Calcium sulphoaluminate, C4A3S, is an important mineral phase for rapid hardening sulphoaluminate cement. Its formation from molar mixes of the oxides of calcium aluminum and sulphur derived from synthetic pure chemicals and commercial grade natural minerals, such as limestone, bauxite and gypsum ha
Studies on chemical kinetics of positronium complex formation
β Scribed by Youming Du; Tianbao Zhang; Chun Cao; Yun-Ti Chen; Jiachang Liang
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 823 KB
- Volume
- 175
- Category
- Article
- ISSN
- 0301-0104
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Positron annihilation lifetime spectra have been measured on styrenemethyl methacrylate, styrene-acrylonitrile, and styrene-butyl methacrylate copolymers. The results show that the longest lifetime 3 remains constant during extended PALS measurement in all experiment copolymers, and relative intensi
Cherricat rel&&on stud& k iotiic surface &tiw, agents in aqueous solutions have: been carried outu% kg ultrasonic fl-61; t~~~rature f7-93 and pressure [IO] jump techniques. In af$ these experimknts a single relaxation has been observed at surfactant con-.centrations cIose to the' c.m.c. This relaxat