難熔性 的英文怎麼說
中文拼音 [nánróngxìng]
難熔性
英文
infusibility-
It is found that the chemical durability of na2o4teo2 glass is dominated by the humidity of the surrounding air during the processes of glass melting and the following cooling. the mystery that na2o4teo2 glass crystallizes after drop shaft experiment, which has puzzled glass researchers for many years, is solved. this work indicates a way for making na2o4teo2 glass with good chemical durability
此反應主要受玻璃在熔化和冷卻過程中的環境濕度控制，存放過程中的空氣濕度對它也有影響，這解決了困惑人們多年的落塔實驗中na _ 2o ? 4teo _ 2玻璃析晶的問題和na _ 2o ? 4teo _ 2玻璃穩定性難以控制的問題，為制備空氣中穩定的na _ 2o ? 4teo _ 2玻璃提供了明確的依據。It is a dozen metals in one ; now almost diamond - hard - - and again almost as soft as copper ; here brittle as glass ? there malleable1o as silver ; now welding quite readily - - again, very difficult to weld ; melting rather easily - - at other times difficult to diffuse ; usually very magnetic - - and : again almost non - magnetic ; an excellent conductor of heat and electricity - - and at times stubbornly resistant to both
鐵將十多種金屬特性合而為一：時而幾乎堅硬如金剛石，時而又柔軟如銅；此處易碎如玻璃，彼處又可展延如銀；時而很容易焊接，時而又很難焊合；有時相當易熔，有時又極難擴散；通常情況下富有磁性，但有時又幾乎磁性全無；本是熱和電的優良導體，但有時卻頑強地抗拒二者。In this paper, pure and doped ktp crystals were grown from the flux using a top - seeded method, and special technique have been used to lower the electrical conductivity to three orders of magnitude than common flux ktp, the values is up to 10 - 10 ( cm ) - 1, this overcame the shortcoming that common flux ktp cannot be used in e - o application field because of having higher electrical conductivity. the growth condition, doped elements and annealing technology were investigated. single crystals of ktp with high quality and big z - cut cross section were obtained by optimizing the parameter of crystal growth
本實驗採用頂部籽晶熔劑法生長了純的以及不同摻雜的ktp晶體，用特殊工藝處理技術將普通熔劑法ktp的電導率降低了三個數量級，達到了10 ~ （ - 10 ） （ cm ） ~ （ - 1 ） ，解決了普通熔劑法ktp晶體由於離子電導率太大而無法用於電光應用領域的困難；對ktp晶體的生長條件、摻雜元素以及退火工藝等進行了研究，通過優化生長工藝技術參數，突破了工藝技術生長難關，得到了高光學均勻性、具有大z切面的ktp單晶。Emcut 178 is brown colored, sulfur - chlorinated oil providing the maximum in anti - weld characteristics for difficult machining and grinding
Emcut 178是棕色的硫氯復合油，為困難的加工或研磨提供最高等級的抗熔著性能。There are kinds of polycarbonate ( pc ), it is worth a kind of engineering materials for bisphenol a - polycarbonate, its main shortcoming are crazed easily, high molten body viscidity and difficult forming process characteristic, so many kinds of modified methods are brought into effect for it
摘要聚碳酸酯品種較多，作為工程材料最有價值的是雙酚a型聚碳酸酯，其主要缺點是易開裂，熔體粘度高，成型加工較困難，為此進行了各種改性方法。Directionally solidified refractory metal matrix eutectic in - suit composites possess excellent mechanical and physical properties such as low density, high enduring temperatures, good room - temperature fracture - toughness and high elevated - temperature strength, therefore are expected to be used as a new type of ultra - high temperature structural materials
定向凝固難熔金屬基共晶自生復合材料由於具有密度低、承溫能力高、室溫斷裂韌性好、高溫強度高和高溫持久壽命長等性能優勢，有望成為新一代航空發動機葉片用超高溫結構材料。Catalytic activity comparison of alkali metal refractory compounds for methanol dehydrogenation to water - free formaldehyde
甲醇脫氫制甲醛反應中堿金屬難熔鹽的催化性能研究If a new round of small, precursor eruptions begins in yellowstone ? and they usually do so weeks to hundreds of years before a catastrophic explosion ? testing the oxygen fingerprint of those lavas and the ages of their zircons should reveal what type of magma is abundant in the chamber below
如果黃石國家公園開始產生新一波前兆性質的小型噴發（通常是在災難性爆發的前幾周甚至數百年前） ，這時測試熔巖中含氧的特徵以及鋯石的年齡，應該就可以了解下方巖漿庫富含何種型態的巖漿。A superalloy double helix integrated impeller with good performances of dimensional precision, microstructure and mechanics was rapidly manufactured by hpdm ( hybrid plasma deposition & milling ) method proposed by author ' s, laboratory, which synthesized plasma deposition as an additive technology, and milling as a subtractive technique during the processing
摘要採用等離子熔積與銑削復合製造技術，在等離子熔積成形過程中復合銑削精整，試制了難加工高溫合金雙螺旋整體葉輪樣件，其組織性能和力學性能均高於採用傳統工藝加工獲得的葉輪。This paper found two problems during the preparation processes of polypropylene / organophilic montmoriuonite ( pp / ommt ) nanocomposite and poly ( vinyl chloride ) / organophilic montmorillonite ( pvc / ommt ) nanocomposite : one was that pp / mmt nanocomposite was difficultly prepared by melt intercalation as a result of pp is non - polarity polymer ; other was that ommt resulted in pvc degraded in preparation of pvc / mmt nanocomposite by melt intercalation
本文從在pp mmt和pvc mmt納米復合材料制備過程中出現的兩個難題著手進行研究：一是由於pp的非極性，難以直接用有機蒙脫土（ ommt ）熔融插層法制備pp mmt納米復合材料；二是利用熔融插層法制備pvc mmt納米復合材料過程中， ommt導致的pvc熱降解問題。分享友人