Review
Engineering, Chemical
Isabel V. Souza, Nathalia S. Finck, Camila S. Rodrigues, Rafael R. Moraes
Summary: This systematic review summarizes the evidence from in vitro studies on the effect of different glass ceramic processing methods on the bond strength to resin-based luting agents. The findings suggest that ceramics processed by CAD-CAM method generally have higher bond strength to resin-based materials compared to heat-pressing or layering processing methods.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2024)
Article
Engineering, Environmental
Xianqing Xu, Zhengqi Guo, Deqing Zhu, Jian Pan, Congcong Yang, Siwei Li, Ziye Yu
Summary: This study introduces a carbonated consolidation process using low-rank semi-coke to transform potassium feldspar into water-soluble potassium fertilizer. The addition of PF to formed coke not only increases its calorific value and reduces pollutant emissions, but also achieves a high leaching rate of potassium at a low temperature.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Jianan Liu, Anlu Wei, Longjiao Chang
Summary: In this paper, high value-added molecular sieves were prepared by extracting valuable components from low-temperature burned potassium feldspar with KOH as additive. The best roasting conditions for extracting SiO2 from potassium feldspar were determined through experiments. The reaction process was found to be a mixed control of chemical control and diffusion control, and a kinetic equation was obtained. Finally, a W-type molecular sieve was synthesized with specific properties.
Article
Chemistry, Multidisciplinary
Wei Wang, Lin Liu, Hongzhao Liu, Hongliang Wang, Hongmin Cui
Summary: In this paper, a hydrometallurgy process was investigated for recovering rare earths (REs) and niobium (Nb) from a potash feldspar ore beneficiation tailings. The REs and Nb could be leached from the tailings by sulfuric acid roasting-water leaching process, with leaching rates reaching 89.9% and 80.6% respectively. The REs were removed from the leaching liquor using HF and the rare earths fluoride (REF3) with a purity of 60.51% was obtained. Nb was recovered by solvent extraction with a Nb extraction rate of 99.59%, and Nb2O5 products with a Nb2O5 content of 87.61% were obtained through ammonia precipitation-roasting process.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Xu Zhao, Xiaolong Bi, Longjiao Chang, Shiyuan Cao, Jianan Liu, Shaohua Luo, Yuchun Zhai
Summary: This study creatively prepared high-value molecular sieves from roasted clinker obtained by calcining potash feldspar with NaOH-Na2CO3 mixed alkali as an auxiliary agent. The extraction and preparation process were optimized, resulting in X-type molecular sieves with good pore structure and characteristics.
Article
Chemistry, Multidisciplinary
Jinyue Xu, Jian Chen, Xiangjun Ren, Tao Xiong, Kai Liu, Shaoxian Song
Summary: A novel dry vibrating high-gradient magnetic separator (DVHGMS) has been developed for purification of potash feldspar by eliminating iron ores. The vibration significantly helped to eliminate particle aggregation and improve the separation, making it an efficient magnetic separator for mines in drought regions.
SEPARATION SCIENCE AND TECHNOLOGY
(2022)
Article
Construction & Building Technology
Ji-Sun Kim, Jong-Young Lee, Young-Ho Kim, Dongchan Kim, Jin Kim, Jung-Geun Han
Summary: The study developed a mortar using feldspar as a fine aggregate, which exhibited higher compressive strength compared to conventional plastering sand-based mortar and improved water tightness. The feldspar-based mortar can reduce cement dependency and be tailored to project requirements, potentially serving as an eco-friendly building material.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Chemistry, Physical
L. M. Anovitz, A. Affolter, M. C. Cheshire, A. J. Rondinone, Lawrence F. Allard
Summary: Feldspars are common minerals in the Earth's crust and synthesizing them has been a challenge, requiring high pressures, high temperatures, and hydrothermal environments. This paper introduces a method for albite synthesis that does not require high-pressure environments, allowing for controlled elemental substitutions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Review
Materials Science, Ceramics
V. Fuertes, J. J. Reinosa, J. F. Fernandez, E. Enriquez
Summary: Feldspars, the most abundant mineral in the earth's crust, have unique compositional and structural features that make them widely used in the ceramic industry. Engineered feldspar-based ceramics show promise in applications like ceramic tiles, dielectrics, and phosphors, with potential for opening new horizons in the ceramic sector.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Polymer Science
Yi-Che Hsieh, Wei-Hao Lee, Pin-Hsun Liao
Summary: This study aims to evaluate the process of synthesizing potassium-based geopolymers into leucite ceramics under various conditions, revealing the reaction mechanisms and characteristics of the KGL network. The results show that an adequate curing time can enhance material properties and form a more stable structure. By analyzing the variables, the optimal combination for forming the purest leucite phase was identified.
Article
Materials Science, Ceramics
Ming Feng, Yuming Tian, Guorong Ji
Summary: In this study, Ulan feldspar was studied as bone china raw material, and it was found that increasing the content of Ulan feldspar in bone china led to a decrease in thermal expansion coefficient and sintering temperature, while increasing thermal shock resistance and mechanical strength.
CERAMICS INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Jiangyan Yuan, Hongwen Ma, Zheng Luo, Xi Ma, Qian Guo
Summary: The study focused on processing K-bearing rocks to make potassium accessible to agriculture, resulting in the successful production of two types of KAlSiO4. By comparing the crystal structures of the two types of KAlSiO4, the research highlighted the importance of effective utilization of aluminosilicate minerals in nature. Additionally, the study adopted a kinetics model to describe the dissolution behavior, revealing the higher dissolution reaction rate of K-feldspar mainly relies on the alkaline solution.
Article
Environmental Sciences
Yanfei Tian, Xianshu Dong, Yuping Fan, Dong Yang, Ruxia Chen
Summary: This study describes a new method for preparing high-ash coal slime silica compound fertiliser. The synthesized fertiliser has a high effective silicon content and meets market requirements. The optimal reaction conditions for different types of coal slime were determined, and it was found that different conditions are required for the synthesis process.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Geochemistry & Geophysics
M. Gaeta, B. Bonechi, F. Marra, C. Perinelli
Summary: Leucititic rocks with K-foiditic composition play a significant role in the Colli Albani volcanic district, indicating the presence of large explosive eruptions fed by K-foiditic magma chambers. The pre-eruptive magmatic system in Colli Albani is characterized by a(H2O) < 1 and high CO2 activity. Studies on the glasses and minerals from K-foiditic scoria clasts provide insights into the assimilation processes and differentiation of magmas in the area.
Review
Engineering, Chemical
Jayashree Samantray, Amit Anand, Barsha Dash, Malay Kumar Ghosh, Ajaya Kumar Behera
Summary: Potassium is the third crucial macronutrient required for plant development and growth. It is predominantly present in soluble form in soil evaporite deposits found in countries like Canada, Belarus, Israel, USA, and Russia. Other countries depend on imports from these countries to meet their potash requirement. However, a significant amount of potassium exists in insoluble form as silicate minerals, such as feldspar and micaceous minerals, abundantly found in these countries. Various methods, including bio-leaching, acid leaching, base leaching, and roast-leach studies, have been adopted to release potassium from these silicate resources. This review provides an overview of these methodologies and highlights future research possibilities.
MINERALS ENGINEERING
(2022)
