泛論工業材料熱傳導特性測試的原理與應用
泛論工業材料熱傳導特性測試的原理與應用
在整個 18 世紀,許多科學家都對熱的本質提出了質疑。艾薩克·牛頓 (Isaac Newton) 認為熱能是透過粒子的震動傳遞的,而勞勃·虎克 (Robert Hooke) 則認為熱能是人體各部位運動而產生的一種特性1。然而,在歷史上第一個眾所周知對熱量進行測量的貢獻者是蘇格蘭醫生和化學家約瑟夫·布拉克 (Joseph Black)1。1761 年,他透過精確的測量發現,對達熔點的冰或達沸點的水施加熱量並不會導致溫度變化1。這個觀察結果使他成為第一個區分溫度和熱量的科學家,標誌了熱力學的開端。
Overview In this Tech Tip, we will show you how to add …
We expect a lot from our composites: rocket materials need to endure the heat of takeoff, wind turbines must withstand high wind gusts, and sneakers are expected to be durable and supportive on long runs. How do experts develop composites tailored to such specific uses and verify their properties?
從輕薄的筆記型電腦到長途電動汽車,無數應用都需要提高鋰電池的能量密度和性能。由於電池電極直接影響電池的能量密度和性能,因此電池研究人員對電極及其組成特別感興趣,希望將技術推向更高境界。電池漿料加工處理也是製程中的關鍵步驟,是提升效率並降低成本的重大機會。
Rheology for Topical and Personal Care Formulations
Over the past decade, battery research, development, and quality control have adopted in-situ and in-operando isothermal microcalorimetry (IMC) as the leading method to evaluate heat flow during lithium-ion battery cycling. While cycling a cell to failure can take many months, emerging diagnostic tests are able to predict long-term behavior in a matter of weeks.
熱塑性材料,包含塑膠﹑纖維和彈性體等型態,是熱分析技術的大宗樣品來源,近來發現流變儀在此的應用也方興未艾,蒸蒸日上。本主題分為上﹑下兩部分介紹,上半部先闡明各種儀器的設計原理與量測方式,下半部則介紹每種儀器的應用實例。
Following the packing and unpacking instructions of your instrument is important to the lifetime and performance of your instrument.
Following the packing and unpacking instructions of your instrument is important to the lifetime and performance of your instrument.
Overview In this Tech Tip, we will demonstrate how to c…