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| 1 | 20 Years Advances in Preparation of Potassium Salts from Potassic Rocks:A Review显示文摘Long-term research on key techniques of clean utilization of potassic rocks from over twenty localities has been performed to settle the shortage of soluble potassium resources in China. The results show that K-feldspar as the principal mineral enriched in potassium could be decomposed in the media of Ca(OH)_2, NaOH, KOH-H_2O solution via hydrothermal treatment, into tobermorite, hydroxylcancrinite, and kalsilite respectively. By further processing, these compounds are feasible for being as slow-release carrier of potassium nitrate, extracting alumina, and preparing farm-oriented fertilizers of potassium sulphate and nitrate. Correspondingly, the filtrate is KOH,(Na, K)_2SiO_3, and K_2SiO_3 solution, from which potassium carbonate, sulphate, nitrate, and phosphate could be easily fabricated. As NaO H and KOH are recycled in the processing chains by causticizing sodium and/or potassium metasilicate solutions, the hydrothermal alkaline techniques as developed in this research have several advantages as lower consumption of disposable mineral resources and energy, maximized utilization of potassic mineral resources, as well as clean productions etc. Based on the approaches presented in this paper, the technical system of efficiently utilizing insoluble potassium resources has been established. The hydrothermal alkaline methods are feasible to be industrialized on a large scale, thus resulting in decreasing imports of potash fertilizers, improving the pattern of potassium fertilizer consumption, and enhancing the supplying guarantee of potassium resource in China. | MA Hongwen YANG Jing SU Shuangqing LIU Meitang ZHENG Hong WANG Yingbin QI Hongbin ZHANG Pan YAO Wengui | 2015 | Acta Geologica Sinica(English Edition)2015，89，6： | 5 |
| 2 | Single-molecule observation of mechanical isomerization of spirothiopyran and subsequent Click addition显示文摘Spirothiopyran(STP)is particularly attractive when used as a mechanophore to endow polymers with both damage-signaling and.self-reinforcing capacity.It is,however,not clear the actual force required to induce the cycloreversion of STP into ring-opened thiomerocyanine(TMC),which reacts spontaneously with activated C=C bonds.Here,we used atomic force microscopy(AFM)-based single molecule force spectroscopy(SMFS)to study the mechanochemistry of STP mechanophore.It is found that the ring-opening of STP at room temperature requires forces of-200-400 pN,depending on the pulling speed.In addition,the reversibility of STP to TMC isomerization is demonstrated.Finally,mechanochemically induced intermolecular Click addition is achieved in single'molecule level by pulling STP in the presence of maleimide. | Ruixiang Yao Xun Li Nan Xiao Wengui Weng Wenke Zhang | 2021 | Nano Research2021，14，8： | 1 |
| 3 | High creep resistance behavior of the casting A1-Cu alloy modified by La 显示文摘 | Dongming Yao Wengui Zhao Feng Qiu | 2009 | Scripta Materialia2009，61，： | 1 |
| 4 | High creepresistance behavior of the casting Al-Cu alloy modified by La 显示文摘 | Yao Dongming Zhao Wengui Zhao Hailong | 2009 | Scripta Materialia2009，61，： | 1 |
| 5 | Compositions,Proportions,and Equilibrium Temperature of Coexisting Two-feldspar in Crystalline Rocks显示文摘Compositions,proportions,and equilibrium temperature of coexisting two-feldspar in crystalline rocks are of great importance to classification in petrography and interpretation of petrogenesis.Crystalline rocks are usually composed of 4-6 minerals(phases),depending on their independent chemical components and the equilibrium temperature of crystallizations.In general,number of mineral phases can be determined by the 'Phase Rule'.According to the mass balance principle,bulk composition of coexisting two-feldspar could be evaluated from the bulk chemistry of a rock,provided that the compositions of the coexisting mafic mineral phases containing calcium,sodium,and potassium oxides are determined,e.g.,by microprobe analysis.The compositions,proportions,and temperature of two-feldspar in equilibrium can thus be simultaneously resolved numerically from bulk composition of the rock,by incorporating the activity/composition relations of the ternary feldspars with the mass balance constraints.Upon the numerical approximation method presented in this paper,better-quality,internally consistent data on feldspar group could usually be obtained,which would be expected more realistic and accurate in consideration of thermodynamic equilibria in the system of crystalline rocks,as well as bulk chemistry of a rock and the composing minerals. | MA Hongwen YANG Jing SU Shuangqing YAO Wengui | 2017 | Acta Geologica Sinica(English Edition)2017，91，3： | 1 |
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