Što su praznine od cirkonija?

The name "Zirconium" comes from the Arabic "Zargon" which means "golden". Zirconium dioxide (ZrO2) was accidentally discovered by German chemist Martin Heinrich Klaproth in 1789 while performing certain procedures that involved heating certain gemstones. Subsequently, zirconium dioxide has long been used as a rare pigment. Impure zirconium is used as a pigment. In the late 1960s, the research and development of zirconium as biological material was perfected. Zirconium was first recommended as a ceramic biomaterial in the form of a ball head for total hip replacement (THR). In the early stages of development, many solid solution combinations (ZrO2-MgO, ZrO2-CaO, ZrO2-Y2O3) were tested for biomedical applications. In later years, however, research efforts have focused more on the development of zirconia-yttria ceramic combinations, commonly referred to as tetragonal zirconia polycrystalline (TZP).Because TZP has good mechanical properties and stability, and it has been proved that it will not mutagenize human cells and cause cancer, it gradually began to be used in the dental industry in 1990.

"References in this paragraph:Cirkonij: novi materijal za zubnu keramiku. Pregled

Zirconia is a polymorphic material with three phases, depending on the temperature applied to the powder. First phase is monoclinic (stable at room temperature up to 1,170 ºC); additional heating gives tetragonal phase (stable from 1,170 ºC to 2,370 ºC); further heating gives cubic phase (stable from 2,370 ºC to 2,716 ºC) ). At room temperature, zirconia exists in its most stable phase, monoclinic, but is accompanied by a volume shrinkage of approximately 4 percent to 5 percent when the monoclinic phase transforms into the tetragonal phase. The tetragonal phase transforms into the cubic phase at 2,370 degree with little volume change.

Koje su karakteristike visoko-kvalitetnih cirkonija?

Visoko{0}}kvalitetni cirkonij sastoji se od kemijski čistih sirovina s homogenom strukturom-bez defekata. U procesu proizvodnje praznih dijelova, korištenje ispravne procesne tehnologije, koju vode iskusni stručnjaci, može jamčiti visoko-kvalitetne materijale i precizno pristajanje pri proizvodnji CAM-ova u laboratoriju.

Read this article, it can help you correctly recognize the zirconia block and find the zirconia block you really need."Obitelj Vsmile HappyZir cirkonijevih diskova (Vodič za odabir uvodnih proizvoda)"