Optimization on Influencing Factors of Fracture Toughness of Corundum-Mullite Toughened by In Situ Synthesized Mullite Whiskers by Response Surface Methodology

2012 ◽  
Vol 581-582 ◽  
pp. 819-822 ◽  
Author(s):  
Bin Meng ◽  
Jin Hui Peng
Keyword(s):  
Fracture Toughness ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Response Surface Method ◽  
Sintering Temperature ◽  
Surface Method ◽  
Mullite Whiskers ◽  
Optimized Conditions ◽  
Addition Amount

The corundum-mullite was toughened by in-situ synthesized mullite whiskers and the process parameters influencing the fracture toughness of corundum-mullite, such as sintering temperature, addition amount of AlF3 and V2O5, were optimized by means of response surface method. Corundum-mullite with fracture toughness of 9.44 MPa.m-1/2 could be obtained under the optimized conditions, i.e. sintering temperature of 1400°C, 4.8 wt.% of AlF3 and 5.8 wt.% of V2O5. The results showed that it was feasible to prepare corundum-mullite toughened by in-situ synthesized mullite whiskers by the optimized parameters. In addition, an accurate model based on response surface method was proposed to predict the experimental results.

Optimization of Factors Influencing the Aspect Ratio of Mullite Whiskers Based on Single Factor Analysis and Response Surface Methodology

2012 ◽  
Vol 581-582 ◽  
pp. 782-785
Author(s):  
Bin Meng ◽  
Jin Hui Peng
Keyword(s):  
Response Surface Methodology ◽  
Aspect Ratio ◽  
Response Surface ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Holding Time ◽  
Single Factor ◽  
Factors Influencing ◽  
Mullite Whiskers ◽  
Addition Amount

The mullite whiskers were synthesized from commercial raw materials by sintering in air. Three factors influencing the aspect ratio of whiskers, including sintering temperature, holding time and addition amount of V2O5, were analyzed based on single factor design and response surface methodology respectively. The optimum conditions for the synthesis of mullite whiskers with highest aspect ratio was obtained, i.e. sintering temperature was 1316.87°C, addition amount of V2O5 was 4.09wt.% and holding time was 1.96h. The experiment at the optimum condition was conducted and the real experimental value agrees to the predicted value based on response surface methodology.

scholarly journals Modelling and optimization of metals (As, Ca, Cd, Cr, Cu, Fe, Mg, and Pb) and Ethylene glycol butyl ether in paints using response surface method

2021 ◽  
Vol 23 (2) ◽  
pp. 177-190
Author(s):  
A. F. I. Apanpa-Qasim ◽  
A. O. Adeyi ◽  
Sharvari Deshmukh
Keyword(s):  
Experimental Data ◽  
Response Surface Methodology ◽  
Ethylene Glycol ◽  
Response Surface ◽  
Response Surface Method ◽  
Principal Component ◽  
Butyl Ether ◽  
Surface Method ◽  
Principal Component Analyses ◽  
Modelling And Optimization

Response surface methodology (RSM) and principal component analyses (PCA) modelling tools have been used in this study to quantitatively describe the interaction effects of more than one factor on system response for the modelling and optimization of experimental data. In Nigeria, there are no stringent policies in place by the government on paint production and this has led to unregulated paint products by producers in the commercial markets. Water-based paints currently available in Nigerian market were sampled. Experimental data of Metals (As, Ca, Cd, Cr, Cu, Fe, Mg, and Pb) and Ethylene glycol butyl ether (Volatile organic compounds (VOC)) measured using Inductively Coupled Plasma-Optical Emission Spectrometer (ICP-OES) and Gas Chromatography-Flame Ionisation Detector (GC-FID), respectively was used to develop a mathematical model. The principal component analyses were explained with a cumulative variance of 82% for the VOC and 76% for metals based on manufacturers. Estimated responses were compared with the experimentally determined responses and prediction capabilities of Response Surface Methodology. In the RSM, the 2 developed model had R value of 0.9569, with optimized value at 0.10 % (1000ppm) of Ethylene glycol butyl ether and concentration (ppm) ranges of As (383.0-1,930.0), Ca (614.0-10,400.0), Cd (98.0-2,000.0), Cr (10.3- 225.0), Cu (133.0-1,840.0), Fe 742.0-2,910.0, Mg (4,000.0-99,510.0), Pb (170.0-3,230.0). The correlation and optimization study employed are applicable for assessing the impact of hazardous air pollutants on indoor air quality and a good applicability in paint industries to produce products within the set limit of international standards. For the purpose of reducing sick building syndrome and protecting public health, it was important to investigate paints and sealers extensively. Keywords: VOCs; Paint; metals; Ethylene glycol butyl ether; Response Surface Method

Optimization of Condensate Fractionation Unit Using Response Surface Methodology

2014 ◽  
Vol 625 ◽  
pp. 462-465
Author(s):  
Mohammad Taufik Ibrahim ◽  
Nooryusmiza Yusoff
Keyword(s):  
Response Surface Methodology ◽  
Taguchi Method ◽  
Central Composite Design ◽  
Response Surface ◽  
Response Surface Method ◽  
Optimal Configuration ◽  
Base Case ◽  
Surface Method ◽  
Central Composite ◽  
Fractionation Unit

Response Surface Method involving central composite design is employed to determine the optimal configuration of nine factors for maximizing the profit of a Condensate Fractionation Unit. When compared with the results from the base case and Taguchi method, the result from RSM shows higher profits by 33.1% and 1.16%, respectively. A further benefit of 0.64% is noticed when three insignificant factors were removed from the nine-factor experiment due to interactions between factors.

scholarly journals DETERMINING OPTIMIZED CONDITIONS FOR REMOVAL OF CHLOROPHYLL IN EXTRACTED LIQUID FROM NEEM LEAVES BY DISTILLED WATER BY RESPONSE SURFACE METHOD

2011 ◽  
Vol 14 (4) ◽  
pp. 36-42
Author(s):  
Do Van Vu ◽  
Nguyen Hong Nguyen ◽  
Tri Ly Minh Nguyen
Keyword(s):  
Response Surface ◽  
Response Surface Method ◽  
Ethanol Extract ◽  
Distilled Water ◽  
Surface Method ◽  
Neem Leaves ◽  
Initial Content ◽  
Almost All ◽  
Optimized Conditions ◽  
And Storage

Chlorophyll content in liquid ethanol extract of neem’s leaves has bad effect on quality and storage time of the extract. In this study, we tried to remove remaining chlorophyll in the liquid ethanol extract of neem’s leaves by distilled water. The results showed that after chlorophyll removing, the liquid extract still retained almost all the biological activity ingredients (limonoid). Three effecting factors, i.e., (i) The time to cool to precipitate chlorophyll in the extracted liquid, (ii) The initial content of chlorophyll; (iii) The ratio between the extracted liquid and distilled water added all affect chlorophyll removal efficiency, have been studied. The Response Surface Method (RSM) showed that, the optimal conditions for removing chlorophyll process, the ratio between extracted liquid and distilled water respectively is 16.8 μg/ml and 1.3 (13:10; v:v). The time to cool to precipitate chlorophyll in the extracted liquid didi not have significantly affect on the performance of the removing chlorophyll’s contents.

scholarly journals Simple synthesis of new imidazopyridinone, pyridopyrimidinone, and thiazolopyridinone derivatives and optimization of reaction parameters using response surface methodology

RSC Advances ◽  
2019 ◽  
Vol 9 (52) ◽  
pp. 30479-30488 ◽  
Author(s):  
Fahimeh Sadat Hosseini ◽  
Mohammad Bayat
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Response Surface Method ◽  
Aromatic Aldehydes ◽  
Simple Synthesis ◽  
Reaction Parameters ◽  
Reaction Conditions ◽  
One Pot ◽  
Surface Method ◽  
The One

The one-pot reaction of various diamines with cysteamine hydrochloride or 1,1-bis(methylthio)-2-nitroethene, aromatic aldehydes, and Meldrum's acid led to pyridone compounds in good yields. The reaction conditions were optimized using response surface method.

scholarly journals APLIKASI RESPONSE SURFACE METHOD DALAM OPTIMASI PROSES THERMAL TREATMENT PASIR ZIRKON

2018 ◽  
Vol 4 (1) ◽  
pp. 1-5
Author(s):  
Zaldy Kurniawan ◽  
Muhammad Subhan ◽  
Ilham Ary Wahyudie
Keyword(s):  
Response Surface Methodology ◽  
Thermal Treatment ◽  
Saddle Point ◽  
Response Surface ◽  
Response Surface Method ◽  
Surface Method ◽  
Eigen Value

Abstrak   Zirconia (ZrO2) merupakan material keramik yang banyak digunakan di industri. Pasir zirkon (ZrSiO4) merupakan salah satu sumber zirkonia. Produksi zirkonia dari pasir zirkon dapat dilakukan dengan proses perlakuan panas atau perlakuan kimia dengan tujuan memecah ikatan antara ZrO2 dan SiO2. Pada penelitian ini Response Surface Methodology (RSM) diaplikasikan untuk menentukan nilai optimal persentase ZrO2 dari proses dekomposisi pasir zirkon melalui proses perlakuan panas. Sampel yang disiapkan sebanyak 13 variasi dengan 3 replikasi. Analisis hasil percobaan didapatkan Eigen value dengan nilai –0,146262 (X1) dan 0,172908 (X2). Hal ini menunjukkan bahwa kombinasi temperatur dan waktu penahanan tidak teridentifikasi optimum pada satu titik saja namun tersebar di seluruh daerah saddle point.

scholarly journals Activated Carbon Production from Agricultural Biomass Using Response Surface Method (RSM) for Cd (II) Removal

2014 ◽  
Vol 69 (3) ◽  
Author(s):  
Mutah Musa ◽  
Akira Kikuchi ◽  
Zaiton Abdul Majid ◽  
Jafariah Jaafar ◽  
Mohd Razman Salim
Keyword(s):  
Activated Carbon ◽  
Response Surface ◽  
Response Surface Method ◽  
Correlation Coefficients ◽  
Good Prospect ◽  
Surface Method ◽  
Model Equations ◽  
Optimized Conditions ◽  
Temperature Time

The production of activated carbon (AC) from sugarcane bagasse (SCB) was carried out using central composite design of response surface method to run a limited number of experiments with the possibility of revealing the interaction of three selected factors of temperature, time and nitrogen/steam flowrate at different levels. Two second order quadratic regression model equations were developed using statistical analysis with Design Expert® software. The models were used for the prediction of removal of Cd2+ and carbon yield. Correlation coefficients (R2) were 0.957 for removal and 0.985 for yield, showing the sufficiency of the model in predicting response within 13 experimental runs. Characterization of the product with optimal performance which was produced at 900oC, with nitrogen/steam flow of 100 mL/min and activation time of 30 minutes, was carried out. The performance showed this AC sample was able to remove 62.42% Cd2+ from an aqueous solution with concentration 2 mg/L within 2 hours at optimized conditions. Experimental results indicated that AC from SCB had good prospect for Cd2+ removal.

Optimization of Process Parameters of Zirconia Reinforced Alumina by Powder Forming Process Using Response Surface Method

2014 ◽  
Vol 984-985 ◽  
pp. 129-139 ◽  
Author(s):  
S. Renold Elsen ◽  
T. Ramesh ◽  
B. Aravinth
Keyword(s):  
Physical Properties ◽  
Response Surface ◽  
Response Surface Method ◽  
Process Parameters ◽  
Sintering Temperature ◽  
Compaction Pressure ◽  
Research Work ◽  
Forming Process ◽  
Surface Method ◽  
Powder Forming

Powder forming process is used for fabrication of bulk ceramic components. Optimization of powder forming process parameters in the fabrication of alumina-zirconia composite used in orthopedic implants is done for desired physical property. In this research work, process parameters such as composition of zirconia, compaction pressure and sintering temperature were analyzed using Response Surface Method (RSM). The physical properties such as density, porosity and water absorption characteristics of the proposed composite were studied. To study the influence of the different process parameters over the physical properties of the fabricated composites materials, experimental runs were framed by using Box behnken method. Three factors and two levels were selected with a total of 17 runs and their consecutive tests were carried out. The validity of the model was checked and the significant parameters were identified using Analysis of variance (ANOVA). The results indicate that the sintering temperature is influencing predominantly the physical properties of composites compared to other process parameters.

scholarly journals Fabrication optimization of polyethersulfone (PES)/polyvinylpyrrolidone (PVP) nanofiltration membranes using Box–Behnken response surface method

RSC Advances ◽  
2017 ◽  
Vol 7 (40) ◽  
pp. 24995-25008 ◽  
Author(s):  
Mohammad Peydayesh ◽  
Maryam Bagheri ◽  
Toraj Mohammadi ◽  
Omid Bakhtiari
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Response Surface Method ◽  
Phase Inversion ◽  
Nanofiltration Membranes ◽  
Surface Method

Herein response surface methodology (RSM) is employed to optimize the fabrication of polyethersulfone (PES) nanofiltration (NF) membranes via phase inversion.

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