Abstract: The present disclosure discloses a high zirconia brick and a preparation process and use thereof. The high zirconia brick includes the following components in percentage by weight: 40-99% of zirconia, 0.1-60% of alumina, and 0.1-40% of yttria, iron oxide, titania, magnesia, calcia, and silica in total. In the present disclosure, heating and annealing cooling are controlled by means of curved temperature control, and a high zirconia brick prepared has uniform and segregation-free distribution of all elements and consistent overall density, without defects such as needle-like pores, bubble retention, and surface cavities. The high zirconia brick prepared by the technological method has features of short delivery cycles of products and customizable production.

Abstract: The present invention is applicable to the field of communications and provides a transmission method, a system, and a communication device for realizing coexistence of data and voice services. The method includes: acquiring an idle timeslot available when voice transmission is performed by using Digital Enhanced Cordless Telecommunications (DECT); and performing Wireless Fidelity (Wi-Fi) transmission in the idle timeslot available when voice transmission is performed by using DECT. In the present invention, an idle timeslot available when voice transmission is performed by using DECT is first acquired, and then the idle timeslot available when voice transmission is performed by using DECT is used to perform Wi-Fi transmission, so as to realize coexistence of Wi-Fi and DECT in a time division multiplexing manner.