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一、定義

瞬態(tài)平面熱源技術(TPS)是用于測量導熱系數(shù)的一種新型的方法，由瑞典Chalmer理工大學的Silas Gustafsson教授在熱線法的基礎上發(fā)展起來的。它測定材料熱物性的原理是基于無限大介質中階躍加熱的圓盤形熱源產生的瞬態(tài)溫度響應。利用熱阻性材料做成一個平面的探頭，同時作為熱源和溫度傳感器。合金的熱阻系數(shù)一溫度和電阻的關系呈線性關系，即通過了解電阻的變化可以知道熱量的損失，從而反映了樣品的導熱性能。該方法的探頭即是采用導電合金經刻蝕處理后形成的連續(xù)雙螺旋結構薄片，外層為雙層的絕緣保護層，厚度很薄，它令探頭具有一定的機械強度并保持與樣品之間的電絕緣性。在測試過程中，探頭被放置于樣品中間進行測試。電流通過探頭時，產生一定的溫度上升，產生的熱量同時向探頭兩側的樣品進行擴散，熱擴散的速度依賴于材料的熱傳導特性。通過記錄溫度與探頭的響應時間，由數(shù)學模型可以直接得到導熱系數(shù)。

產品特點：

1、測試范圍廣泛，測試性能穩(wěn)定；

2、直接測量，測試時間5-160s左右可設置，能快速準確的測出導熱系數(shù)，節(jié)約了大量的時間；

3、不會和靜態(tài)法一樣受到接觸熱阻的影響；

4、無須特別的樣品制備，對樣品形狀并無特殊要求，塊狀固體只需相對平滑的樣品表面并且滿足長寬至少為探頭直徑的兩倍即可；

5、對樣品實行無損檢測，意味著樣品可以重復使用；

6、探頭采用雙螺旋線的結構進行設計，結合專屬數(shù)學模型，利用核心算法對探頭上采集的數(shù)據進行分析

7、樣品臺的結構設計巧妙，操作方便，適合放置不同厚度的樣品，同時簡潔美觀；

8、探頭上的數(shù)據采集使用了進口的數(shù)據采集芯片，該芯片的高分辨率，能使測試結果更加準確可靠；

9、主機的控制系統(tǒng)使用了ARM 微處理器，運算速度比傳統(tǒng)的微處理器快，提高了系統(tǒng)的分析處理能力， 計算結果更加準確；

10、儀器可用于塊狀固體、膏狀固體、顆粒狀固體、膠體、液體、粉末、涂層、薄膜、保溫材料等熱物性參數(shù)的測定；

11、智能化的人機界面，彩色液晶屏顯示，觸摸屏控制，操作方便簡潔；

二、技術參數(shù)

軟件特點： 

1、支持儀器系數(shù)校準。

2、自動計算導熱系數(shù)，熱擴散系數(shù)，相關系數(shù)，可以自動判斷結果是否符合溫升。

3、曲線可以一鍵自適應，曲線放大，縮小，視圖拖動。

4、支持同時打開多條曲線，且數(shù)量不受限制。

5、可生成報告，圖像，結果，實驗信息等，模板可自定義。

6、軟件內置試驗記錄、數(shù)據處理和報告格式。

7、可到處數(shù)據，支持 xls，tps,cvs,png 等格式導出，并支持對 xls，tps,cvs 等格式的導入。軟件具有遠程更新功能，可以自動獲取到新版本的軟件，直接安裝。

8、支持數(shù)據優(yōu)化，污點數(shù)據去除，智能化進行計算。

9、支持中文，英文， 日語，韓語切換。

部分采購高校及機構

部分使用導熱系數(shù)客戶SCI論文

1、Hydrogel beads derived from chrome leather scraps for the preparation of lightweight gypsum

2、Size-controlled graphite nanoplatelets_ thermal conductivity enhancers for epoxy resin

3、Thermal, morphological, and mechanical characteristics of sustainable tannin bio-based foams reinforced with wood cellulosic fibers

4、Improved thermal conductivity of epoxy resin by graphene–nickel three-dimensional filler

5、A synergistic strategy for fabricating an ultralight and thermal insulating aramid nanofiber/polyimide aerogel

6、Fabrication of Graphene/TiO 2 /Paraffin Composite Phase Change Materials for Enhancement of Solar Energy Efficiency in Photocatalysis and Latent Heat Storage

7、Improved thermal conductivity of styrene acrylic resin with carbon nanotubes, graphene and boron nitride hybrid fillers

8、Preparation and characterization of paraffin/expanded graphite composite phase change materials with high thermal conductivity

9、Tailoring of bifunctional microencapsulated phase change materials with CdS/SiO2 double-layered shell for solar photocatalysis and solar thermal energy storage

10、Functional aerogels with sound absorption and thermal insulation derived from semi-liquefied waste bamboo and gelatin

11、Lamellar-structured phase change composites based on biomass-derived carbonaceous

sheets and sodium acetate trihydrate for high-efficient solar photothermal energy harvest

12、Construction of double cross-linking PEG/h-BN@GO polymeric energy-storage composites with high structural stability and excellent thermal performances

13、Gelatin as green adhesive for the preparation of a multifunctional biobased cryogel derived from bamboo industrial waste

14、A novel self-thermoregulatory electrode material based on phosphorene-decorated phase-change microcapsules for supercapacitors

15、Development of poly(ethylene glycol)/silica phase-change microcapsules with well-defined core-shell structure for reliable and durable heat energy storage

16、Experimental and numerical study on heat emission characteristics of ventilated air annular in tunneling roadway

17、Construction of polyaniline/carbon nanotubes-functionalized phase-change microcapsules for thermal management application of supercapacitors

18、Mechanical, thermal and acoustical characteristics of composite board kneaded by leather fiber and semi-liquefied bamboo

19、Tuning the oxidation degree of graphite toward highly thermally conductive graphite/epoxy composites

20、Thermal self-regulatory smart biosensor based on horseradish peroxidase-immobilized phase-change microcapsules for enhancing detection of hazardous substances

21、Morphology-controlled synthesis of microencapsulated phase change materials with TiO2 shell for thermal energy harvesting and temperature regulation

22、Size-tunable CaCO3@n-eicosane phase-change microcapsules for thermal energy storage

23、High-Efficiency Preparation of Reduced Graphene Oxide by a Two-Step Reduction Method and Its Synergistic Enhancement of Thermally Conductive and Anticorrosive Performance for Epoxy Coatings

24、Temperature and pH dual-stimuli-responsive phase-change microcapsules for multipurpose applications in smart drug delivery

25、Development of Renewable Biomass-Derived Carbonaceous Aerogel/Mannitol Phase-Change Composites for High Thermal-Energy-Release Efficiency and Shape Stabilization

26、Immobilization of laccase on phase-change microcapsules as self-thermoregulatory enzyme carrier for biocatalytic enhancement

27、Microencapsulating n-docosane phase change material into CaCO3/Fe3O4 composites for high-efficient utilization of solar photothermal energy

28、Integration of Magnetic Phase-Change Microcapsules with Black Phosphorus Nanosheets for Efficient Harvest of Solar Photothermal Energy

29、Surface construction of Ni(OH)2 nanoflowers on phase-change microcapsules for enhancement of heat transfer and thermal response

30、Design and fabrication of bifunctional microcapsules for solar thermal energy storage and solar photocatalysis by encapsulating paraffin phase change material into cuprous oxide

31、Design and construction of mesoporous silica/n-eicosane phase-change nanocomposites for supercooling depression and heat transfer enhancement

32、Development of reversible and durable thermochromic phase-change microcapsules for real-time indication of thermal energy storage and management

33、Nanoflaky nickel-hydroxide-decorated phase-change microcapsules as smart electrode materials with thermal self-regulation function for supercapacitor application

34、Biodegradable wood plastic composites with phase change microcapsules of honeycomb-BN-layer for photothermal energy conversion and storage

35、Hierarchical microencapsulation of phase change material with carbon-nanotubes/polydopamine/silica shell for synergistic enhancement of solar photothermal conversion and storage

36、Molecularly Imprinted Phase-Change Microcapsule System for Bifunctional Applications in Waste Heat Recovery and Targeted Pollutant Removal

37、Pomegranate-like phase-change microcapsules based on multichambered TiO2 shell engulfing multiple n-docosane cores for enhancing heat transfer and leakage prevention

38、Innovative Integration of Phase-Change Microcapsules with Metal–Organic Frameworks into an Intelligent Biosensing System for Enhancing Dopamine Detection

39、Morphology-controlled fabrication of magnetic phase-change microcapsules for synchronous efficient recovery of wastewater and waste heat

40、Polyimide/phosphorene hybrid aerogel-based composite phase change materials for high-efficient solar energy capture and photothermal conversion