高温高压合成金刚石用叶蜡石腔体热导率研究
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摘要
针对高温高压下叶蜡石热导率实时测试存在的问题,采用PPMS综合物性测量系统和LFA427激光热导仪,分别测试了金刚石合成前后合成块不同区域叶蜡石的热导率。测试结果表明,金刚石合成前粉压叶蜡石热导率为6.45 W/(m·K),合成后叶蜡石热导率为2.77 W(m·K),合成后叶蜡石块中间层热导率最大、内层次之、外层最小。通过XRD衍射分析结果发现,经高温高压作用后的叶蜡石晶面间距不但没有被压缩反而发生膨胀,叶蜡石合成块不同区域晶格膨胀率与其相应的热导率有明显的相关性。根据固态声子热导理论模型,解释了高温高压作用前后叶蜡石热导率不同的原因,并推算出在金刚石合成温度压力条件下叶蜡石块的平均热导率为10.13 W/(m·K)。
For the in situ testing problems of thermal conductivity of pyrophyllite at HT/HP,in the paper the thermal conductivity of compressed pyrophyllite block before and after diamond synthesis at HT/HP were tested by using the comprehensive property measurement system PPMS and laser conductometer LFA427. The results showed that the thermal conductivity of compressed pyrophyllite before diamond synthesis was about 6. 45 W/( m · K),which was 2. 77 W/( m · k) after diamond synthesis at HT/HP. It was found that the thermal conductivity in the intermediate layer of pyrophyllite block was the largest,followed by the inner,and the outer layer of pyrophyllite block was the minimum. XRD analysis results showed that the crystal plane distance of pyrophyllite block was expanded instead of compressed after HT/HP process with the biggest expansion ratio at the intermediate layer,then the inner layer and the minimum in the outer layer of the block. Therefore it seem that the decrease of the thermal conductivity was obviously related with interplanar spacing expansion of pyrophyllite after HT/HP process. According to the theoretical thermal conductivity model of the spring oscillator,the decrease of the thermal conductivity of the pyrophyllite block after HT/HP process was explained,and the thermal conductivity of compressed pyrophyllite block under HT/HP of diamond synthesis was deduced to be about 10. 13 W/( m·K).
For the in situ testing problems of thermal conductivity of pyrophyllite at HT/HP,in the paper the thermal conductivity of compressed pyrophyllite block before and after diamond synthesis at HT/HP were tested by using the comprehensive property measurement system PPMS and laser conductometer LFA427. The results showed that the thermal conductivity of compressed pyrophyllite before diamond synthesis was about 6. 45 W/( m · K),which was 2. 77 W/( m · k) after diamond synthesis at HT/HP. It was found that the thermal conductivity in the intermediate layer of pyrophyllite block was the largest,followed by the inner,and the outer layer of pyrophyllite block was the minimum. XRD analysis results showed that the crystal plane distance of pyrophyllite block was expanded instead of compressed after HT/HP process with the biggest expansion ratio at the intermediate layer,then the inner layer and the minimum in the outer layer of the block. Therefore it seem that the decrease of the thermal conductivity was obviously related with interplanar spacing expansion of pyrophyllite after HT/HP process. According to the theoretical thermal conductivity model of the spring oscillator,the decrease of the thermal conductivity of the pyrophyllite block after HT/HP process was explained,and the thermal conductivity of compressed pyrophyllite block under HT/HP of diamond synthesis was deduced to be about 10. 13 W/( m·K).
引文
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[7]王松顺.叶蜡石性质对金刚石合成技术的影响[J].珠宝科技,2003,15(3):19-22.Wang Songshun.Effect of diamond sintering technology on pyrophyllite[J].China Jewelry,2003,15(3):19-22.
[8]汪洋,万隆,刘小盘,等.叶蜡石性能对合成金刚石的影响[J].超硬材料工程,2005,3(3):21-24.Wang Yang,Wan Long,Liu Xiaopan,et al.Effect of diamond sintering on pyrophyllite[J].Superhard Material Engineering,2005,3(3):21-24.
[9]宋城,华丽.传压介质在人造金刚石合成中的性能研究[J].金刚石与磨料磨具工程,2005,148(4):55-58.Song Cheng,Hua Li.Properties of pressure transmission medium on diamond sintering[J].Diamond Abrasives and Engineering,2005,148(4):55-58.
[10]车朝红,赵义文.传压介质的性能与金刚石的合成[J].地质装备,2000,1(2):30-33.Che Chaohong,Zhao Yiwen.Properties of pressure transmission medium and diamond sintering[J].Equipment for Geotechnical Engineering,2000,1(2):30-33.
[11]Ter H J H,Renner J.In situ impedance spectroscopy on pyrophyllite and Ca CO3at high pressure and temperature:phase transformations and kinetics of atomistic transport[J].Physics and Chemistry of Minerals,2007,1(34):445-465.
[12]Hicks T L,Secco R.Dehydration and decomposition of pyrophyllite at high pressures:electrical conductivity and Xray diffraction studies to 5 GPa[J].Canadian Journal of Earth Sciences,1997,1(34):875-882.
[13]Chen Wei,Decker D L.Pressure dependence of the thermal conductivity of pyrophyllite to 40 kbar[J].Appllied Physics,1992,71(6):2624-2627.
[14]Bridgman P W.The thermal conductivity and compressibility of several rocks under high pressures[J].American Journal of Science,1924,38(7):81-102.
[15]何寿安,李家璘,成向荣,等.静态超高压高温技术的若干问题[J].物理学报,1977,26(2):100-114.He Shouan,Li Jiaolin,Cheng Xiangrong,et al.Issues on static ultra-high pressure and high temperature technology[J].Acta Physica Sinica,1977,26(2):100-114.
[16]王光祖.超硬材料[M].郑州:河南科技出版社,1996:56-60.
[17]陶增六.超高压下叶蜡石的某些性质[J].硅酸盐通报,1983,1(6):39-43.Tao Zengliu.The ultra-pressure properties of pyrophyllite[J].Bulletin of the Chinese Ceramic Society,1983,1(6):39-43.
[18]Carte A E.Thermal constants of pyrophyllite and their change on heating[J].British Journal of Applied Physics,1955,6(9):326-328.
[19]Lee J.Load discontinuity method for pressure calibration:the tetrahedral anvil apparatus below 25 kilobars[J].Nature,1964,203(4948):965-968.
[20]Lee D,Mazaki H.Some properties of pyrophyllite as pressure medium[J].Bull.Inst.Chem.Res.,1973,51(4):189-184.
[21]陈启武,熊湘军,邓福铭.超高压技术研究[J].矿冶工程,2001,21(1):61-65.Chen Qiwu,Xiong Xiangjun,Deng Fuming.Study on ultra-pressure technology[J].Mining and Metallurgical Engineering,2001,21(1):61-65.
[22]邓福铭,陈为芳,赵君.叶蜡石高压同步辐射X射线衍射分析[C]//第十六届中国高压科学学术会议论文集.宜昌:中国物理学会高压物理专业委员会,2012.
[2]许凤林,徐传云.浙江省叶蜡石开发利用发展方向[J].中国非金属矿工业导刊,2007,1(5):15-17.Xu Fenglin,Xu Chuanyun.Development direction of pyrophyllite utilization in Zhejiang province[J].China Non-metallic Minerals Industry,2007,1(5):15-17.
[3]张巍.我国叶蜡石的应用进展[J].矿物岩石,2016,36(3):15-28.Zhang Wei.Progress on utilization of pyrophyllite[J].Journal of Mineralogy and Petrology,2016,36(3):15-28.
[4]陶知耻.传压介质——叶蜡石及其在超高压高温下的密封机理[J].超硬材料与工程,1995,1(2):5-11.Tao Zhichi.Pressure transmission medium-mechanism of pyrophyllite and its sealing edge under ultra-high pressure and high temperature[J].Superhard Material Engineering,1995,1(2):5-11.
[5]杨炳飞,岳铁兵.我国传压、密封介质研究现状及进展[J].超硬材料工程,2005,1(3):43-45.Yang Bingfei,Yue Tiebing.Status and future of sealing and pressure transmission media.[J].Superhard Material Engineering,2005,1(3):43-45.
[6]杨炳飞,冯安生,岳铁兵,等.叶蜡石在高压合成中作为密封传压介质的应用研究[J].矿产综合利用,2006,1(1):35-39.Yang Bingfei,Feng Ansheng,Yue Tiebing,et al.Application of sealing and pressure transmission media of pyrophyllite at high pressure[J].Multipurpose Utilization of Mineral Resources,2006,1(1):35-39.
[7]王松顺.叶蜡石性质对金刚石合成技术的影响[J].珠宝科技,2003,15(3):19-22.Wang Songshun.Effect of diamond sintering technology on pyrophyllite[J].China Jewelry,2003,15(3):19-22.
[8]汪洋,万隆,刘小盘,等.叶蜡石性能对合成金刚石的影响[J].超硬材料工程,2005,3(3):21-24.Wang Yang,Wan Long,Liu Xiaopan,et al.Effect of diamond sintering on pyrophyllite[J].Superhard Material Engineering,2005,3(3):21-24.
[9]宋城,华丽.传压介质在人造金刚石合成中的性能研究[J].金刚石与磨料磨具工程,2005,148(4):55-58.Song Cheng,Hua Li.Properties of pressure transmission medium on diamond sintering[J].Diamond Abrasives and Engineering,2005,148(4):55-58.
[10]车朝红,赵义文.传压介质的性能与金刚石的合成[J].地质装备,2000,1(2):30-33.Che Chaohong,Zhao Yiwen.Properties of pressure transmission medium and diamond sintering[J].Equipment for Geotechnical Engineering,2000,1(2):30-33.
[11]Ter H J H,Renner J.In situ impedance spectroscopy on pyrophyllite and Ca CO3at high pressure and temperature:phase transformations and kinetics of atomistic transport[J].Physics and Chemistry of Minerals,2007,1(34):445-465.
[12]Hicks T L,Secco R.Dehydration and decomposition of pyrophyllite at high pressures:electrical conductivity and Xray diffraction studies to 5 GPa[J].Canadian Journal of Earth Sciences,1997,1(34):875-882.
[13]Chen Wei,Decker D L.Pressure dependence of the thermal conductivity of pyrophyllite to 40 kbar[J].Appllied Physics,1992,71(6):2624-2627.
[14]Bridgman P W.The thermal conductivity and compressibility of several rocks under high pressures[J].American Journal of Science,1924,38(7):81-102.
[15]何寿安,李家璘,成向荣,等.静态超高压高温技术的若干问题[J].物理学报,1977,26(2):100-114.He Shouan,Li Jiaolin,Cheng Xiangrong,et al.Issues on static ultra-high pressure and high temperature technology[J].Acta Physica Sinica,1977,26(2):100-114.
[16]王光祖.超硬材料[M].郑州:河南科技出版社,1996:56-60.
[17]陶增六.超高压下叶蜡石的某些性质[J].硅酸盐通报,1983,1(6):39-43.Tao Zengliu.The ultra-pressure properties of pyrophyllite[J].Bulletin of the Chinese Ceramic Society,1983,1(6):39-43.
[18]Carte A E.Thermal constants of pyrophyllite and their change on heating[J].British Journal of Applied Physics,1955,6(9):326-328.
[19]Lee J.Load discontinuity method for pressure calibration:the tetrahedral anvil apparatus below 25 kilobars[J].Nature,1964,203(4948):965-968.
[20]Lee D,Mazaki H.Some properties of pyrophyllite as pressure medium[J].Bull.Inst.Chem.Res.,1973,51(4):189-184.
[21]陈启武,熊湘军,邓福铭.超高压技术研究[J].矿冶工程,2001,21(1):61-65.Chen Qiwu,Xiong Xiangjun,Deng Fuming.Study on ultra-pressure technology[J].Mining and Metallurgical Engineering,2001,21(1):61-65.
[22]邓福铭,陈为芳,赵君.叶蜡石高压同步辐射X射线衍射分析[C]//第十六届中国高压科学学术会议论文集.宜昌:中国物理学会高压物理专业委员会,2012.