1) Δ-product
Δ-积
2) Lebesgue-Δintegral
Lebesgue-Δ可积
3) deta-sigma
Δ-∑
4) oxygen-deficient nickel ferrite
NiFe2O4-δ
1.
5 g,the optimum reduction condition for the preparation of oxygen-deficient nickel ferrite,NiFe2O4-δ,reduced by H2 was as follows: reduction temperature was 320 ℃,H2 flow rate was 40 mL/min and reduction time was 3 h.
采用柠檬酸络合法制备NiFe2O4,运用XRD、DTA-TG等手段对其结构进行表征,并探讨还原条件对NiFe2O4-δ的结构稳定性及其催化分解CO2成C反应活性的影响。
5) δ phase
δ相
1.
The precipitation behavior of δ phase, γ ′′ and γ ′ phase was studied through adjusting precipitated strengthening elements Al, Ti and solution strengthening element W in 718 alloy.
通过对718合金中沉淀强化元素Al,Ti以及固溶强化元素W含量的调整,研究了δ相形成规律及合金中γ′′/γ′复合析出组织的形成条件,同时分析了合金的微观组织与力学性能之间的关系。
2.
It is shown that the addition of Ti and Al can evidently decrease the oxidation rates of alloy,and both Nb-15Ti-11Al and Nb-30Ti-15Al(β+δ) show superior oxidation resistance than Nb-35Ti-6Al(β) which may be attributed to the decreased solubility and diffusion of oxygen in δ phase.
研究表明,元素Ti和Al的加入能有效改善合金的抗氧化性能,合金中δ相的存在降低了氧的溶解度,同时抑制氧的扩散,因而两相合金Nb-15Ti-11Al和Nb-30Ti-15Al(β+δ相)抗氧化性能优于单相合金Nb-35Ti-6Al(β相)。
6) La_(0.8)Sr_(0.2)MnO_(3-δ)
La0.8Sr0.2MnO3-δ
补充资料：积积
1.长久累积。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条