000)、高压敏非线性系数(α为20~45)的电容‑压敏双功能CCTO陶瓷。本发明提供的电容‑压敏双功能CCTO陶瓷不含Pb、Bi、Cd等原料，原料来源广泛、价格便宜、环保；制备工艺简单，介电性能和压敏性能优异，该陶瓷材料具有极大的工业应用价值。
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 郑兴华 , 黄旭 , 汤德平 . 一种电容‑压敏双功能陶瓷及其制备方法 : CN201510656539.7[P]. | 2015/10/13 . |
| MLA | 郑兴华 et al. "一种电容‑压敏双功能陶瓷及其制备方法" : CN201510656539.7. | 2015/10/13 . |
| APA | 郑兴华 , 黄旭 , 汤德平 . 一种电容‑压敏双功能陶瓷及其制备方法 : CN201510656539.7. | 2015/10/13 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Export
| Results： |
Selected to |
| Format： |
