Crystallization Behavior and Microstructural Analysis of Lead-Rich (𝐏𝐛_𝑥𝐒𝐫_1−𝑥) TiO_𝟑 Glass Ceramics Containing 1 mole %𝐋𝐚_𝟐𝐎_𝟑

Table 2

Heat treatment schedules, glass ceramic codes, and crystalline phases of different lead-rich glass ceramic samples in the system [(Pb_xSr_1-x)O⋅TiO₂]-[2SiO₂⋅B₂O₃]-[BaO⋅K₂O]-[La₂O₃].

Glass code	Glass ceramic code	Heat treatment schedules			Crystalline phases
		Heating rate (°C/min)	Holding time (hrs)	Holding temp (°C)
PTL5B	PTL5B700T	5	3	700	P+PT
	PTL5B700S	5	6	700	P+PT
9PL5B	9PL5B597T	5	3	597	P+PT
	9PL5B635T	5	3	635	P+PT
	9PL5B700T	5	3	700	P+PT^∗
	9PL5B700S	5	6	700	P+Pb
8PL5B	8PL5B726T	5	3	726	P+R
	8PL5B726S	5	6	726	P+R^∗
7PL5B	7PL5B686T	5	3	686	P+R^∗+PT
	7PL5B739T	5	3	739	P
	7PL5B739S	5	6	739	P+PT
6PL5B	6PL5B730T	5	3	730	P+R
	6PL5B730S	5	6	730	P+U^∗
5PL5B	5PL5B806T	5	3	806	P+R
	5PL5B806S	5	6	806	P+R^∗

P: Perovskite titanate, PT: PbTi₃O₇, R: Rutile (TiO₂), Pb: Pb₂O₄,∗Trace amount.