Investigation of Structural Formation of Starting Composition 2245 in the Bi-Pb-Sr-Ca-Cu-O System Superconductors

Table 1

Heating profile and results of X-ray diffraction analysis of samples.

Sample name	History of heat treatment		Å	Å	Å	Cell volume; (10^−30) m^3	Grain size; (in nm)
	Temperature (°C)	Duration (hours)
M1	835	42	5.387	5.301	24.574	701.747	40.116
M2	835	42	12.247	3.780	3.259	150.871	74.570
M12 A	850	5	5.393	5.421	30.788	900.200	61.139
M12 B	850	10	5.389	5.395	30.767	894.580	75.690
M12 C	850	15	5.392	5.365	30.874	893.198	61.137
M12 D	850	20	5.401	5.391	30.775	896.255	72.250
M12 E	850	25	5.404	5.396	37.253	1086.570	63.580
M12 F	850	30	5.398	5.402	37.220	1085.335	58.870
M12 G	850	40	5.390	5.415	37.216	1086.217	44.170
P 2245	835	45	5.423	5.407	37.003	1085.008	68.814