過共熔的 的英文怎麼說
中文拼音 [guògòngróngde]
過共熔的
英文
hypereutectic-
Each chemic and physical characteristics of phosphate glass is discribed, the compounding and fabrication of er / yb co - doped phosphate gain material are argued
對磷酸鹽玻璃的各種成份進行了測試,然後通過熔制得到鉺鐿共摻磷酸鹽增益玻璃材料。The result shows that all these system are simple eutectic, at the same time, the entropy of phase change of every system in the eutectic point is determined by using differential scanning calorimetry ( dsc ) on the basis of experimental research, through the improved one - parameter margules equation by introducing a new variable temperature, the improved equation was designed to compute solid - liquid equilibrium
測定結果表明,這幾組體系均為簡單低共熔體系;同時利用差熱掃描量熱法( dsc )對上面各組體系低共熔點處的相變焓進行了測定。在實驗研究的基礎上,通過改進單參數margules方程並引入新的變量溫度,達到了將此方程用於固液平衡計算的目的。The s - l - e experiment data for the eight binary condensed systems of fatty alcohol / fatty acid were treated by using the improved equation, and the equation was examined with experimental data. at the same time, we used ideal model to predict the tenary s - l - e of n - octadecane / lauric acid / stearic acid system, and we got an accurate result of the simple eutectic temperature. the relative error is 0. 51 % comparing with the experimental result, so we will offer a method of prediction for quickly obtaining multicomponent system phase change materials this article calculated the pcms quantities and energy saving effect in theory, designed the experimental apparatus to measure the energy saving effect, and analyzed the temperature equalization action of the pcms by comparing experiment
利用這種方法,建立了適合醇-羧酸等系列二元體系的單參數margules方程,本文對醇-羧酸系列等8個二元凝聚體系的單參數margules方程的參數進行回歸,並利用整個實驗數據對模型進行了檢驗,另外,本文利用理想狀態模型對一個三元體系18烷-月桂酸-硬酯酸相圖進行預測,通過與實驗數據進行比較,預測的低共熔溫度與實驗測定溫度較為吻合,其相對誤差為0 . 51 ,這將為快速獲取多元體系的相變材料提供預測方法。This research regarded pp grafted mah as compatibilizer, took the method of masterbatch and use new technologies prepare into high relatively content masterbatch of ommt, finally, this kind of masterbatch and pp were mixing and melting together and pp / mmt nanocomposites were prepared through pairs of spiral pole, ( series pp - b ), meantime, pp / mmt nanocomposites without compatibilizer were compared to study ( series pp - a )
本研究以pp接枝馬來酸酐為相容劑,採取母粒法,運用新型工藝制備出蒙脫土含量較高的接枝母粒,然後將這種母粒與pp通過雙螺桿共混熔融擠出制備出pp蒙脫土納米復合材料( pp - b系列) ,同時比較研究了不加相容劑的pp蒙脫土納米復合材料( pp - a系列) 。The crystallization and melting behavior of mellocene - catalized branched and linear polyethylenes of low molecular weight was studied. it was found that the crystalline lattice of branched polyethylene is larger than that of linear polyethylene because of the existence of branched chains. the melting behavior of branched polyethylene is similar to that of linear polyethylene since the branched chains can not enter the lattice. however, the crystalline behavior of low molecular weight branched polyethylene is the same as that of high molecular weight linear polyethylene, but different with that of low molecular weigh linear polyethylene. kinetics theory analysis evidenced that the transition temperature of growth regime of the branched polyethylene is about 20 lower than that of linear polyethylene with the same molecular weight. it may be attributed to the existence of short branched chains
研究了金屬茂催化的低分子量支化聚乙烯和線性聚乙烯的結晶及熔融行為,發現支化聚乙烯的結構與線性聚乙烯相同為正交結構,但晶格略有膨脹.支鏈的存在對熔融行為影響不大,兩種聚乙烯的熔點均隨結晶溫度的升高而非線性增加,表現出低分子量樣品的共同特徵.但支鏈的存在對結晶行為卻有很大的影響,主要是由於支鏈的存在降低了晶體的結晶速率從而影響結晶過程,使得低分子量的支化聚乙烯的結晶行為與高分子量線性聚乙烯的結晶行為相似而與低分子量的線性聚乙烯不同.動力學分析表明,低分子量的支化聚乙烯的結晶生長方式的轉變溫度比同等分子量的線性聚乙烯降低了約20In this investigation carbon black - filled electrical conductive composites of poly ( ethylene terephthalate ) / polyethylene were first prepared through the single - screw melt - blended extrusion, then drawing, followed by the quenching and subsequent press molding. the relationships among the influencing factors including composition, hot stretching ratio and compatibilizer, morphology and properties of composites were systematically investigated. positive temperature coefficients effect and crystallization behaviors of composites were preliminarily analyzed
本文擬採用單螺桿熔融共混擠出?熱拉伸?淬冷的新的成型方法制備炭黑填充的pet pe復合導電材料,熱拉伸的目的是使材料的分散相( pet相)在加工過程中原位形成纖維,而炭黑基本分散在纖維中或纖維的表面上,使炭黑粒子間間距減小,形成更多的導電通路,從而提高材料的導電性能,同時保持或提高材料的力學性能。Through the research of crosslinking of matrix resin, heating treatment of composite and mixing of different polymer, we draw some conclusions : 1 、 percolation theory can explain the phenomenon of the jump of resistance when the content of cb reach a critical volume ; 2 、 based on ohm conduct theory, abounded to the percolation the wbibull statistical theory and other theory, an adapted theory was obtained to explain the jump of resistance and the other phenomenon ; 3 、 the ntc phenomenon was eliminated by crosslinking the matrix of conductive composite, at the same time the stability of composite was improved
通過對基體樹脂的交聯、復合材料的熱處理、聚合物共混物的研究得出了如下的結論: 1 、滲濾理論能夠很好的解釋導電粒子含量達到某一值時電導率劇增的問題; 2 、在歐姆導電模型的基礎上,綜合應用了weibull統計理論模型,結合原來的體積膨脹等理論,成功的解釋了ptc復合材料在基體材料熔點附近的跳變問題、 ntc現象以及熱循環穩定性等問題; 3 、有機ptc導電復合材料經硅烷交聯以後能夠消除ntc現象,改善了導電復合材料的穩定性能。The maximal power outputs of 37. 0 mw / cm2 and 30. 0 mw / cm2 for the p - and n - type laminated materials respectively at the temperature difference 490 have been experimentally obtained, which are about 2. 5 and 3. 0 times those of - fesi2. chemical analyses show that the interface failure between the bridge alloy and the semiconductor bi2te3 results mainly from the eutectic mixtures with low melting point and brittle compounds formed during welding and long time annealing at 190. it is found that the electrical properties of a laminated structure are mainly controlled by the wettability of the bridge alloy on the semiconductor surface
發現: 1 )疊層材料具有明顯優于均質材料的熱電性能,在490溫差下, p -型和n -型疊層材料的最大輸出功率分別達到37 . 0和30 . 0 ( mw / cm ~ 2 ) ,是同類型均質- fesi _ 2的2 . 5和3倍; 2 )在焊接過程和190長時間退火處理過程中,焊接過渡層合金和基體半導體(特別是bi _ 2te _ 3 )之間存在明顯的元素相互擴散,從而在過渡層中形成一些低熔點共晶體和脆性化合物,這是導致疊層材料破壞的主要原因; 3 )焊接過渡層合金與半導體基體之間的潤濕性是影響界面層電性能的主要因素。Two - step procedure is preferable to prepare high molecular weight poly ( olefin - ester ) s with a high polar monomer content and a high melting temperature
兩段聚合過程適于制備高分子量的烯烴共聚酯,聚合物收率達90 % ,極性單體的插入率大於10 % ,熔融溫度高達120 。Carbon black ( cb ) was pre - treated by titanate coupling agent and electrical conductive master batche ( ecmb ) for fiber were prepared by melt - extruding pre - treated cb with pet, pe and pet / pe blend
摘要將經偶聯劑處理后的炭黑分別與聚酯、聚乙烯及聚酯聚乙烯共混聚合物,通過雙螺桿熔融共混,制備了纖維級導電母粒。There are some disadvantages in the processing of the materials for the insulation of high voltage power cable in china such as the process equipments are complicate, which need more energy and the process flow is long and so on, we need to intake that vast scale from foreign enterprises yet. in order to change the present status, this paper has successfully developed the materials with new process equipments and new process flow, which are made with compounds containing universal resins of china and assistants such as peroxide, antioxidant and so on
為了改變國內高壓電力電纜絕緣料尚需大量進口和國內研製的高壓電力電纜絕緣料存在加工設備繁雜、能耗大和工藝流程長等不足的現狀,本論文採用國產通用樹脂,加入交聯劑、抗氧劑、加工助劑等,通過物理預混和熔融共混的方法,用國產設備特定的組合和特定的生產工藝,成功開發了可交聯ldpe高壓電力電纜絕緣料。In this section, a small organic molecule is applied to instead of pzt with the purpose to avoid the rigidity difference between cpe and pzt. ( 1 ) there is no plateau area in the conductivity curve of cpe / pzt / vgcf composite, which is due to the molecular level blending of cpe and zkf in molten condition during the preparation of cpe / zkf / vgcf composites, further verifying that pzt is conducive to the formation of conductive loop
通過對cpe / zkf / vgcf復合材料的分析探討得出: ( 1 ) cpe / zkf腳gcf復合材料的導電曲線上並不存在類似cpe / pzt渾gcf復合材料的半導區平臺,這是由於cpe億kf / vgcf復合材料的制備是在cpe和zkf熔融的狀態下的分子水平的共混,進一步證明了pzt對導電迴路形成的雙重作用;同時,由於zkf對vgcf的包覆作用,使cpe億kf那gcf復合材料導電臨界值較高。One night, for example, we looked up to notice that the sky above the center was clear, but there were clouds everywhere else. this reminded us of master s remark that the light from group meditation is so strong that it can dissolve clouds
例如,有一晚我們仰望天空,發現除了小中心上方清朗無雲外,其餘四周布滿雲層,這讓我們想起師父曾說過,共修所凝聚的光非常強,甚至可以熔化雲層。分享友人