Crystal phase formation in colored leucite-reinforced glass-ceramics for dental restorations

Tunable UV/blue luminescence in rare-earth free glass-ceramic phosphor

“…51 La ruta de procesamiento es aún más complicada cuando se intenta sintetizar un material vitrocerámico con una alta cristalinidad y, por tanto, una pequeña cantidad de fase vítrea residual, lo cual suele requerir el empleo de tratamientos térmicos de larga duración 52 y en algunos casos el empleo de sistemas de vacío. 53 Sin embargo, Bernardo et al 9 , consiguieron sintetizar un material vitrocerámico basado en cristalizaciones de nefelina (NaAlSiO4), con un tratamiento térmico a 930 ºC de, aproximadamente, 6 horas de duración. Posteriormente, se reporta la síntesis de materiales vitrocerámicos basados en cristalizaciones de feldespatos potásicos (microclina y ortoclasa) 10 a una temperatura de 750 ºC con un tiempo aproximado de duración de 4 horas y media.…”

Study of the crystallization in fast sintered Na-rich plagioclase glass-ceramic

“…Feldspars are usually integrated in igneous rocks and, therefore, they have many impurities and intermediate compositions. Feldspar synthesis is still a challenge to obtain pure phase materials under controlled conditions to tailor properties [1][2][3].…”

“…A frit is a ceramic composition that has been melted in a special melting oven and quenched to form a glass. However, the further thermal treatment of frits developed a typical porcelain structure in which feldspar crystallization occurs in a continuous glassy matrix [1,2]. Feldspars find several difficulties to crystallizes from its melts, and thus, the use of seeds is usually necessary to produce feldspars by this route [4,10].…”

“…Feldspars find several difficulties to crystallizes from its melts, and thus, the use of seeds is usually necessary to produce feldspars by this route [4,10]. The processing route became more complex when a high crystalline glass-ceramic is pursuit, since larger thermal treatments are required and in some extent it is combined with vacuum systems [2,11].…”