tg-dtg 中文意思是什麼

Therrnogravimetric analysis at heating rates 5, 10, 15 and 20 c / min was used to study the decomposition kinetics of the pdms / pma ipn in ni and in air by using tg and dtg, and the upper limit of the temperature was 700 c. it was found that ipn began to decomposite at 350 c. the process of the thermal degradation was multiple steps, the curve of the rate of thermal decomposition had two peaks, one of which lied between 400 c ~ 420 c and the other lied between 500 c ~ 540 c, the result corresponded to the components of ipn

在熱分解動力學研究中，通過在兩種氣氛中，分別以5 、 10 、 15和20 min四種升溫速率條件下，採用tg - dtg聯動測試， ipn材料在350開始熱分解。熱分解速率存在兩個峰值，一個分解峰值在400 420之間，另一個在500 540之間，這與ipn結構中包含兩組分相對應，同時發現當緩慢升溫時，特別是在空氣氣氛中，兩個分解峰減弱，熱分解趨向於一個連續過程。

The measurement of oxygen desorption activation energy by thermogravimetry ( tg ) and differential thermogravimetry ( dtg ) curves with different heating rates shows clear evidences that the behavior of tg, dtg, and desorption activation energy have some relations with the oxygen stoichiometry of the specimeri when temperature changes from 500c to 800c

採用多升溫速率熱重法得到的tg 、 dtg數據計算yba _ 2cu _ 3o _ （ 7 - x ）的氧脫附活化能。實驗表明，當溫度在500 - 800范圍變化時， tg 、 dtg的變化行為及脫附活化能明顯的和樣品的氧含量有關。

In water, the apparent viscosity of composite particles is much lower than that of uncoated graphite with the same solid content ; composite particles have good dispersion effect under different ph value with dispersant agent of sodium hexametahposphate. through the analysis of tg - dtg curve, the oxidation resistance of composite particles has been greatly improved

復合粉體水漿體的表觀粘度比相同質量固含量的未處理石墨大大降低，而且在以六偏磷酸鈉為分散劑時，復合粉體在不同的ph值條件下都取得了很好的分散效果。

( 3 ) the results of thermal analysis showed that the dta, tg and dtg curve of remainders had the similar shapes in different decaying periods

（ 3 ）熱分析的結果顯示，不同腐解期腐解物的dta 、 tg和dtg曲線的形狀基本相似。

This text completely and systematically studies the status and the development of the pyrolysis and the fluidization of biomass, which distill the bio - oil in the domestic and international area, as well as the existing problems. this thesis primarily include following aspects : ( l ), by experimenting and measuring the energy ( heat value ) and the content of c, h, n chemical element of right 20 kinds of common biomass, on the base of the experimental result, and respectively established the biomass energy predict experiment formula with the element of h and c is from change, and passed the ro. os examination, which provides the basis and convenience for flash pyrolysis fluidization device energy to convert the rate to compute with biomass energy utilization calculation ; ( 2 ), proceeded the tg and dtg experimentation equal velocity ( 10 ? / min, 20 ? / min, 40 ? / min, 60 ? / min ) heating and constant temperature heating by studying on eight kinds of biomass samples, according to the experimental data and arrhenius formula, we established the dynamics model of pyrolysis of, then, using the goast - redfern and p function, we also solved the dynamics parameters and analyze out every kind of biomass ' s frequency factor and parameters of activation energy, and established the every kind of dynamics model of pyrolysis of biomass, all of these provide the theories and basis to make sure the reactor ' s flash pyrolysis work temperature scope design and the describing of pyrolysis reactor dynamics ; ( 3 ), in order to study and ascertain the process of heat completely getting to pyrolysis time of varied size biomass particles, we observed and measured the ratio of length and diameter ( l / d ) with the varied biomass through electron microscope, we concluded the l / d ratios usually is from 5. 0 to 6. 0, the average is 5. 3 ; ( 4 ), we studied the process of biomass transiting and the theory of complete pyrolysis time with the theory of complicated heat field, we got the time ( t ) of the varied size biomass particles arriving to complete pyrolysis, and we knew that the complete pyrolysis time and the time which get to the biggest production ratio are identical, all of these studies provide the theory base for design and forecasting the flash pyrolysis reactor solid state resort time ; ( 5 ), according to the above experiment result, synthesize to make use of the engineering the mechanics, engineering the material, machine the design to learn the principle, deduce, establish the theory of rotation cone flash pyrolysis reactor material resort time ( t ) and reasonable rotation velocity ( or frequency ) relation theory ; and ( 6 ), we gave the reactor ' s smallest cone angle certain, reactor cone wall strength design theory, the reactor production ability theory, the power design method and the critical rotation velocity theory

本文較全面、系統地綜述了國內外生物質熱解液化制取生物燃油技術研究發展現狀及存在的問題，主要研究內容有： （ 1 ）實驗、測定了20種常見生物質的能量（發熱量）和c 、 h 、 n元素含量，根據實驗結果分別建立了以h和c為自變量的生物質能量預測經驗公式，並通過r _ （ 0 . 05 ）檢驗；為閃速熱解液化裝置能量轉化率計算和生物質能量利用率計算提供了依據和方便； （ 2 ）選擇了8種生物質試樣作了等加熱速率（ 10 min 、 20 min 、 40 min 、 60 min ）和恆溫加熱的tg和dtg實驗，根據實驗數據和阿倫尼烏斯公式建立了生物質熱解反應動力學微分方程，並採用goast - redfem積分法和p函數對其動力學參數進行了求解，解析出各種生物質的頻率因子和活化能參數，進而建立了各種生物質的熱解動力學模型，為科學確定反應器的閃速熱解工作溫度范圍及熱解反應動力學描述，提供了理論和依據； （ 3 ）為研究和確定不同尺度的生物質顆粒中心達到全熱解的時間，在體視顯微鏡下對不同粒度的生物質顆粒的長徑比進行了實驗觀察和測定，得出生物質的長徑比（ l d ）一般在5 . 0 6 . 0之間，平均為5 . 3的結果； （ 4 ）採用復雜溫度場傳熱學理論對生物質傳熱過程及充分熱解時間理論進行了研究，解析推導出了不同尺寸生物質顆粒中心溫度達到充分熱解溫度的時間（ t ） ，得出了理論推導的充分熱解時間與最大產油率的熱解時間相一致的結果，為閃速熱解反應器固相滯留時間設計和預測提供了理論依據； （ 5 ）根據上述實驗結果，綜合運用工程力學、工程材料、機械設計學原理，推導、建立了轉錐式閃速熱解反應器物料滯留時間（ ）與轉速（或頻率）合理匹配理論； （ 6 ）提出了轉錐式閃速熱解反應器的最小錐角設計、錐壁強度設計、生產能力設計理論和功率計算方法及臨界轉速理論等。

Besides, multiple decomposition peaks appeared in the tg and dtg curves, which resulted from the existance of different segments in the polymers

Tg和dtg曲線上多重峰的出現反映的聚合物中不同基團熱穩定性的差別。

The tg - dtg curves of combustion process, which were gained under different pressure, oxygen concentration and particle size, were analyzed in detail

討論了不同壓力、不同氧濃度、不同粒徑的半焦tg - dtg曲線圖，並對它們加以比較。