ZfN: Search Results

1	Author	Mutsuo Igarashi, Noriaki Okubo, Ryozo Yoshizaki	Requires cookie*
	Title	Na Nuclear Spin-Lattice Relaxation in Dehydrated Zeolite NaY
	Abstract	The spin-lattice relaxation time T\ of 2, Na-NMR in dehydrated zeolite NaY has been measured from 26 to 300 K. The magnetization recovery curve is not single-exponential at all measured temperatures and 1 increases in proportion to the square of temperature above 200 K. The result is analyzed with a theory of the Raman process based on covalency. The value of T\ is compared with that of NaX in which the concentration of Na is about 2 times larger than in NaY.
	Reference	Z. Naturforsch. 53a, 442—446 (1998); received December 30 1997
	Published	1998
	Keywords	Dehydrated Zeolite NaY, 23 Na-NMR, T\ \ Raman Process, Phonon Spectrum
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	TEI-XML for	default:Reihe_A/53/ZNA-1998-53a-0442.pdf
	Identifier	ZNA-1998-53a-0442
	Volume	53

2	Author	Mutsuo Igarashi, Noriaki Okubo, Shuichi Hashimoto, Ryozo Yoshizaki, DeokJoon Cha	Requires cookie*
	Title	Na Spin-Lattice Relaxation Measurements in Dehydrated Na-X Zeolite
	Abstract	The spin-lattice relaxation time T\ of 23 Na-NMR in a dehydrated Na-X zeolite has been measured from 20 to 300 K. The recovery curve is not single-exponential at all measured temperatures and T\~ 1 increases with the square of temperature around room temperature. The results are analyzed by assuming non-equivalent sites and by applying the theory of the Raman process based on covalency.
	Reference	Z. Naturforsch. 51a, 657—661 (1996); received October 17 1995
	Published	1996
	Keywords	Dehydrated Na-X zeolite, 23 Na-NMR, spin-lattice relaxation, Raman process, nonequivalent sites
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	TEI-XML for	default:Reihe_A/51/ZNA-1996-51a-0657.pdf
	Identifier	ZNA-1996-51a-0657
	Volume	51