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18714445317銀蟲 (初入文壇)
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[求助]
漢譯英，謝謝
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| DAC作為常見的高壓產(chǎn)生裝置，同樣可以進(jìn)行高壓熱物性測(cè)量。Yagi 等（2011）把激光閃爍法測(cè)定礦物高溫?zé)釘U(kuò)散系數(shù)的辦法引入 DAC，他把直徑 50μm，厚度 3μm 的樣品的前后表面噴涂鉑層，高壓下，前表面被周期 2 ns，波長(zhǎng) 1.06μm 激光脈沖加熱。為了檢測(cè)后表面溫度，一束0.78μm 的連續(xù)波探測(cè)光束照射進(jìn)來，通過連續(xù)波探測(cè)光束的反射強(qiáng)度，可以得到樣品背面的溫度。樣品的熱擴(kuò)散系數(shù)由得到的瞬時(shí)溫度曲線分析獲得。在測(cè)量過程中，樣品由于激光照射引起的溫升不超過10 K，可以較準(zhǔn)確的獲得樣品室溫高壓下的熱擴(kuò)散系數(shù)，目前由該裝置獲得了后鈣鈦礦144GPa壓力下的熱擴(kuò)散系數(shù)，但是由于技術(shù)原因，該方法還未應(yīng)用于高溫情況。 |
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lisaky
金蟲 (小有名氣)
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18714445317: 金幣+50, 翻譯EPI+1, ★★★很有幫助, 謝謝 2015-12-07 17:13:22
18714445317: 金幣+50, 翻譯EPI+1, ★★★很有幫助, 謝謝 2015-12-07 17:13:22
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As a common high pressure producing device, DAC can also carry out high pressure thermal physical property measurement. Yagi(2011) introduced the way of measuring mineral high temperature diffusion coefficient by laser scintillation method toDAC. The sample with 50μm in diameter and 3μm in thickness was sprayed a layer of platinum on the front surface and rear surface. Under high pressure, front surface was heated by laser pulse with 2ns peorid, and 1.06μm wavelength. To detect the rear surface temperature, a beam of 0.78μm continuous wave probe beam was irradiated, and the back temperature of the sample could be calculated through the reflected intensity of the continuous wave probe beam. Thermal diffusion coefficient of the sample was obtained from the analysis of the instantaneous temperature curve. In the process of measurement, thermal diffusion coefficient of the sample under room temperature and high pressure could be accurately obtained because temperature rise was no more than 10k caused by laser irradiation. At present, the device has obtained thermal diffusion coefficient under pressure of Post perovskite’s 144GPa. Howerver, the method has not been applied in high temperature condition due to technical reasons. －－ 僅供參考。 |
2樓2015-12-07 16:47:08
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