첨가제 제조
금속의 입자 크기 분포 및 입자 모양 분석 데이터를 제공합니다.
금속 제조에는 분쇄, 가스, 액체 및 원심 미립화, 직접 환원 및 추출을 포함한 다양한 물리적 및 화학적 공정이 포함됩니다. 각 방법에는 최종 제품의 입자 크기, 입자 모양, 품질 및 기타 물리적 및 화학적 특성을 보장하기 위해 온도, 압력, 등급, 격리 및 보호와 같은 엄격한 모니터링 지표가 있습니다.
입자 크기, 입자 모양 및 분말의 물리적 특성을 테스트함으로써 Bettersize 장비는 금속의 개발 및 제조 공정에서 제품 품질을 모니터링 및 제어하고 제품 품질을 개선하며 생산 기술을 최적화할 수 있습니다. 적용 가능한 제품에는 알루미늄 분말, 비스무트, 청동, 금속 탄화물, 카드뮴, 크롬, 코발트, 구리 분말, 갈륨, 하프늄, 인듐, 철 분말, 납, 마그네슘 분말, 몰리브덴 분말, 니켈, 니오븀, 백금, 레늄, 루비듐, 실리콘, 은, 스트론튬, 탄탈룸, 주석, 이산화티타늄, 텅스텐, 바나듐, 이트륨, 아연 분말, 산화지르코늄, 기타 희소 금속 및 이러한 1차 금속의 다양한 합금 등이 있습니다.
또한 분말 금속 부품 제조에는 입자 크기 및 형상 분석이 필요합니다. 분말 금속 부품은 다양한 제조 기술을 사용하여 분말 금속으로 만들어집니다. 이러한 기술에는 프레스 및 소결, 분말 단조, 열간 등방성 프레스, 전류 보조 소결, 금속 사출 성형, 선택적 레이저 용융 등이 있습니다.
원자화된 금속 분말의 크기 사양은 종종 다른 많은 부품 제조 공정보다 엄격합니다. 표면이 얇은 복잡한 부품의 경우 D(50)가 더 작고 입자 크기 분포가 더 좁을 수 있습니다. 밀도와 강도를 최적화하고 완제품의 공극을 최소화하기 위해 레이저 용융기 베드의 느슨한 충진 밀도를 최대화하려면 바이모달 분포가 필요할 수 있습니다.
생성된 입자는 우수한 유동성과 레이저 용융기 베드의 패킹을 위해 고도로 구형이고 표면이 매끄러워야 합니다.
오염 물질은 모든 금속 분말에 해로우며 단일 오염 물질도 부품의 매우 얇은 부분에 점 결함을 일으킬 수 있습니다. 품질 관리에서 동적 이미지 분석을 사용하여 입자가 불규칙하거나 표면이 거칠거나 반투명한지 모니터링할 수 있습니다. 목적에 부적합한 재료의 양은 샘플의 부피 또는 개수 비율로 정량화할 수 있습니다.
금속 분말을 재활용하면 재활용 시 마모되고 오염될 수 있습니다. 사양을 벗어나면 사양 분말을 다시 생산하기 위해 용융 및 재분무(비용이 많이 드는 비용)해야 합니다.
금속 분말의 품질 관리는 분말 제조업체의 출고 검사 및 분말 야금 부품 제조업체의 입고 검사의 품질 사양을 충족시키기 위해 수행되어야 합니다. 분말의 형태 및 입자 크기 분포는 금속 분말의 유동성, 충진 밀도 및 오염 수준에 영향을 미칩니다.
또한, 아래 시스템으로 분말의 형태 및 입자 크기 분포를 측정하면 성형 부품의 생 강도, 다공성, 소결 강도 및 기계적 특성을 결정하는 데 도움이 됩니다.
Citations
- Bettersizer 2600
Functional redundancy as an indicator for evaluating functional diversity of macrobenthos under the mussel raft farm near Gouqi Island
DOI: 10.1016/j.aquaculture.2023.740024 Read Article
Zhejiang Ocean University | 2024Biological traits analysis (BTA) helps to evaluate the effects of different environmental variables on the traits-based functional composition of macrobenthos. However, research on functional traits of macrobenthos under mussel farming is limited. We investigated the spatial and temporal response of the benthic system in terms of taxonomic and functional diversity to environmental variables of farming and natural stressors resulting from suspended mussel farming near Gouqi Island of eastern China Sea. The functional traits of macrobenthic assemblages under mussel farming were characterized by “medium adult body size”, “vermiform body form”, “high flexibility”, “infauna”, “semi-motile”, “gonochoristic”, “surface deposit-feeders”, “carnivores”, “semi-motile burrowers”, and “tube-dwellers”. Functional redundancy was stable in response to mussel farming stresses among seasons, whereas species diversity showed efficient to evaluate natural variables. Functional diversity was significantly affected by farming stressors rather than natural variables, Further analysis using multivariate methods together with continuous monitoring were highlighted to evaluate the impacts of mussel farming. Our results reinforce the importance of macrobenthic species and functional traits analysis to evaluate human stresses driven impacts in offshore ecosystems. By analysing the environmental variables with different sources, independently, we concluded the main effects of human pressures on macrobenthic community. Such distinction could be particularly effective to isolate variable environmental descriptors and evaluate their effects on functional diversity, making the current approach promising for the evaluation of ecological effects of anthropogenic stressors in aquaculture areas. - Bettersizer 2600
Degradation characteristics and utilization strategies of a covalent bonded resin-based solid amine during capturing CO2 from flue gas
DOI: 10.1016/j.seppur.2023.125621 Read ArticleChina University of Petroleum | 2024In this study, various types of degradation as well as attrition which are possibly encountered in a circulating fluidized bed temperature swing adsorption (CFB-TSA) process, were conducted experimentally to evaluate the stability of a resin-based solid amine sorbent. Other characterizations methods, such as elemental analysis (EA), Fourier transform infrared spectroscopy (FTIR) etc. were applied to further reveal the degradation mechanisms. The results showed that thermal degradation occurs from 140–160 °C due to the decomposition of amine group. The CO2-induced degradation occurs from a higher temperature of 160–180 °C accompanied by the production of urea. Hydrothermal stability is good below 130 °C, but the ionic impurities in steam crystalized on particle surface can accelerate the degradation. Oxidative degradation is the most harmful, which starts at a lower temperature of 70–80 °C with the formation of aldehyde. The existence of H2O in atmosphere can alleviate the oxidative and CO2-induced degradations. The employed sorbent has a very low attrition index of 0.05, which is 1–2 orders lower than typical commercial fluidized bed catalysts. Based on the results of stability evaluation, some design suggestions for proper utilization of this sorbent or other similar resin-based sorbents have been provided in an industrial CFB-TSA process.
- Bettersizer 2600
De-branching of starch molecules enhanced the complexation with chitosan and its potential utilization for delivering hydrophobic compounds
DOI: 10.1016/j.foodhyd.2023.109498 Read ArticleShihezi University | 2024The current study aimed to prepare the complexes between debranched-waxy corn starch and chitosan polymers (DBS-CS), and then investigated their corresponding structural characteristics, rheological property and potent application in Pickering emulsion. The results indicated that the existence of chitosan significantly inhibited starch short-range molecular rearrangement for all DBS-CS samples, which was manipulated by both debranching treatment and chitosan content. Interestingly, this is the first study to reveal that the outstanding peak at 1.8 ppm in 1H NMR spectrum for sample DBS-CS was gradually shifted towards a lower-field region following an increased chitosan content. Moreover, the debranching treatment shifted the crystallinity pattern from A-type to B-type and the relative crystallinity of DBS-CS decreased gradually with the increased content of CS. All samples had a pseudoplastic fluid and shear-thinning behavior with an enhanced shear resistance following the complexation. The DBS-CS was applied in a Pickering emulsion for showing a greater emulsifying stability and a lower gel strength than native NS-CS prepared emulsion. Importantly, the encapsulation ability of curcumin in the DBS-CS emulsion was significantly improved, followed by an increase of 15.45% for its corresponding bioavailability compared to the control. Therefore, this study might highlight a potential carrier for delivering the bioactive substances in a green pattern. - Bettersizer 2600
Heat-induced aggregation behavior of wheat gluten after adding citrus pectin with different esterification degree
DOI: 10.1016/j.foodhyd.2023.109420 Read ArticleGansu Agricultural University | 2024Wheat gluten aggregation during heat treatment is beneficial to the final quality of gluten-based products. Exogenous pectin can affect gluten aggregation. However, the effect of pectin with different degrees of esterification on the heat-induced aggregation behavior of gluten and its possible mechanism are still unclear. Thus, the heat-induced aggregation behavior of gluten after adding pectin with different esterification degree was studied in this study. When the temperature was raised from 25 °C to 95 °C, pectin affected gluten aggregation and was related to the degree of esterification. Specifically, the results of rheological properties and particle size indicated that low-ester pectin improved the viscoelasticity of gluten and promoted gluten aggregation. Thermal properties revealed that enthalpy of gluten added with low-ester pectin (37%) increased from 92.96 J/g to 95.40 J/g during heating process. Structurally, the fluorescence intensity and surface hydrophobicity of gluten added with low-ester pectin (37%) were lower than those added with high-ester pectin (73%). In addition, low-ester pectin (37%) significantly increased the disulfide bond content (from 15.31 μmol/g to 18.06 μmol/g) and maintained β-sheet content of gluten compared with gluten alone at 95 °C, indicating that low-ester pectin was more likely to induce gluten aggregation. However, scanning electron microscope showed that the gluten added with low-ester pectin (46%) exhibited a denser network structure at 95 °C than that added with low-ester pectin (37%). These results will provide a theoretical base for the regulation of gluten aggregation and the quality of gluten-based products by pectin with different esterification degree.
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선별된 리소스
- Application Note
bigClick2023-07-05
Using BeNano 90 Zeta to measure the particle size and zeta potential of multicolor UV-sensitive resins
- Application Note
bigClick2022-04-06
Particle characterization for additive manufacturing: Analysis of the key parameters particle size and shape using only one instrument