Pub Date : 2021-01-01DOI: 10.14062/J.ISSN.0454-5648.20200759
Xiaowei Ouyang, Shida Xu, Yuwei Ma, G. Ye
{"title":"集料化学特性对C-S-H成核和生长的影响","authors":"Xiaowei Ouyang, Shida Xu, Yuwei Ma, G. Ye","doi":"10.14062/J.ISSN.0454-5648.20200759","DOIUrl":"https://doi.org/10.14062/J.ISSN.0454-5648.20200759","url":null,"abstract":"","PeriodicalId":35812,"journal":{"name":"Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66643103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-07-01DOI: 10.14062/J.ISSN.0454-5648.2016.07.22
D. Kong, Luoshen Pan, S. Zhan, Zheng Xiaohua, Yang Fang'er, Surendra P. Shah
Phase change ceramisite (PCC) was prepared by vacuum adsorption method using inorganic CaCl2·6H2O (CCH) as phase change material. Effects of loading in ceramsite on super–cooling of CCH during liquid–solid phase change process and surface–sealing treatment of PCC on properties of the cement–based composite phase change material were investigated. The results showed that the amount of CCH adsorbed in ceramsite was significantly higher compared to that of capric acid (CA), and the supercooling degree of CCH during liquid–solid phase change can be greatly reduced after being loaded in ceramisite. By simple clading with cement and PEG, the salt hydrate cannot be effectively sealed within ceramisite. The dewdrops appeared on the surface after exposed in the air for 3 d for claded with cement, and expansive cream–like substance was found on the surface after exposed in the air for one month for claded with PEG, leading to a destruction of PCC. After further loaded with capric acid or oily paint, incorporation of both PCC in cement–based materials can effectively lower the temperature rise during hydration. However, the hardened composite showed leakage of CA for the former case whereas no leakage appeared for the ceramisite coated by using oily paint.
{"title":"Preparation and properties of phase change ceramisite loaded with inorganic salt hydrate","authors":"D. Kong, Luoshen Pan, S. Zhan, Zheng Xiaohua, Yang Fang'er, Surendra P. Shah","doi":"10.14062/J.ISSN.0454-5648.2016.07.22","DOIUrl":"https://doi.org/10.14062/J.ISSN.0454-5648.2016.07.22","url":null,"abstract":"Phase change ceramisite (PCC) was prepared by vacuum adsorption method using inorganic CaCl2·6H2O (CCH) as phase change material. Effects of loading in ceramsite on super–cooling of CCH during liquid–solid phase change process and surface–sealing treatment of PCC on properties of the cement–based composite phase change material were investigated. The results showed that the amount of CCH adsorbed in ceramsite was significantly higher compared to that of capric acid (CA), and the supercooling degree of CCH during liquid–solid phase change can be greatly reduced after being loaded in ceramisite. By simple clading with cement and PEG, the salt hydrate cannot be effectively sealed within ceramisite. The dewdrops appeared on the surface after exposed in the air for 3 d for claded with cement, and expansive cream–like substance was found on the surface after exposed in the air for one month for claded with PEG, leading to a destruction of PCC. After further loaded with capric acid or oily paint, incorporation of both PCC in cement–based materials can effectively lower the temperature rise during hydration. However, the hardened composite showed leakage of CA for the former case whereas no leakage appeared for the ceramisite coated by using oily paint.","PeriodicalId":35812,"journal":{"name":"Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66643054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-05-01DOI: 10.14062/J.ISSN.0454-5648.2015.05.09
Jianhui Lin, Jiangtao Yu, V. Li
{"title":"Performance of Engineered Cementitious Composites After Treated at Sub-high Temperatures","authors":"Jianhui Lin, Jiangtao Yu, V. Li","doi":"10.14062/J.ISSN.0454-5648.2015.05.09","DOIUrl":"https://doi.org/10.14062/J.ISSN.0454-5648.2015.05.09","url":null,"abstract":"","PeriodicalId":35812,"journal":{"name":"Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66643000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-01-01DOI: 10.7521/J.ISSN.0454-5648.2015.03.15
Chen Junhong, M. Yan, Jin-dong Su, Bin Li, Yong Li, Zhihui Li, Jia-lin Sun, L. Dongfang
Sample was prepared using Fe2O3, Al2O3 and Si O2 powders as raw materials according to mass ratio Fe O:Al2O3 of 40.8:59.2 and adding a percent of Si O2 in the synthetic system, and being sintered under high purity nitrogen atmosphere at 1 600 ℃for 4 h. The sample was analyzed and characterized by X-ray diffraction, scanning electron microscope, energy dispersive spectroscopy and transmission electron microscope. Based on Fe O-Al2O3-Si O2 ternary phase diagram, the existence of silicon dioxide was investigated. The results indicate that silicon dioxide didn't enter into hercynite crystals, but existed among hercynite crystals as amorphous phase. When a percent of Si O2 was added into the synthetic system, amorphous phase containing Si O2 was discontinuously distributed and the direct contact among hercynite crystals wasn't changed.
{"title":"Occurrence State of SiO_2 in Hercynite Synthesized by Reaction Sintering","authors":"Chen Junhong, M. Yan, Jin-dong Su, Bin Li, Yong Li, Zhihui Li, Jia-lin Sun, L. Dongfang","doi":"10.7521/J.ISSN.0454-5648.2015.03.15","DOIUrl":"https://doi.org/10.7521/J.ISSN.0454-5648.2015.03.15","url":null,"abstract":"Sample was prepared using Fe2O3, Al2O3 and Si O2 powders as raw materials according to mass ratio Fe O:Al2O3 of 40.8:59.2 and adding a percent of Si O2 in the synthetic system, and being sintered under high purity nitrogen atmosphere at 1 600 ℃for 4 h. The sample was analyzed and characterized by X-ray diffraction, scanning electron microscope, energy dispersive spectroscopy and transmission electron microscope. Based on Fe O-Al2O3-Si O2 ternary phase diagram, the existence of silicon dioxide was investigated. The results indicate that silicon dioxide didn't enter into hercynite crystals, but existed among hercynite crystals as amorphous phase. When a percent of Si O2 was added into the synthetic system, amorphous phase containing Si O2 was discontinuously distributed and the direct contact among hercynite crystals wasn't changed.","PeriodicalId":35812,"journal":{"name":"Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71135906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-01-01DOI: 10.14062/J.ISSN.0454-5648.2015.10.11
L. Tang, P. Utgenannt, Dimitrios Boubitsas
This paper presents some durability and service life models for reinforced concrete structures with regard to chloride ingress, carbonation and frost attack. In the past years a number of models for durability design of concrete structures have been suggested by relevant organisations or international committees. It is necessary to validate these models against long-term field data for their applicability with respect to exposure climate in order to satisfactorily use the models in the durability design and redesign of concrete structures. In this study, various potential models for concrete resistance to chloride ingress, carbonation and frost attack were briefly reviewed. Three models including the simple ERFC, the DuraCrete and the ClinConc, for prediction of chloride ingress were evaluated using the infield data collected from both the field exposure site after over 20 years exposure and the real road bridges of about 30 years old. A physicochemical model for prediction of carbonation depth was evaluated using the infield data collected from the field exposure site after 11 years exposure and the limited data from the real structures with the age of 7-13 years. For the modelling of frost attack, some problems in measurement of critical saturation degree and actual degree of saturation are discussed. According to the comparison results, the simple ERFC overestimates whilst the DuraCrete model underestimate the chloride ingress in most cases. The ClinConc model on the other hand gives reasonable good prediction for both the short-term (one year) and the long-term (21 years) exposure. The Papadakis model for carbonation also gives fairly good prediction of carbonation depth when compared with the Norwegian infield data classified as exposure class XC3, but underestimates the carbonation depths when compared with the infield data from Norwegian structures in exposure class XC4. For the frost attack, it is premature to apply the models to the service life prediction so far.
{"title":"Durability and service life prediction of reinforced concrete structures","authors":"L. Tang, P. Utgenannt, Dimitrios Boubitsas","doi":"10.14062/J.ISSN.0454-5648.2015.10.11","DOIUrl":"https://doi.org/10.14062/J.ISSN.0454-5648.2015.10.11","url":null,"abstract":"This paper presents some durability and service life models for reinforced concrete structures with regard to chloride ingress, carbonation and frost attack. In the past years a number of models for durability design of concrete structures have been suggested by relevant organisations or international committees. It is necessary to validate these models against long-term field data for their applicability with respect to exposure climate in order to satisfactorily use the models in the durability design and redesign of concrete structures. In this study, various potential models for concrete resistance to chloride ingress, carbonation and frost attack were briefly reviewed. Three models including the simple ERFC, the DuraCrete and the ClinConc, for prediction of chloride ingress were evaluated using the infield data collected from both the field exposure site after over 20 years exposure and the real road bridges of about 30 years old. A physicochemical model for prediction of carbonation depth was evaluated using the infield data collected from the field exposure site after 11 years exposure and the limited data from the real structures with the age of 7-13 years. For the modelling of frost attack, some problems in measurement of critical saturation degree and actual degree of saturation are discussed. According to the comparison results, the simple ERFC overestimates whilst the DuraCrete model underestimate the chloride ingress in most cases. The ClinConc model on the other hand gives reasonable good prediction for both the short-term (one year) and the long-term (21 years) exposure. The Papadakis model for carbonation also gives fairly good prediction of carbonation depth when compared with the Norwegian infield data classified as exposure class XC3, but underestimates the carbonation depths when compared with the infield data from Norwegian structures in exposure class XC4. For the frost attack, it is premature to apply the models to the service life prediction so far.","PeriodicalId":35812,"journal":{"name":"Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66643010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-01-01DOI: 10.14062/J.ISSN.0454-5648.2015.10.12
E. Holt, M. Ferreira, H. Kuosa, M. Leivo
{"title":"Performance and durability of concrete under effect of multi-deterioration mechanisms","authors":"E. Holt, M. Ferreira, H. Kuosa, M. Leivo","doi":"10.14062/J.ISSN.0454-5648.2015.10.12","DOIUrl":"https://doi.org/10.14062/J.ISSN.0454-5648.2015.10.12","url":null,"abstract":"","PeriodicalId":35812,"journal":{"name":"Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66643044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-03-01DOI: 10.1002/9781118771402.CH1
Long Li, Haosu Luo, Xiangyong Zhao, Xiaobing Li, Bo Ren, Qing Xu, Wenning Di
Relaxor-based ferroelectric single crystals(i.e.,lead magnesium niobate-lead titanate(PMNT),Mn-doped PMNT, ternary lead indium niobate-lead magnesium niobate-lead titanate(PMNT)and Mn-doped PIMNT)exhibit a high piezoelectric performance and superior pyroelectric properties.The pyroelectric coefficients of 15.3×10-4C/m2 K and 17.2×10-4C/m2 K were obtained for PMN-0.26PT and Mn-doped PMN-0.26PT,respectively.The dielectric loss of binary and ternary relaxor-based single crystals decreases from 0.3%to 0.05%due to Mn ions doping,enhancing the detectivity figure of merit(Fd)from 15.3×10-5Pa-1/2to 40.2× 10-5 Pa-1/2 for Mn-doped PMN-0.26PT.The Fdof Mn-PIMNT(23/47/30)is 19.5×10-5Pa-1/2.Furthermore,the Curie temperature is 253℃for PIMNT(41/17/42)and 179℃for Mn-doped PIMNT(23/47/30),respectively.By using the Mn-doped PMNT single crystals as sensitive element and multi-walled carbon nanotubes as absorbing layer,we can obtain the superior infrared detector.The specific detectivity of Mn-doped PMNT-based detector is 3.0×109 cm·Hz1/2/W at 4Hz and 2.21×109 cm·Hz1/2/W at 10Hz,respectively,which are four times greater than that of LiTaO3-based detector.
{"title":"Pyroelectric Performances of Relaxor‐Based Ferroelectric Single Crystals and their Applications in Infrared Detectors","authors":"Long Li, Haosu Luo, Xiangyong Zhao, Xiaobing Li, Bo Ren, Qing Xu, Wenning Di","doi":"10.1002/9781118771402.CH1","DOIUrl":"https://doi.org/10.1002/9781118771402.CH1","url":null,"abstract":"Relaxor-based ferroelectric single crystals(i.e.,lead magnesium niobate-lead titanate(PMNT),Mn-doped PMNT, ternary lead indium niobate-lead magnesium niobate-lead titanate(PMNT)and Mn-doped PIMNT)exhibit a high piezoelectric performance and superior pyroelectric properties.The pyroelectric coefficients of 15.3×10-4C/m2 K and 17.2×10-4C/m2 K were obtained for PMN-0.26PT and Mn-doped PMN-0.26PT,respectively.The dielectric loss of binary and ternary relaxor-based single crystals decreases from 0.3%to 0.05%due to Mn ions doping,enhancing the detectivity figure of merit(Fd)from 15.3×10-5Pa-1/2to 40.2× 10-5 Pa-1/2 for Mn-doped PMN-0.26PT.The Fdof Mn-PIMNT(23/47/30)is 19.5×10-5Pa-1/2.Furthermore,the Curie temperature is 253℃for PIMNT(41/17/42)and 179℃for Mn-doped PIMNT(23/47/30),respectively.By using the Mn-doped PMNT single crystals as sensitive element and multi-walled carbon nanotubes as absorbing layer,we can obtain the superior infrared detector.The specific detectivity of Mn-doped PMNT-based detector is 3.0×109 cm·Hz1/2/W at 4Hz and 2.21×109 cm·Hz1/2/W at 10Hz,respectively,which are four times greater than that of LiTaO3-based detector.","PeriodicalId":35812,"journal":{"name":"Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/9781118771402.CH1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50725520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-06-01DOI: 10.7521/J.ISSN.0454-5648.2013.06.13
Xiao Fan, Su Liangbi, Jun Xu, X. Jiang
{"title":"Bi 和 Nd 共掺 CsI 晶体近红外宽带发光性能","authors":"Xiao Fan, Su Liangbi, Jun Xu, X. Jiang","doi":"10.7521/J.ISSN.0454-5648.2013.06.13","DOIUrl":"https://doi.org/10.7521/J.ISSN.0454-5648.2013.06.13","url":null,"abstract":"","PeriodicalId":35812,"journal":{"name":"Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71135873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-01-01DOI: 10.7521/J.ISSN.0454-5648.2013.11.06
Xu Linglin, W. Peiming, Zhang Guofang, G. Schutter
The influence mechanism of calcium sulfate varieties on the strength of Portland cement-calcium aluminate cement blends were investigated by means of calorimetry, X-ray diffraction, environmental scanning electron microscopy. Results show that the variety of calcium sulfate determines its solubility and dissolution rate, which directly lead to the differences in the formation content,time and size of ettringite(AFt), and affects the volume stability, which finally determines the strength of pastes. When the calcium sulfate dosage is 7.5%, the formation content of AFt firstly increases and then decreases. However, the time when AFt content reaches the maximum and the size of AFt have close relationships with the variety of calcium sulfate. When anhydrite is added, the transit time from AFt to monosulfate is the latest, and the size of AFt is much longer and thinner than those with other calcium sulfate, additionally the AFt content before 8 hours is prominently lower than others, which leads to lower strength. When the calcium sulfate dosage is 15%, secondary gypsum also forms besides AFt, is ten times bigger than AFt. This can lead to the expansion and even complete lost of strength for the systems with hemi-hydrite.
{"title":"Influence Mechanism of Calcium Sulfate Variety on Strength of Portland Cement-calcium Aluminate Cement Blends","authors":"Xu Linglin, W. Peiming, Zhang Guofang, G. Schutter","doi":"10.7521/J.ISSN.0454-5648.2013.11.06","DOIUrl":"https://doi.org/10.7521/J.ISSN.0454-5648.2013.11.06","url":null,"abstract":"The influence mechanism of calcium sulfate varieties on the strength of Portland cement-calcium aluminate cement blends were investigated by means of calorimetry, X-ray diffraction, environmental scanning electron microscopy. Results show that the variety of calcium sulfate determines its solubility and dissolution rate, which directly lead to the differences in the formation content,time and size of ettringite(AFt), and affects the volume stability, which finally determines the strength of pastes. When the calcium sulfate dosage is 7.5%, the formation content of AFt firstly increases and then decreases. However, the time when AFt content reaches the maximum and the size of AFt have close relationships with the variety of calcium sulfate. When anhydrite is added, the transit time from AFt to monosulfate is the latest, and the size of AFt is much longer and thinner than those with other calcium sulfate, additionally the AFt content before 8 hours is prominently lower than others, which leads to lower strength. When the calcium sulfate dosage is 15%, secondary gypsum also forms besides AFt, is ten times bigger than AFt. This can lead to the expansion and even complete lost of strength for the systems with hemi-hydrite.","PeriodicalId":35812,"journal":{"name":"Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71135787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ding Jun, Yang Qiu-hong, Tang Zai-feng, Xu Jun, Su Liang-Bi
Nd 3+ -doped Y 2-2 x La 2 x O 3 ( x =0.08) transparent ceramics were fabricated by conventional fabrication process. Spectroscopic properties of the samples were investigated. The absorption band of Nd 3+ : Y 1.84 La 0.16 O 3 was broad covering the wavelength range 780—850 nm. When doped with 1.5at% Nd 3+ , the cross sections of the sample at 820 nm and laser diode pumped 808 nm were 1.81×10 -20 cm 2 and 1.54×10 -20 cm 2 , respectively. The strongest emission peak of the sample was centered at 1078 nm with long fluorescent lifetime, broad emission bandwidth and high quantum efficiency. Because of the additive La 2 O 3 , the spectroscopic quality parameter ( X Nd ) of matrix was decreased from 1.6 to 0.46, thus the fluorescence branch ratio of 4 F 3/2 — 4 I 11/2 transition was increased to 56.82%. These properties of Nd 3+ : Y 1.84 La 0.16 O 3 transparent ceramic are benefitial to achieve high efficient laser output and ultrashort modelocked pulse.
{"title":"Spectroscopic characteristics of Nd 3+ -doped yttrium lanthanum oxide trans parent ceramics","authors":"Ding Jun, Yang Qiu-hong, Tang Zai-feng, Xu Jun, Su Liang-Bi","doi":"10.7498/aps.55.6414","DOIUrl":"https://doi.org/10.7498/aps.55.6414","url":null,"abstract":"Nd 3+ -doped Y 2-2 x La 2 x O 3 ( x =0.08) transparent ceramics were fabricated by conventional fabrication process. Spectroscopic properties of the samples were investigated. The absorption band of Nd 3+ : Y 1.84 La 0.16 O 3 was broad covering the wavelength range 780—850 nm. When doped with 1.5at% Nd 3+ , the cross sections of the sample at 820 nm and laser diode pumped 808 nm were 1.81×10 -20 cm 2 and 1.54×10 -20 cm 2 , respectively. The strongest emission peak of the sample was centered at 1078 nm with long fluorescent lifetime, broad emission bandwidth and high quantum efficiency. Because of the additive La 2 O 3 , the spectroscopic quality parameter ( X Nd ) of matrix was decreased from 1.6 to 0.46, thus the fluorescence branch ratio of 4 F 3/2 — 4 I 11/2 transition was increased to 56.82%. These properties of Nd 3+ : Y 1.84 La 0.16 O 3 transparent ceramic are benefitial to achieve high efficient laser output and ultrashort modelocked pulse.","PeriodicalId":35812,"journal":{"name":"Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71343374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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