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volume expansion 【物理學】體積膨脹。

volume indicator

By using this model , the contribution of the thermal volume expansion of the matrix to the ptc transition of the composite is quantitatively estimated . the theory and experiment revealed that the conductive mechanism of abrupt resistivity increase at ptc transition region was equivalent as abrupt resistivity increase at the percolation curve close the critical volume fraction 可以利用這個模型,對基體體積膨脹對ptc轉變的貢獻進行了定量分析,表明ptc轉變區的電阻突變與滲流曲線在臨界體積分數附近的電阻率突變在導電機制上是相同的。

Study on the synthesis of corundum - mullite - gahnite multiphase materials by one - step sintering process using high purity raw materials showed that the more the content of gahnite in multiphase materials , the high the volume expansion would be introduced in the system , which resulted in the sintering difficulty of the multiphase materials . while the content of gahnite was controlled about 30wt % and the content of mullite was about 70wt % , the densified multiphase materials can be obtained after fired at 1600 or 1700 采用高純原料一步合成剛玉?莫來石?鋅鋁尖晶石復相材料研究表明:復相材料中鋅鋁尖晶石含量越高,則合成鋅鋁尖晶石時產生的體積膨脹越大,燒結性也就越差;當鋅鋁尖晶石含量為30wt ,莫來石含量較高為70wt左右時,在1600或1700燒后都能得到顯微結構較為致密的復相材料。

3 . with the consider of one mgo concrete arch dam in guangdong province , its construct course was simulated and its thermal field , autogenous volume expansion field , strain field , stress field and displacement field were also analyzed . at the same time , the simulated analysis theory and accuracy and rationality of the program were validated in comparison with the prototype observation data 3 、結合廣東某外摻mgo混凝土拱壩,對其施工過程進行了模擬,完成了壩體的溫度場、自生體積膨脹場、應變場、應力場及位移場的實時仿真分析,同時結合原型觀測資料的分析,對仿真分析成果進行了驗證。

The equipment for simultaneously measuring resistance , volume expansion and temperature was constructed . two different polymer matrices , crystalline high density polyethylene ( hdpe ) and amorphous polystyrene ( ps ) were selected , which were loaded with carbon black ( cb ) 自行設計制作電阻-體積膨脹-溫度同步測量裝置,研究了炭黑( cb )填充聚合物基ptc材料的電阻率隨體積膨脹的變化關系,聚合物基體分別為結晶聚合物高密度聚乙烯( hdpe )和非晶聚合物聚苯乙烯( ps ) 。

The volume expansion played a major role in determining its magnetic properties . complicated magnetic phase transitions induced by external magnetic field were found in carbonization of lafe _ ( 11 . 4 ) al _ ( 1 . 6 ) compound with low carbon concentration . and the temperature of phase transition depends on magnetic field strongly 同時發現,碳含量較低時, lafe _ ( 11 . 4 ) al _ ( 1 . 6 )碳化物在磁場誘導下呈現出有趣的復雜磁相變,相變溫度強烈依賴于外加磁場。

Fitting the experimental data into the general effective media ( gem ) equation , a theoretical percolation curve was gained . a mathematical model was proposed which is based on the gem equation and the dilution effect of filler volume fraction due to thermal volume expansion 使用有效介質普適方程( gem方程)對實驗數據進行擬合,得到導電復合材料的理論滲流曲線,根據gem方程和基體的體積膨脹,建立起一個數學模型。

Comparisons of the resistivity and thermal volume expansion of the ptc composites revealed that the thermal volume expansion is one of the leading factors for the polymeric ptc transition . the more the thermal volume expansion is , the stronger the ptc effect shows 研究結果表明,無論結晶還是非晶聚合物體系,體積膨脹都是引起復合材料ptc效應的重要原因,聚合物基體的熱膨脹程度越大, ptc效應也越明顯。

The t - r characteristics may originate from the total function of volume expansion and temperature susceptibility of asphalt , the deference of volume expansion coefficient with heat between asphalt and graphite , and internal stress 而溫敏產生的原因則為瀝青的體積膨脹、石墨和瀝青的熱膨脹系數差異、內部應力和瀝青溫度敏感性共同作用的結果。

The sn - cu alloys with shell structure were prepared to reduce the problem of volume expansion . the morphology and composition of these alloys were charactered by sem and ed 為了緩解錫合金在循環過程中的體積膨脹,使用熱處理的方法制備了殼層結構的sn - cu合金材料。

The change of lattice constants and the cell volume expansion are calculated , which make an important contribution to the increase of the magnetocrystalline anisotropy 計算了引起材料磁晶各向異性大大增加的點陣常數的變化和體積膨脹量。

This diaphragm avoids a pressure rise in the case that is due to the temperature bound volume expansion of the liquid filling , thus avoiding indicated errors 當溫度突升造成填充液體膨脹時,膜片可以避免壓力升高,從而避免指示錯誤。

This diaphragm avoids a pressure rise in the case that is due to temperature bound volume expansion of the liquid filling , thus avoiding indicated errors 當溫度突升造成填充液體膨脹時,膜片可以避免壓力升高,從而避免指示錯誤。

Using the multiple volume expansion method , the co2 content is determined at two different volume expansions of the measuring chamber 使用多次容積膨脹法,測量池在兩次不同的膨脹中測定co2含量。

Automatic volume expansion 自動音量擴展

Laminated wood plastics . compreg determination of extreme volume expansion 木質層積塑料.極限體積膨脹率的測定