1. Borate luminous material, wherein, comprises the compound of following structural formula: M2(Re1\u2212xLnx)2B2O7, wherein x is in a range of 0<x\u22660.5, M is alkali metal element, Ln is at least one of Tm, Tb, Eu, Sm, Pr, Dy, Ce and Bi, Re is selected from one or more element of Y, Gd, Sc, Lu and La.
2. Borate luminous material according to claim 1, wherein, the value of said x is in a range of: 0.001\u2266x\u22660.4.
3. Borate luminous material according to claim 1, wherein, said alkali metal element is at least one of Na, K, and Li.
4. Borate luminous material according to claim 1, wherein, said Re is element Y.
5. Borate luminous material according to claim 1, wherein, said Re is the combination of element Y and at least one element of Gd, Sc, Lu and La.
6. Preparation method of borate luminous material, wherein, comprising the steps of: using the compound used as the source of alkali metal element M+, the compound used as the source of Re3+, the compound used as the source of Ln ion, and boric acid or boron oxide as raw materials, wherein, all the raw materials are added at the molar ratio of the elements in the structure formula M2(Re1\u2212xLnx)2B2O7, wherein, 0<x\u22660.5, M is alkali metal element, Re is selected from one or more element of Y, Gd, Sc, Lu and La, Ln is at least one of Tm, Tb, Eu, Sm, Pr, Dy, Ce and Bi; grinding and mixing all said raw materials homogeneously; calcining the mixed raw materials and cooling them to obtain the borate luminous material.
7. Preparation method of borate luminous material according to claim 6, wherein, said calcining proceed comprising: pre-calcining the grinded powders at the temperature in a range of 600 to 800\xb0 C. for 0.5 to 2 h, and sintering at the temperature in a range of 900 to 1300\xb0 C. for 1 to 20 h.
8. Preparation method of borate luminous material according to claim 6, wherein, the value of said x is in a range of: 0.001<x\u22660.4.
9. Preparation method of borate luminous material according to claim 6, wherein, said Re is element Y, or the combination of element Y and at least one element of Gd, Sc, Lu and La.
10. Preparation method of borate luminous material according to claim 6, wherein, said source of alkali metal element M+ is at least one of carbonate and oxalate, said compound used as the source of Re3+ is at least one of its oxide, chloride, nitrate, carbonate and oxalate, said compound used as the source of Ln ion is at least one of its oxide, chloride, nitrate, carbonate and oxalate.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A non-transitory computer readable medium useful in association with a skeleton key server which includes one or more processors, and a memory, the computer readable medium including computer instructions which are configured to cause the skeleton key server, by execution of the computer instructions in the one or more processors from the memory, to implement authentication of a first device associated with a user account using at least one second device accessible by the first device, wherein the second device is user-selected and fingerprintable, by:
transmitting an authentication information request to the first device;
receiving an encrypted identification data from the first device which has been encrypted by at least one device fingerprint of at least one second device accessible by the first device, wherein the second device is user-selected and fingerprintable;
decrypting the encrypted identification data using a skeleton key associated with the user account;
wherein the skeleton key includes at least one stored device fingerprint, and the decrypting step further comprises using the at least one stored device fingerprint to decrypt the encrypted identification data;
comparing the decrypted identification data with a primary identification data associated with the user account; and
authenticating the computing device when the decrypted identification data matches the primary identification data.
2. The computer readable medium of claim 1 wherein the encrypted identification data has been encrypted by device fingerprints of a plurality of second devices accessible by the first device, wherein the second devices are user selected and fingerprintable.
3. The computer readable medium of claim 2 wherein the skeleton key includes a plurality of stored device fingerprints, and the decrypting step further comprises using the plurality of stored device fingerprints to decrypt the encrypted identification data.
4. The computer readable medium of claim 3 wherein the transmitting step includes transmitting a user prompt to be displayed on the first device that prompts the user to make accessible the second devices accessible by the first device.
5. The computer readable medium of claim 1 wherein the encrypted identification data has been encrypted by device fingerprints of the second device accessible by the computing device, wherein the second device is user-selected and fingerprintable.
6. The computer readable medium of claim 5 wherein the skeleton key includes a plurality of stored device fingerprints, and the decrypting step further comprises using the plurality of stored device fingerprints to decrypt the encrypted identification data.
7. The computer readable medium of claim 6 wherein the transmitting step includes transmitting a user prompt to be displayed on the first device that prompts the user to make accessible the second device accessible by the first device.